NZ793725A - Restimulation of cryopreserved tumor infiltrating lymphocytes - Google Patents

Abstract

The present disclosure provides methods for re-stimulating TIL populations that lead to improved phenotype and increased metabolic health of the TILs and provides methods of assaying for TIL populations to determine suitability for more efficacious infusion after re- stimulation.

Description

The present disclosure provides methods for re-stimulating TIL populations that lead to improved phenotype and increased lic health of the TILs and provides methods of assaying for TIL populations to determine suitability for more efficacious infusion after re- stimulation.

NZ 793725 RESTIMULATION OF CRYOPRESERVED TUMOR INFILTRATING LYMPHOCYTES CROSS REFERENCE TO RELATED ATIONS This application claims priority to U. S. Provisional Patent Application Nos. 62/413,283 and 62/413,387, filed October 26, 2016, entitled “Expansion of Tumor- Infiltrating Lymphocytes and s of Using the Same,” and US. Provisional Patent Application No. ,452, filed October 31, 2016, entitled “RESTIMULATION OF ESERVED TUMOR INFILTRATING LYMPHOCYTES,” which are hereby incorporated by reference in their entirety.

BACKGROUND OF THE INVENTION Treatment of bulky, refractory cancers using adoptive transfer of tumor infiltrating lymphocytes (TILs) ents a powerful approach to therapy for patients with poor prognoses. Gattinoni, er al., Nat. Rev. Immunol. 2006, 6, 383-393. A large number of TILs are ed for successful immunotherapy, and a robust and reliable process is needed for cialization. This has been a challenge to achieve e of cal, logistical, and regulatory issues with cell expansion. ased TIL expansion followed by a “rapid expansion process” (REP) has become a preferred method for TIL expansion because of its Speed and efficiency. Dudley, er al., Science 2002, 298, 850-54, , et 61]., J. Clin.

Oncol. 2005, 23, 2346-57, Dudley, et 51]., J. Clin. Oncol. 2008, 26, 5233-39, Riddell, er al., Science 1992, 257, 238-41; Dudley, et al., J. Immunolher. 2003, 26, 332-42. REP can result in a 1,000-fold expansion of TILs over a 14-day period, although it requires a large excess (e. g., ZOO-fold) of irradiated allogeneic peripheral blood mononuclear cells ), often from multiple donors, as feeder cells, as well as anti-CD3 antibody (OKT3) and high doses of IL-2. Dudley, et 61]., J. ther. 2003, 26, 332-42.

TILs that have undergone an REP procedure have produced successful adoptive cell therapy following host immunosuppression in patients with melanoma. Current infusion acceptance parameters rely on readouts of the composition of TILs (e.g., CD28, CD8, or CD4 positivity) and on fold expansion and viability of the REP product.

However, current REP protocols, as well as current TIL expansion protocols generally, give little insight into the health of the TIL that will be infused into the patient. T cells undergo a profound metabolic shift during the course of their maturation from naive to effector T cells (see Chang, el al, Nat. Immunol. 2016, I 7, 364, hereby expressly incorporated in its ty, and in particular for the discussion and s of anaerobic and aerobic metabolism). For example, naive T cells rely on mitochondrial respiration to produce ATP, while mature, healthy effector T cells such as TIL are highly glycolytic, relying on aerobic ysis to provide the bioenergetics substrates they require for proliferation, migration, activation, and anti-tumor cy.

In addition, these expanded cell populations can be eserved, leading to ease of use, long-term storage for multiple reinfusions into patients with recurrent disease, and other considerations. However, current infusion acceptance parameters rely on readouts of the composition of TILs and on fold-expansion and viability of the expanded TIL based product, These measures give little insight into the health of the TIL that will be infused into the t, and little is known about the effects of eservation on TIL populations. ingly, the t invention is directed to methods for expanding and re- stimulating TIL populations that lead to improved phenotype and increased metabolic health of the TILs and towards methods of assaying for TIL populations to determine suitability for more cious infusion after re-stimulation.

BRIEF SUMMARY OF THE INVENTION The present invention provides methods for expanding TILs in larger, sometimes therapeutic, populations in combination with optional cryopreservation.

According to the present sure, a method for expanding tumor infiltrating lymphocytes (TILs) into a therapeutic population of TILs comprising the following steps is provided: (i) ing a first population of TILs from a tumor resected from a patient; (ii) performing a first expansion by ing the first population of TILs in a cell culture medium comprising IL—2 to produce a second population of TILs, and (iii) performing a second expansion by menting the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold or lOO-fold greater in number than the second population of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic tion of TlLs which ses an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs.

In some embodiments, the method further ses: (iv) performing an onal second expansion by supplementing the cell culture medium of the third population of TILs with additional IL-2, additional OKT-3, and additional APCs, wherein the additional second expansion is performed for at least 14 days to obtain a larger therapeutic population of TILs than obtained in step (iii), wherein the larger therapeutic population of TILs comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the third population of TILs.

In some embodiments, after step (iii), the cells are removed from the cell culture and cryopreserved in a storage medium prior to performing step (iv).

In some ments, the cells are thawed prior to performing step (iv).

In some embodiments, step (iv) is repeated one to four times in order to obtain sufficient TlLs in the therapeutic population of TILs for a therapeutically effective dosage of the TILs.

In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 40 days to about 50 days. In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 42 days to about 48 days. In some ments, steps (i) through (iii) or (iv) are performed within a period of about 42 days to about 45 days. In some embodiments, steps (i) h (iii) or (iv) are performed within about 44 days.

In some embodiments, the cells from steps (iii) or (iv) express CD4, CD8, and TCR 0t [3 at levels similar to freshly harvested cells.

In some embodiments, the antigen presenting cells are peripheral blood mononuclear cells (PBMCs). In some embodiments, the PBMCs are added to the cell culture on any of days 9 through 17 in step (iii).

In some embodiments, the effector T cells and/or central memory T cells in the therapeutic population of TILs in step (iv) t one or more characteristics selected from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 sion, and decreased CD56 expression, relative to effector T cells and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit sed CD57 expression and sed CD56 expression.

In some embodiments, the APCs are artificial APCs (aAPCs).

In some embodiments, the method further comprises the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a high- affinity T cell receptor.

In some embodiments, the method further comprises the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a chimeric antigen receptor (CAR) comprising a single chain variable nt antibody fused with at least one endodomain of a T-cell signaling molecule.

In some embodiments, the therapeutic population of TILs are infused into a patient.

In some embodiments, step (iii) further comprises a step of removing the cells from the cell e medium.

In some embodiments, step (iii) is repeated one to four times in order to obtain sufficient TILs in the therapeutic population of TILs for a eutically effective dosage of the TILs.

In some embodiments, the number of TILs sufficient for a therapeutically effective dosage is from about 2.3X1010 to about 13.7X1010.

The present sure also provides a population of expanded TILs made according to the method of claim 1.

The present disclosure also provides a population of expanded TILs made according to the method of claim 1, wherein the ed TILs have at least a two—fold increase in basal glycolysis as compared to thawed cryopreserved TILs.

The present disclosure also es methods for ing the metabolic activity of a TIL cell population made according to the methods described herein, comprising measuring the basal ysis of the cells.

The present disclosure also provides methods for assessing the metabolic activity of a TIL cell population made according to the methods described herein, comprising measuring the basal respiration of the cells.

The present disclosure also provides methods for assessing the metabolic activity of a TIL cell population made according to the methods described herein, comprising measuring the spare respiratory ty (SRC) of the cells.

The present disclosure also provides methods for ing the metabolic activity of a TIL cell population made according to the methods described herein, comprising measuring the glycolytic reserve of the cells.

The present disclosure also provides a method for expanding tumor infiltrating lymphocytes (TILs) into a therapeutic tion of TILs comprising: (i) performing a first expansion by ing a first population of TILs from a tumor resected from a patient in a cell culture medium comprising IL-2 to obtain a second tion of TILs, and (ii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs) to obtain a third population of TILs, wherein the third population of TILs is at least 50-fold or lOO-fold greater in number than the second population of TILs, and wherein the second expansion is med for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic population of TILs which comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs.

In some embodiments, the method further comprises: (iii) performing an additional second expansion of the third population of TILs by supplementing the cell culture medium of the third tion of TILs with additional IL-2, onal OKT-3, and additional APCs, wherein the additional second expansion is performed for at least 14 days to obtain a larger therapeutic population of TILs than obtained in step (ii), wherein the larger therapeutic population of TILs exhibits an increased subpopulation of effector T cells and/or central memory T cells relative to the third tion of TILs.

In some embodiments, the cells from the cell culture medium in step (ii) are removed and cryopreserved in a e medium prior to step (iii).

In some embodiments, the cells are thawed prior to step (iii).

In some embodiments, step (ii) is repeated one to four times in order to obtain sufficient TILs in the therapeutic population of TILs for a therapeutically effective dosage of the TILs.

In some embodiments, the number of TILs ent for a therapeutically effective dosage is from about 2.3 >< 1010 to about l3.7><1010.

In some embodiments, the APCs are eral blood mononuclear cells (PBMCs).

In some embodiments, the effector T cells and/or central memory T cells exhibit one or more characteristics selected from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and sed CD56 expression, relative to effector T cells and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 sion and sed CD56 expression.

The present disclosure also provides a method for ng a subject with cancer sing administering expanded tumor infiltrating lymphocytes (TILs) comprising: (i) obtaining a first population of TlLs from a tumor resected from a patient, (ii) performing a first expansion by culturing the first population of TILs in a cell culture medium comprising IL—2 to produce a second population of TILs, (iii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold or lOO-fold greater in number than the second population of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic population of TILs which comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs, and (iv) stering a therapeutically effective dosage of the third population of TILs to the patient.

In some embodiments, the method further comprises prior to step (iv) a step of performing an additional second expansion by supplementing the cell culture medium of the third tion of TILs with onal IL—2, additional OKT—3, and additional APCs, wherein the additional second expansion is performed for at least 14 days to obtain a larger therapeutic population of TILs than obtained in step (iii), wherein the larger therapeutic population of TILs comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the third population of TILs.

In some ments, after step (ii) the cells are removed from the cell e medium and cryopreserved in a storage medium prior to the additional second expansion according to the methods described herein.

In some embodiments, the cells are thawed prior to the additional second expansion of according to the methods described herein.

In some embodiments, step (iii) is repeated one to four times in order to obtain sufficient TILs in the therapeutic population of TILs for a therapeutically effective dosage of the TILs.

In some embodiments, the number of TILs sufficient for a therapeutically effective dosage is from about 2.3 X 1010 to about 13.7X1010.

In some embodiments, the APCs are peripheral blood mononuclear cells (PBMCs).

In some embodiments, the or T cells and/or central memory T cells exhibit one or more characteristics selected from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and decreased CD56 expression, relative to effector T cells and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 sion and sed CD56 expression.

In some embodiments, the cancer is selected from the group consisting of melanoma, cervical cancer, head and neck cancer, astoma, ovaiian cancer, sarcoma, pancreatic cancer, bladder cancer, breast cancer, triple negative breast cancer, and non-small cell lung carcinoma.

The present disclosure also provides a method for treating a t with cancer sing administering expanded tumor ating lymphocytes (TILs) comprising: (i) ming a first expansion by culturing a first population of TILs from a tumor resected from a patient in a cell culture medium comprising IL-2 to obtain a second population of TILs, (ii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCS) to obtain a third population of TILs, wherein the third population of TILs is at least 50-fold or lOO-fold greater in number than the second population of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic population of TILs which ses an sed subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs; and (iii) administering a therapeutically effective dosage of the therapeutic population of TILs to the t.

In some embodiments, the method further comprises prior to step (iii) a step of performing an additional second expansion by supplementing the cell culture medium of the third population of TILs with additional IL-2, additional OKT-3, and additional APCs, wherein the additional second expansion is performed for at least 14 days to obtain a larger therapeutic population of TILs than obtained in step (ii), wherein the larger therapeutic population of TILs comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the third population of TILs.

In some embodiments, the cells from the cell culture medium in step (ii) are d and cryopreserved in a e medium prior to the additional second ion as described herein.

In some embodiments, the cells are thawed prior to the additional second expansion as described herein.

In some embodiments, step (ii) is ed one to four times in order to obtain ent TILs in the therapeutic population of TILs for a eutically effective dosage of the TILs.

In some embodiments, the number of TILs sufficient for a therapeutically effective dosage is from about 2.3 X 1010 to about 13.7X1010.

In some embodiments, the APCS are peripheral blood mononuclear cells (PBMCS).

In some ments, the effector T cells and/or central memory T cells exhibit one or more characteristics selected from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and decreased CD56 expression, relative to effector T cells and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

In some embodiments, the cancer is selected from the group consisting of melanoma, cervical cancer, head and neck cancer, glioblastoma, n cancer, sarcoma, pancreatic cancer, bladder cancer, breast cancer, triple ve breast cancer, and all cell lung oma.

The present invention also provides assay methods for determining TIL ity.

The present disclosure provides methods for assaying TILs for viability by expanding tumor infiltrating lymphocytes (TILs) into a larger population of TILs comprising: (i) obtaining a first population of TILs which has been previously expanded; (ii) performing a first expansion by culturing the first population of TILs in a cell culture medium comprising IL-2 to produce a second population of TILs; and (iii) performing a second expansion by menting the cell culture medium of the second population of TILs with additional IL—2, OKT—3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold or lOO-fold greater in number than the second population of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs comprises an sed subpopulation of effector T cells and/or central memory T cells ve to the second tion of TILs, and wherein the third population is further assayed for viability.

In some embodiments, the method further comprises: (iv) performing an additional second expansion by supplementing the cell culture medium of the third population of TILs with additional IL-2, additional OKT-3, and onal APCs, wherein the additional second expansion is performed for at least 14 days to obtain a larger population of TILs than obtained in step (iii), wherein the larger population of TILs ses an increased subpopulation of effector T cells and/or central memory T cells relative to the third population of TILs, and wherein the third tion is further assayed for viability.

In some embodiments, prior to step (i), the cells are cryopreserved.

In some embodiments, the cells are thawed prior to performing step (i).

In some embodiments, step (iv) is repeated one to four times in order to obtain sufficient TILs for analysis.

In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 40 days to about 50 days.

In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 42 days to about 48 days.

In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 42 days to about 45 days.

In some embodiments, steps (i) through (iii) or (iv) are med within about 44 days.

In some embodiments, the cells from steps (iii) or (iv) express CD4, CD8, and TCR 0t B at levels similar to y harvested cells.

In some embodiments, the antigen presenting cells are peripheral blood mononuclear cells (PBMCs).

In some embodiments, the PBMCs are added to the cell culture on any of days 9 h 17 in step (iii).

In some embodiments, the effector T cells and/or l memory T cells in the larger population of TILs in step (iv) exhibit one or more characteristics selected from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and decreased CD56 expression, relative to effector T cells, and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

In some embodiments, the APCs are artificial APCs (aAPCs).

In some embodiments, the method further comprises the step of transducing the first tion of TILs with an expression vector comprising a nucleic acid encoding a highaffinity T cell or.

In some embodiments, the step of transducing occurs before step (i).

WO 81473 In some embodiments, the method further comprises the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a chimeric antigen receptor (CAR) sing a single chain variable fragment antibody fused with at least one endodomain of a T-cell signaling molecule.

In some embodiments, the step of transducing occurs before step (i).

In some embodiments, the TILs are assayed for viability.

In some embodiments, the TILs are assayed for viability after cryopreservation.

In some embodiments, the TILs are assayed for viability after cryopreservation and after step (iv).

According to the present disclosure, a method for assaying TILs for viability and/or further use in stration to a subject. In some embodiments, the method for assay tumor infiltratitng lymphocytes (TILs) comprises: (i) obtaining a first population of TILs; (ii) performing a first expansion by ing the first population of TILs in a cell culture medium sing IL—2 to produce a second population of TILs, and (iii) ming a second expansion by supplementing the cell e medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold greater in number than the second population of TILs, (iv) ting, washing, and cryopreserving the third population of TILs; (v) storing the cryopreserved TILs at a cryogenic temperature, (vi) thawing the third population of TILs to provide a thawed third population of TILs, and (vii) performing an additional second expansion of a portion of the thawed third tion of TILs by menting the cell culture medium of the third population with IL-2, OKT-3, and APCs for a reREP period of at least 3 days, wherein the third expansion is performed to obtain a fourth population of TILs, wherein the number of TILs in the fourth population of TILs is compared to the number of TILs in the third population of TILs to obtain a ratio; (viii) determining based on the ratio in step (vii) whether the thawed population of TILs is suitable for administration to a patient; (ix) administering a therapeutically effective dosage of the thawed third population of TILs to the patient when the ratio of the number of TILs in the fourth population of TILs to the number of TILs in the third population of TILs is determined to be greater than 5:1 in step (viii).

In some embodiments, the reREP period is med until the ratio of the number of TILs in the fourth population of TILs to the number of TILs in the third population of TILs is greater than 50:1.

In some embodiments, the number of TILs sufficient for a therapeutically effective dosage is from about 2.3X1010 to about l3.7><1010.

In some embodiments, steps (i) h (vii) are performed within a period of about 40 days to about 50 days. In some embodiments, steps (i) through (vii) are performed within a period of about 42 days to about 48 days. In some embodiments, steps (i) through (vii) are performed within a period of about 42 days to about 45 days. In some embodiments, steps (i) through (vii) are med within about 44 days.

In some embodiments, the cells from steps (iii) or (vii) s CD4, CD8, and TCR 0t B at levels similar to freshly ted cells. In some embodiments the cells are TILs.

In some embodiments, the n presenting cells are peripheral blood mononuclear cells (PBMCs). In some ments, the PBMCs are added to the cell culture on any of days 9 through 17 in step (iii).

In some embodiments, the effector T cells and/or central memory T cells in the larger population of TILs in steps (iii) or (vii) exhibit one or more characteristics selected from the group consisting of expression of CD27, expression of CD28, longer res, increased CD57 expression, and decreased CD56 expression, relative to effector T cells, and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

In some embodiments, the APCs are artificial APCs (aAPCs).

In some embodiments, the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a high-affinity T cell receptor.

In some embodiments, the step of transducing occurs before step (i).

In some embodiments, the step of transducing the first population of TILs with an expression vector comprising a nucleic acid ng a chimeric antigen receptor (CAR) comprising a single chain variable nt antibody fused with at least one endodomain of a T-cell signaling le.

In some embodiments, the step of transducing occurs before step (i).

In some embodiments, the TILs are assayed for viability after step (vii).

The present disclosure also es further methods for assaying TILs. In some embodiments, the disclosure provides a method for assaying TILs comprising: (i) obtaining a portion of a first tion of eserved TILs, (ii) thawing the portion of the first tion of cryopreserved TILs, (iii) performing a first expansion by culturing the portion of the first population of TILs in a cell culture medium comprising lL-2, OKT-3, and antigen presenting cells (APCs) for a reREP period of at least 3 days, to produce a second population of TILs, wherein the portion from the first population of TILs is compared to the second population of TILs to obtain a ratio of the number of TILs, wherein the ratio of the number of TILs in the second population of TILs to the number of TILs in the n of the first population of TILs is greater than 5: 1, (iv) determining based on the ratio in step (iii) whether the first population of TILs is suitable for use in therapeutic administration to a patient, (v) determining the first population of TILs is suitable for use in eutic administration when the ratio of the number of TILs in the second tion of TILs to the number of TILs in the first population of TILs is determined to be greater than :1 in step (iv).

In some embodiments, the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 50:1.

In some embodiments, the method further comprises performing expansion of the entire first population of cryopreserved TILs from step (i) according to the methods as described in any of the embodiments provided herein.

In some embodiments, the method further comprises stering the entire first population of cryopreserved TILs from step (i) to the patient.

The present disclosure also provides further methods for ng TILs. In some embodiments, the disclosure provides a method for assaying TILs comprising: (i) obtaining a portion of a first population of cryopreserved TILs; (ii) g the portion of the first population of cryopreserved TILs; (iii) performing a first expansion by culturing the portion of the first population of TILs in a cell culture medium sing 1L-2, OKT-3, and antigen presenting cells (APCs) for a reREP period of at least 3 days, to produce a second population of TILs, wherein the portion from the first population of TILs is ed to the second population of TILs to obtain a ratio of the number of TILs, wherein the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 5:1, (iv) determining based on the ratio in step (iii) whether the first population of TILs is suitable for use in therapeutic administration to a patient; and (v) therapeutically administering the der of the first population of TILs to the patient when the ratio of the number of TILs in the second population of TILs to the number of TILs in the first tion of TILs is determined to be greater than 5:1 in step (iv).

In some embodiments, the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 50:1.

In some embodiments, the method further comprises performing ion of the entire first population of cryopreserved TILs from step (i) according to the methods of any of the preceding claims.

In some embodiments, the method further comprises administering the entire first population of cryopreserved TILs from step (i) to the patient.

In some embodiments, the method further sed the step of assessing the metabolic health of the second population of TILs.

] In some embodiments, the method further comprises the step of assessing the phenotype of the second population of TILs.

WO 81473 In some embodiments, the antigen presenting cells are allogeneic peripherial blood mononuclear cells.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1: Shows the results from Example 1. As the Table shows, following the antigen restimulation rapid expansion protocol (“reREP”), the TILs exhibit a marked enhancement in their glycolytic respiration. SRC = spare respiratory ty.

Figure 2: Composition of fresh vs. thawed TIL. TIL were stained for TCROLB and CD56 to define T-cell and NK tions. The data shown are averages of 6 individual TILs.

Figure 3: Memory ype is defined by CD45RA and CCR7 Expression. CD4 and CD8 TIL are mainly Effector Memory (EM) This remains the same in the thawed TIL.

Each point is one sample analyzed. No significant difference is found in a Wilcoxon d-pairs signed rank test.

Figure 4: Pearson’s correlation of CD4, CD8, CD4+CD28+, and CD8+CD28+ frequency between fresh and thawed TIL. Cells were stained with above markers. Each dot represents one dual with the fresh value on the x axis and the thawed value on the y axis. The fit line was drawn using linear regression analysis.

Figure 5: Comparable Activation Markers on Fresh and Thawed TILs. No significant difference in activation status of fresh vs. thawed TIL was found using a Wilcoxon Matched-Pairs Rank Test. Each point ents one sample analyzed and is shown as mean +/- SEM.

Figure 6: Maintenance of LAG-3 Staining Following Cryopreservation and Thaw.

A: LAG-3 staining of CD8 TIL. B: % frequency of regulatory molecules of the CD4 and CD8 populations on fresh and thawed TIL. CD8+TIM-3+ and CD8+LAG—3+ thawed TIL have a lower % than fresh TIL. hitney statistical test.

Figure 7: Remarkably stable tumor-infiltrating lymphocytes (TIL) for infusion phenotype following cryopreservation.

Figure 8: Scatter plot showing phenotypic characterization of reREP TILs. Q1 shows 19.0% CD45RA+/CCR7'; Q2 shows 0.066% CD45RA+/CCR7+; Q4 shows 80.6% CD45RA'/CCR7', and Q3 shows 0.36% CD45RA'/CCR7+, Figure 9: Diagram and data showing the phenotypic terization of reREP TILs, during the first and second expansion phases 0.08% CD45RA+/CCR7', 0.03% CD45RA+/CCR7+, 73.97% CD45RA'/CCR7'; and 25.91% CD45RA'/CCR7+ at Day 14, after the first expansion but prior to the second expansion. Proliferation of CM or EM TIL in the repeat ReREP. Central Memory (CM) TIL and Effector Memory (EM) TIL were tested for the proliferation capacity using repeat ReREP. Briefly, 1.3 x 106 Post REP TIL were co- culture with 1.3 x 107 PBMC feeders (CFSE labelled), OKT3 (30 ng/nl) and rhIL-2 (3000 IU/ml), culture was incubated for 14 days. On Day 14, l memory TIL and effector memory TIL were gated for L/D Aqua-/CF SE-/TCROt/B +/CD45RA-/CCR7+ and L/D Aqua- /CF SE—/TCR0L/B +/CD45RA—/CCR7— population respectively and flow cytometry sorted.

Purity of the cell tion was 97%. 1 x 104 flow sorted CM or EM or unsorted TIL were then cultured 1 x 106 PBMC s, OKT3 (30 ng/nl) and IL-2 (3 000 IU/ml) in triplicates for 7 days. Cell were counted and recorded. l memory TIL were more proliferative when compared to Effector memory TIL. We are repeating this experiment with more post REP TIL lines.

Figure 10A and 10B: Phenotypic terization of TILS during ReREP. Cells were gated on Aqua-/TCR a/B+/CD4+ or CD8+ to show Central Memory TILs (CD45RA' CCR7+) or Effector Memory TILs A'CCR7') memory phenotype. Student “t” was used to ate statistical significance. >“p < 0.05, ns non-significant.

] Figure 11: Exemplary schematic of the TIL preparation process, sometimes referred to herein as the 1C process.

Figure 12: Successful expansion of TILs from non-melanoma tumors. Data shows the distribution of TIL (CD4+/CD8+) in non-melanoma tumors.

Figure 13: Non-melanoma TILs expressed CD27 and CD3 8, consistent with young TILs.

Figure 14: Activated TILs skew towards effector memory tion.

Figure 15: Fresh versus reREP TIL phenotypes.

DETAILED DESCRIPTION OF THE ION 1. Introduction ve cell therapy utilizing TILs cultured ex vivo by the Rapid Expansion Protocol (REP) has produced successful adoptive cell y following host immunosuppression in patients with melanoma. Current infusion ance parameters rely on readouts of the composition of TILs (e.g., CD28, CD8, or CD4 positivity) and on the cal folds of expansion and viability of the REP product.

Current REP protocols give little t into the health of the TIL that will be infused into the patient. T cells undergo a nd metabolic shift during the course of their maturation from naive to effector T cells (see Chang, et al., Nat. Immunol. 2016, 17, 364, hereby expressly incorporated in its entirety, and in particular for the discussion and markers of anaerobic and aerobic metabolism). For example, naive T cells rely on mitochondrial respiration to produce ATP, while mature, healthy effector T cells such as TIL are highly glycolytic, relying on aerobic glycolysis to provide the bioenergetics substrates they require for proliferation, ion, activation, and anti-tumor efficacy.

Previous papers report that limiting glycolysis and ing mitochondrial metabolism in TlLs prior to transfer is desirable as cells that are relying heavily on ysis will suffer nutrient deprivation upon ve transfer which results in a majority of the transferred cells dying. Thus, the art teaches that promoting mitochondrial metabolism might promote in vivo longevity and in fact suggests using tors of glycolysis before induction of the immune response. See Chang et a1. (Chang, et al., Nat. Immunol. 2016, 17(3 64), 574- The present invention is directed in preferred aspects to novel methods of augmenting REPS with an additional restimulation protocol, sometimes referred to herein as a “restimulation Rapid Expansion Protocol” or “reRE ”, which leads surprisingly to expanded memory T cell subsets, ing the central memory (CD45RA'CCR7+) or effector memory (CD45RA'CCR7') phenotypes, and/or to marked enhancement in the glycolytic respiration as compared to freshly harvested TILs or thawed cryopreserved TlLs for the restimulated TILs (sometimes referred to herein as “reTILs”). That is, by using a reREP procedure (126., a procedure comprising a first expansion and a second ion) on cryopreserved TILs, patients can receive highly lically active, healthy TILs, leading to more favorable outcomes.

WO 81473 The present invention is further directed in some embodiments to methods for evaluating and quantifying this increase in metabolic health. Thus, the present invention provides methods of assaying the relative health of a TIL population using one or more general evaluations of metabolism, including, but not limited to, rates and amounts of ysis, oxidative phosphorylation, spare atory capacity (SRC) and glycolytic reserve.

Furthermore, the present invention is further directed in some embodiments to methods for evaluating and quantifying this increase in metabolic health. Thus, the present invention provides methods of assaying the relative health of a TIL population using one or more l evaluations of metabolism, including, but not limited to, rates and amounts of glycolysis, oxidative phosphorylation, spare respiratory capacity (SRC), and glycolytic In addition, al additional evaluations include, but are not limited to, ATP production, mitochondrial mass and glucose uptake.

In some cases, the reREP cell population with increased metabolic health are infused into a patient as is lly known in the art.

II. Definitions ] By “tumor infiltrating cytes” or “TILs” herein is meant a population of cells originally obtained as white blood cells that have left the bloodstream of a subject and migrated into a tumor. TILs include, but are not limited to, CD8+ cytotoxic T cells (lymphocytes), Th1 and Thl7 CD4+ T cells, natural killer cells, dendritic cells and M1 macrophages. TILs include both primary and secondary TILs. “Primary TILs” are those that are obtained from patient tissue s as outlined herein (sometimes referred to as “freshly harvested”), and “secondary TILs” are any TIL cell tions that have been expanded or proliferated as discussed herein, including, but not limited to bulk TILs, expanded TILs (“REP TILs”) as well as “reREP TILs” as discussed herein.

TILs can generally be defined either biochemically, using cell surface markers, or onally, by their ability to rate tumors and effect ent. TILs can be generally categorized by sing one or more of the following biomarkers: CD4, CD8, TCR dB, CD27, CD28, CD56, CCR7, CD45Ra, CD95, PD—l, and CD25. Additionally, and alternatively, TILs can be functionally defined by their ability to infiltrate solid tumors upon reintroduction into a patient. TILS may further be characterized by potency — for example, TILS may be considered potent if, for example, interferon (IFN) release is greater than about 50 pg/mL, greater than about 100 pg/mL, greater than about 150 pg/mL, or r than about 200 pg/mL. Interferon can include interferon gamma (IFNy).

By “cryopreserved TILs” herein is meant that TILs, either primary, bulk, or expanded (REP TILs), are treated and stored in the range of about -lSO°C to -6OOC. General methods for cryopreservation are also described elsewhere herein, including in the es.

For clarity, “cryopreserved TILs” are distinguishable from frozen tissue samples which may be used as a source of primary TILs.

By “thawed cryopreserved TILs” herein is meant a population of TILs that was previously eserved and then treated to return to room temperature or higher, including but not limited to cell culture temperatures or temperatures wherein TILs may be administered to a patient.

By “population of cells” (including TILs) herein is meant a number of cells that share common . In general, populations generally range from 1 X 106 to 1 X 1010 in number, with different TIL populations comprising different s. For example, initial growth of primary TILs in the presence of IL-2 results in a population of bulk TILS of roughly 1 X 108 cells. REP expansion is generally done to provide populations of 1.5 X 109 to 1.5 X 1010 cells for infusion.

In general, TILs are initially obtained from a patient tumor sample (“primary TILs”) and then expanded into a larger population for r manipulation as described herein, optionally cryopreserved, restimulated as outlined herein and optionally evaluated for phenotype and metabolic parameters as an indication of TIL .

In general, the ted cell suspension is called a “primary cell population” or a “freshly harvested” cell population.

In general, as discussed herein, the TILs are lly prepared by obtaining a primary tion of TILs from a tumor resected from a patient as discussed herein (the “primary cell population” or “first cell tion”). This is ed with an initial bulk expansion utilizing a culturing of the cells with IL-2, forming a second population of cells (sometimes ed to herein as the “bulk TIL population” or “second population”).

The term “cytotoxic lymphocyte” includes cytotoxic T (CTL) cells (including CD8+ cytotoxic T lymphocytes and CD4+ T-helper lymphocytes), natural killer T (NKT) cells and natural killer (NK) cells. Cytotoxic lymphocytes can include, for example, peripheral blood- derived R-positive or a/BTCR-positive T cells activated by tumor associated antigens and/or transduced With tumor specific chimeric antigen receptors or T-cell receptors, and infiltrating lymphocytes (TILs).

The term “central memory T cell” refers to a subset of T cells that in the human are CD45RO+ and constitutively express CCR7 (CCR7 hi) and CD62L (CD62 hi). The surface phenotype of l memory T cells also includes TCR, CD3, CD127 (IL-7R), and IL-lSR.

Transcription factors for central memory T cells include BCL-6, BCL-6B, MBD2, and BMII.

Central memory T cells primarily secret IL-2 and CD4OL as effector molecules after TCR triggering. Central memory T cells are predominant in the CD4 compartment in blood, and in the human are proportionally enriched in lymph nodes and tonsils.

The term “effector memory T cell” refers to a subset of human or mammalian T cells that, like central memory T cells, are CD45RO+, but have lost the constitutive expression of CCR7 (CCR7lo) and are heterogeneous or low for CD62L expression (CD62Llo). The surface phenotype of central memory T cells also es TCR, CD3, CD127 (IL—7R), and IL—lSR. Transcription factors for central memory T cells e BLIMPl. or memory T cells rapidly secret high levels of inflammatory cytokines following antigenic stimulation, including interferon-y, IL-4, and lL-S. Effector memory T cells are predominant in the CD8 compartment in blood, and in the human are proportionally enriched in the lung, liver, and gut. CD8+ effector memory T cells carry large amounts of perforin. The term “closed system” refers to a system that is closed to the outside environment. Any closed system appropriate for cell culture s can be ed with the methods of the t invention. Closed systems include, for example, but are not limited to closed G—containers. Once a tumor segment is added to the closed system, the system is no opened to the outside nment until the TILs are ready to be administered to the patient.

The terms “peripheral blood mononuclear cells” and ” refers to a eral blood cell having a round nucleus, including lymphocytes (T cells, B cells, NK cells) and monocytes. Preferably, the peripheral blood mononuclear cells are irradiated allogeneic peripheral blood mononuclear cells.

The term “rapid expansion” means an increase in the number of antigen-specific TILs of at least about 3-fold (or 4-, 5-, 6-, 7-, 8-, or 9-fold) over a period of a week, more preferably at least about 10—fold (or 20—, 30—, 40—, 50—, 60—, 70—, 80—, or 90—fold) over a period of a week, or most preferably at least about lOO-fold over a period of a week. A number of rapid expansion protocols are described herein.

In some embodiments, methods of the present disclosure further include a “pre- REP” stage in which tumor tissue or cells from tumor tissue are grown in standard lab media ding without limitation RPMI) and treated the with reagents such as irradiated feeder cells and anti-CD3 antibodies to achieve a desired , such as increase in the number of TILS and/or an enrichment of the population for cells containing desired cell e markers or other structural, biochemical or functional features. The pre-REP stage may utilize lab grade reagents (under the assumption that the lab grade reagents get diluted out during a later REP stage), making it easier to incorporate alternative strategies for improving TIL production. Therefore, in some embodiments, the disclosed TLR t and/or peptide or peptidomimetics can be included in the culture medium during the pre-REP stage. The pre- REP e can in some embodiments, include IL—2.

The present invention is directed in red aspects to novel methods of augmenting REPs with an additional restimulation protocol, sometimes referred to herein as a “restimulation Rapid Expansion Protocol” or “reRE ”, which leads surprisingly to expanded memory T cell s, including the memory effector T cell subset, and/or to marked enhancement in the glycolytic respiration as compared to freshly harvested TILs or thawed cryopreserved TILs for the restimulated TILs (sometimes referred to herein as s”).

That is, by using a reREP procedure on cryopreserved TILs, patients can receive highly metabolically active, healthy TILs, leading to more favorable outcomes. Such restimulation protocols, also referred to herein as additional sions” of the cell populations, are described in further detail .

The terms “fragmenting,” ent,” and “fragmented,” as used herein to describe processes for disrupting a tumor, includes ical ntation methods such as crushing, slicing, dividing, and morcellating tumor tissue as well as any other method for disrupting the physical structure of tumor tissue. The term “in vivo” refers to an event that takes place in a subject's body.

The term “in vitro” refers to an event that takes places outside of a subject's body. In vitro assays encompass cell-based assays in which cells alive or dead are employed and may also ass a cell-free assay in which no intact cells are employed.

The term “anti-CD3 antibody” refers to an antibody or variant thereof, e. g., a monoclonal dy and including human, humanized, chimeric or murine antibodies which are directed against the CD3 receptor in the T cell antigen receptor of mature T cells. Anti- CD3 antibodies include OKT-3, also known as muromonab, and UCHT-l. Other D3 antibodies include, for example, otelixizumab, teplizumab, and visilizumab.

The term “OKT-3” (also referred to herein as “OKT3”) refers to a monoclonal antibody or biosimilar or variant f, including human, humanized, chimeric, or murine antibodies, ed against the CD3 receptor in the T cell antigen receptor of mature T cells, and includes commercially-available forms such as OKT-3 (30 ng/mL, MACS GMP CD3 pure, yi Biotech, Inc, San Diego, CA, USA) and muromonab or variants, conservative amino acid substitutions, glycoforms, or ilars thereof The amino acid sequences of the heavy and light chains of muromonab are given in Table 1 (SEQ ID N01 and SEQ ID NO:2). A hybridoma capable of producing OKT—3 is deposited with the American Type Culture Collection and assigned the ATCC accession number CRL 8001. A oma capable of producing OKT-3 is also deposited with European Collection of Authenticated Cell Cultures (ECACC) and assigned Catalogue No. 86022706.

TABLE 1. Amino acid ces of muromonab.

Sequence (One-Letter Amino Acid Symbols) SEQ ID N021 QVQLQQSGAE LARPGASVKM SC<ASGYTFT RYTMHWVKQR PGQGLEWIGY INPSRGYTNY Muromonab heavy NQKFKDKATL TTDKSSSTAY MQJSSLTSED SAVYYCARYY DDHYCLDYWG QGTTLTVSSA Chain KTTAPSVYPL APVCGGTTGS SVTLGCLVKG YFPEPVTLTW NSGSLSSGVH TFPAVLQSDL YTLSSSVTVT SSTWPSQSIT CNVAHPASST KVDKKIEPRP KSCDKTHTCP PCPAPELLGG PSVFLFPPKP KDTLMISRTP EVTCVVVDVS HEDPEVKFNW YVDGVEVHNA KTKPREEQYN SVLT VLHQDWLNGK EYKCKVSNKA LPAPIEKTIS KAKGQPREPQ VYTLPPSRDE LTKNQVSLTC LVKGFYPSDI AVEWESNGQP ENNYKTTPPV FFLY SKLTVDKSRW QQGNVFSCSV MHEALHNHYT SPGK SEQ ID NO:2 QIVLTQSPAI MSASPGEKVT MTCSASSSVS YMNWYQQKSG TSPKRWIYDT SKLASGVPAH Muromonab light FRGSGSGTSY SLTISGMEAE DAATYYCQQW SSNPFTFGSG TKLEINRADT APTVSIFPPS chain SEQLTSGGAS VVCFLNNFYP KDINVKWKID GSERQNGVLN SWTDQDSKDS TYSMSSTLTL TKDEYERHNS YTCEATHKTS TSPIVKSFNR NEC ] The term “IL-2” (also referred to herein as “IL2”) refers to the T cell growth factor known as interleukin-2, and includes all forms of IL-2 including human and mammalian forms, conservative amino acid substitutions, glycoforms, biosimilars, and variants f.

IL-2 is described, e.g., in Nelson, J. l. 2004, 172, 3983-88 and Malek, Annu. Rev.

Immunol. 2008, 26, 453-79, the disclosures of which are incorporated by reference .

The amino acid sequence of recombinant human IL-2 suitable for use in the invention is given in Table 2 (SEQ ID NO:3). For example, the term IL-2 encompasses human, inant forms of IL-2 such as aldesleukin (PROLEUKIN, available commercially from multiple suppliers in 22 million IU per single use vials), as well as the form of inant IL-2 commercially supplied by CellGeniX, Inc., Portsmouth, NH, USA (CELLGRO GMP) or ProSpec-Tany TechnoGene Ltd, East Brunswick, NJ, USA (Cat. No. CYTb) and other commercial equivalents from other vendors. Aldesleukin (des-alanyl-l, serine-125 human 1L- 2) is a nonglycosylated human recombinant form of IL-2 with a lar weight of approximately 15 kDa. The amino acid sequence of aldesleukin suitable for use in the ion is given in Table 2 (SEQ ID N04). The term IL-2 also encompasses pegylated forms of IL-2, as described herein, including the pegylated IL2 prodrug NKTR-214, available from Nektar Therapeutics, South San sco, CA, USA. NKTR-214 and pegylated IL-2 suitable for use in the invention is described in US. Patent Application ation No. US 328791 A1 and International Patent Application Publication No. the disclosures of which are incorporated by reference herein. Alternative forms of conjugated IL-2 suitable for use in the invention are described in U. S. Patent Nos. 4,766,106, ,206,344, 5,089,261 and 4902,502, the disclosures of which are incorporated by reference herein. Formulations of IL-2 suitable for use in the invention are described in US. Patent No. 6,706,289, the disclosure of which is incorporated by reference herein.

TABLE 2. Amino acid sequences of interleukins.

Identifier Sequence (One-Letter Amino Acid Symbols) SEQ ID NO:3 MAPTSSSTKK TQLQLEHLLJ DLQMILNGIN LTRM LTEKEYMPKK ATELKHLQCL recombinant EEELKPLEEV LNLAQSKNEI LRPRDLISNI NVIVLELKGS ETTEMCEYAD ETATIVEELN human ILi2 RWITECQSII STLT (rhILi2) SEQ ID NO:4 PTSSSTKKTQ LQLEHLLLDJ QMILNGINNY KNPKLTRMLT EKFYMPKKAT ELKHLQCLEE Aidesieukin ELKPLEEVLN LAQSKNEHLR PRDLISNINV IVLELKGSET TEMCEYADET ATIVEELNRW ITESQSIIST LT SEQ ID NO:5 MHKCDITLQE IIKTLNSLTE QKTLCTELTV SKNT TEKETECRAA TVLRQEYSHH recombinant EKDTRCLGAT AQQEHRHKQS IRELKRLDRN LWGLAGLNSC PVKEANQSTL LKTI human ILi4 MREKYSKCSS (rhIL74) SEQ ID N026 GKDG LMVS IDQLLDSMKE IGSNCLNNEF NFFKRHICDA NKEGMFLFRA recombinant ARKLRQELKM NSTGDEDLHu LKVSEGTTIL VKGR KPAALGEAQP TKSLEENKSL human ILi7 KEQKKLNDLC ELKRLLQEI< TCWNKILMGT KEH (rhIL77) SEQ ID NO:7 MNWVNVISDL KKIEDLIQSM HIDATLYTES DVHPSCKVTA MKCFLLELQV ISLESGDASI recombinant HDTVENLIIL ANNSLSSNGN KECE ELEEKNIKEE LQSEVHIVQM EINTS human ILelS (rhILilS) SEQ ID NO:8 MQDRHMIRMR DQLK VPEE LPAPEDVETN CEWSAESCEQ KAQLKSANTG recombinant NNERIINVSI KKLKRKPPST NAGRRQKHRL TCPSCDSYEK KPPKEELERF MIHQ human ILi2l HLSSRTHGSE DS (rhILi21) The term “IL-4” (also referred to herein as “IL4”) refers to the cytokine known as interleukin 4, which is produced by Th2 T cells and by eosinophils, basophils, and mast cells.

IL-4 regulates the differentiation of naive helper T cells (Th0 cells) to Th2 T cells. Steinke and Borish, Respir. Res. 2001, 2, 66-70. Upon tion by IL—4, Th2 T cells subsequently produce additional IL-4 in a positive feedback loop. IL—4 also stimulates B cell proliferation and class II MHC expression, and induces class ing to IgE and IgG1 expression from B cells Recombinant human IL-4 suitable for use in the invention is commercially available from multiple suppliers, including ProSpec-Tany TechnoGene Ltd., East Brunswick, NJ, USA (Cat. No. CYT-2l l) and ThermoFisher Scientific, Inc., Waltham, MA, USA (human IL-lS recombinant protein, Cat. No. Gibco CTP0043). The amino acid sequence of recombinant human IL—4 suitable for use in the invention is given in Table 2 (SEQ ID NO:5).

The term “IL-7” (also referred to herein as “IL7”) refers to a glycosylated tissue- derived cytokine known as interleukin 7, which may be obtained from stromal and epithelial cells, as well as from dendritic cells. Fry and Mackall, Blood 2002, 99, 04. IL-7 can stimulate the development of T cells. IL—7 binds to the IL-7 receptor, a heterodimer consisting of IL-7 receptor alpha and common gamma chain receptor, which in a series of signals ant for T cell development within the thymus and survival within the periphery.

Recombinant human IL-4 suitable for use in the invention is commercially available from multiple suppliers, including ProSpec-Tany TechnoGene Ltd, East Brunswick, NJ, USA (Cat. No. CYT—254) and ThermoFisher ific, Inc., Waltham, MA, USA (human IL-15 inant n, Cat. No. Gibco PHC0071). The amino acid sequence of recombinant human IL-7 suitable for use in the invention is given in Table 2 (SEQ ID NO:6).

The term “IL-15” (also referred to herein as “IL15”) refers to the T cell growth factor known as interleukin-15, and es all forms of IL-2 including human and mammalian forms, conservative amino acid tutions, glycoforms, ilars, and variants thereof. IL-15 is described, e.g., in Fehniger and Caligiuri, Blood 2001, 97, 14-32, the disclosure of which is incorporated by reference herein. IL-lS shares [3 and y signaling receptor ts with IL-2. Recombinant human IL-15 is a single, non-glycosylated polypeptide chain ning 114 amino acids (and an N-terminal methionine) with a lar mass of 12.8 kDa. Recombinant human IL-15 is commercially available from multiple suppliers, including ProSpec-Tany TechnoGene Ltd, East Brunswick, NJ, USA (Cat. No. CYTb) and ThermoFisher Scientific, Inc., Waltham, MA, USA (human IL-lS recombinant protein, Cat. No. 3482). The amino acid ce of recombinant human IL-15 suitable for use in the invention is given in Table 2 (SEQ ID NO:7).

The term “IL-21” (also referred to herein as “IL2l”) refers to the pleiotropic cytokine protein known as interleukin-21, and includes all forms of IL-21 ing human and mammalian forms, conservative amino acid substitutions, glycoforms, biosimilars, and variants thereof. IL-21 is described, e.g., in Spolski and Leonard, Nat. Rev. Drug. Disc. 2014, 13, 379-95, the disclosure of which is incorporated by reference herein. IL-21 is primarily produced by natural killer T cells and activated human CD4+ T cells. Recombinant human IL-21 is a single, non-glycosylated polypeptide chain containing 132 amino acids with a molecular mass of 15.4 kDa. Recombinant human IL-21 is commercially available from multiple suppliers, including ProSpec-Tany TechnoGene Ltd, East Brunswick, NJ, USA (Cat. No. CYTb) and ThermoFisher Scientific, Inc., Waltham, MA, USA (human IL-21 recombinant protein, Cat. No. 1480). The amino acid sequence of recombinant human IL-2l suitable for use in the ion is given in Table 2 (SEQ ID N08).

When “an anti-tumor effective amount77 (C an tumor-inhibiting effective amount”, or “therapeutic amount” is indicated, the precise amount of the compositions of the present invention to be administered can be determined by a physician with consideration of dual differences in age, weight, tumor size, extent of ion or metastasis, and condition of the patient (subject). It can generally be stated that a pharmaceutical composition comprising the genetically modified cytotoxic cytes described herein may be administered at a dosage of 104 to 1011 cells/kg body weight (e.g., 105 to 106, 105 to 1010, 105 to 10“, 106 to 1010, 106 to 1011,107 to 10“, 107 to 1010, 108 to 10“, 108 to 1010, 109 to 10“, or 109 to 1010 cells/kg body weight), including all integer values within those ranges.

Genetically modified cytotoxic lymphocytes itions may also be administered multiple times at these dosages. The genetically modified cytotoxic lymphocytes can be stered by using infusion techniques that are commonly known in immunotherapy (see, e.g., Rosenberg et al., New Eng. J. ofMed. 319: 1676, 1988). The optimal dosage and treatment regime for a particular patient can readily be determined by one skilled in the art of ne by monitoring the patient for signs of e and adjusting the treatment accordingly.

The term “hematological malignancy” refers to ian s and tumors of the poietic and lymphoid tissues, including but not limited to tissues of the blood, bone marrow, lymph nodes, and lymphatic . Hematological ancies are also ed to as “liquid tumors.” Hematological malignancies include, but are not limited to, acute lymphoblastic leukemia (ALL), chronic lymphocytic lymphoma (CLL), small lymphocytic lymphoma (SLL), acute myelogenous leukemia (AML), chronic myelogenous ia (CML), acute monocytic leukemia (AMoL), Hodgkin's lymphoma, and non- Hodgkin's lymphomas. The term “B cell hematological malignancy” refers to hematological malignancies that affect B cells.

] The term “solid tumor” refers to an abnormal mass of tissue that usually does not contain cysts or liquid areas. Solid tumors may be benign or malignant. The term “solid tumor cancer refers to malignant, neoplastic, or cancerous solid tumors. Solid tumor cancers include, but are not limited to, sarcomas, carcinomas, and lymphomas, such as cancers of the lung, breast, te, colon, rectum, and bladder. The tissue structure of solid tumors includes ependent tissue compartments including the hyma (cancer cells) and the supporting l cells in which the cancer cells are dispersed and which may provide a supporting microenvironment.

The term “liquid tumor” refers to an abnormal mass of cells that is fluid in nature.

Liquid tumor cancers e, but are not limited to, leukemias, myelomas, and lymphomas, as well as other hematological malignancies. TILs obtained from liquid tumors may also be referred to herein as marrow infiltrating lymphocytes (MILs).

The term “microenvironment,” as used herein, may refer to the solid or hematological tumor microenvironment as a whole or to an individual subset of cells within the microenvironment. The tumor microenvironment, as used herein, refers to a complex mixture of “cells, soluble s, signaling molecules, ellular matrices, and mechanical cues that e neoplastic transformation, support tumor growth and invasion, protect the tumor from host immunity, foster therapeutic resistance, and provide niches for dominant metastases to thrive,” as described in Swartz, et al, Cancer Res, 2012, 72, 2473. Although tumors express antigens that should be recognized by T cells, tumor nce by the immune system is rare because of immune ssion by the microenvironment.

In an embodiment, the invention includes a method of treating a cancer with a population of rTILs, wherein a patient is pre-treated with non-myeloablative chemotherapy prior to an infusion of rTILs according to the invention. In some embodiments, the population of rTILs may be provided with a population of eTils, wherein a patient is pre-treated with nonmyeloablative chemotherapy prior to an infusion of rTILs and eTils according to the invention. In an embodiment, the non-myeloablative chemotherapy is hosphamide 60 mg/kg/d for 2 days (days 27 and 26 prior to rTIL infusion) and bine 25 mg/m2/d for 5 days (days 27 to 23 prior to rTIL infusion). In an embodiment, after non-myeloablative chemotherapy and rTlL infusion (at day 0) according to the invention, the patient receives an intravenous infusion of IL-2 intravenously at 720,000 IU/kg every 8 hours to physiologic tolerance.

Experimental s indicate that lymphodepletion prior to adoptive transfer of tumor-specific T lymphocytes plays a key role in enhancing treatment y by eliminating regulatory T cells and competing elements of the immune system (“cytokine sinks”).

Accordingly, some embodiments of the invention utilize a lymphodepletion step (sometimes also referred to as “immunosuppressive conditioning”) on the t prior to the introduction of the rTILs of the invention.

The terms “co-administration, 77 cc co-administering, )7 (C administered in combination with,” “administering in combination with,” “simultaneous,” and “concurrent,” as used herein, encompass administration of two or more active pharmaceutical ingredients (in a preferred embodiment of the present invention, for example, at least one potassium channel agonist in combination with a plurality of TILs) to a subject so that both active pharmaceutical ingredients and/or their metabolites are present in the subject at the same time. Co—administration includes simultaneous administration in separate compositions, administration at different times in separate compositions, or administration in a composition in which two or more active pharmaceutical ingredients are present. Simultaneous administration in separate compositions and administration in a ition in which both agents are present are preferred.

The term “effective amount” or “therapeutically effective amount” refers to that amount of a compound or combination of compounds as described herein that is sufficient to effect the intended application including, but not limited to, disease ent. A therapeutically effective amount may vary depending upon the intended ation (in vitro or in vivo), or the subject and disease condition being treated (e.g, the , age and gender of the subject), the severity of the disease condition, or the manner of stration.

The term also applies to a dose that will induce a particular response in target cells (e.g., the reduction of platelet adhesion and/or cell migration). The specific dose will vary depending on the particular compounds chosen, the dosing regimen to be followed, whether the compound is administered in combination with other compounds, timing of stration, the tissue to which it is stered, and the physical delivery system in which the compound is carried.

The terms “treatment”, “treating”, “treat”, and the like, refer to obtaining a desired pharmacologic and/or physiologic . The effect may be lactic in terms of completely or partially ting a disease or symptom thereof and/or may be eutic in terms of a partial or complete cure for a disease and/or adverse effect attributable to the disease. “Treatment”, as used herein, covers any treatment of a disease in a , ularly in a human, and includes: (a) ting the disease from ing in a subject which may be predisposed to the disease but has not yet been diagnosed as having it, (b) inhibiting the disease, i.e., arresting its development or progression; and (c) relieving the disease, i.e., causing regression of the disease and/or relieving one or more disease symptoms. “Treatment” is also meant to encompass delivery of an agent in order to provide for a pharmacologic effect, even in the absence of a e or condition. For example, “treatment” encompasses delivery of a composition that can elicit an immune response or confer immunity in the absence of a disease condition, e.g., in the case of a e.

The term “heterologous” when used with reference to ns of a nucleic acid or n indicates that the nucleic acid or protein comprises two or more subsequences that are not found in the same relationship to each other in nature. For ce, the nucleic acid is lly recombinantly produced, having two or more ces from unrelated genes arranged to make a new functional nucleic acid, e.g., a promoter from one source and a coding region from another source, or coding regions from different sources. Similarly, a heterologous protein indicates that the protein comprises two or more subsequences that are not found in the same relationship to each other in nature (e. g., a fusion protein).

The terms “sequence identity, 77 capercent identity,” and “sequence percent identity” (or synonyms thereof, e.g., “99% identical”) in the context of two or more nucleic acids or polypeptides, refer to two or more sequences or subsequences that are the same or have a specified percentage of nucleotides or amino acid residues that are the same, when compared and aligned (introducing gaps, if necessary) for maximum pondence, not considering any conservative amino acid tutions as part of the sequence identity. The percent identity can be measured using sequence comparison re or algorithms or by visual inspection. Various thms and software are known in the art that can be used to obtain alignments of amino acid or nucleotide sequences. Suitable programs to determine percent sequence identity include for example the BLAST suite of programs available from the U. S.

Government’ 5 National Center for Biotechnology Information BLAST web site.

Comparisons between two sequences can be carried using either the BLASTN or BLASTP algorithm. BLASTN is used to compare nucleic acid sequences, while BLASTP is used to compare amino acid sequences. ALIGN, ALIGN-Z (Genentech, South San Francisco, California) or MegAlign, available from DNASTAR, are additional publicly available software programs that can be used to align sequences. One d in the art can determine appropriate parameters for maximal alignment by particular alignment software. In certain embodiments, the default parameters of the alignment re are used.

As used herein, the term “variant” encompasses but is not d to antibodies or fusion ns which comprise an amino acid sequence which differs from the amino acid sequence of a reference antibody by way of one or more substitutions, deletions and/or additions at certain positions within or nt to the amino acid sequence of the reference antibody. The variant may comprise one or more vative tutions in its amino acid sequence as compared to the amino acid sequence of a reference antibody. Conservative substitutions may involve, e. g., the substitution of similarly charged or uncharged amino acids. The variant retains the ability to specifically bind to the antigen of the reference antibody. The term variant also includes pegylated antibodies or proteins.

The term “in viva” refers to an event that takes place in a subject's body.

The term “in vitro” refers to an event that takes places outside of a subject's body. In vitro assays encompass cell-based assays in which cells alive or dead are employed and may also encompass a cell-free assay in which no intact cells are employed.

The term “rapid expansion” means an increase in the number of antigen-specific TILs of at least about 3-fold (or 4-, 5-, 6-, 7-, 8-, or ) over a period of a week, more preferably at least about 10-fold (or 20-, 30-, 40-, 50-, 60-, 70-, 80-, or d) over a period of a week, or most preferably at least about lOO-fold over a period of a week. A number of rapid expansion protocols are outlined below.

III. Restimulation of Cyropreserved TILs As sed herein, the t ion relates to the restimulation of cryopreserved TILs to increase their metabolic activity and thus relative health prior to transplant into a patient, and methods of testing said metabolic health. As generally outlined herein, TILs are generally taken from a patient sample and manipulated to expand their number prior to transplant into a patient. In some embodiments, the TILs may be optionally genetically manipulated as discussed below, and then cryopreserved. Once thawed, they are then restimulated to increase their metabolism prior to infusion into a t.

The “Step” Designations A, B, C, etc, below are in reference to Figure 11. The ng of the Steps below and in Figure 11 is exemplary and any combination or order of steps, as well as additional steps, repetition of steps, and/or omission of steps is contemplated by the present application and the methods disclosed herein.

A. STEP A: Obtain Patient Tumor Sample In general, TILs are initially obtained from a patient tumor sample (“primary TILs”) and then expanded into a larger population for further manipulation as bed herein, optionally eserved, restimulated as outlined herein and optionally evaluated for phenotype and metabolic parameters as an indication of TIL health.

A patient tumor sample may be ed using methods known in the art, lly via surgical resection, needle biopsy or other means for obtaining a sample that contains a mixture of tumor and TIL cells. In general, the tumor sample may be from any solid tumor, including y tumors, invasive tumors or metastatic tumors. The tumor sample may also be a liquid tumor, such as a tumor ed from a hematological malignancy. The solid tumor may be of any cancer type, including, but not limited to, breast, pancreatic, prostate, colorectal, lung, brain, renal, stomach, and skin (including but not limited to squamous cell carcinoma, basal cell carcinoma, and melanoma). In some embodiments, useful TILs are ed from malignant melanoma tumors, as these have been reported to have particularly high levels of TILs.

The term “solid tumor” refers to an abnormal mass of tissue that y does not contain cysts or liquid areas. Solid tumors may be benign or malignant. The term “solid tumor cancer refers to malignant, neoplastic, or cancerous solid tumors. Solid tumor cancers include, but are not limited to, sarcomas, carcinomas, and lymphomas, such as cancers of the lung, breast, triple negative breast , prostate, colon, rectum, and bladder. In some embodiments, the cancer is selected from cervical cancer, head and neck cancer, astoma, ovarian cancer, sarcoma, pancreatic cancer, r cancer, breast cancer, triple negative breast cancer, and non-small cell lung carcinoma. The tissue structure of solid tumors includes interdependent tissue compartments including the parenchyma (cancer cells) and the supporting stromal cells in which the cancer cells are dispersed and which may provide a supporting microenvironment.

The term “hematological malignancy” refers to mammalian cancers and tumors of the hematopoietic and lymphoid s, including but not limited to s of the blood, bone marrow, lymph nodes, and lymphatic system. Hematological malignancies are also referred to as “liquid tumors.” Hematological malignancies include, but are not d to, acute lymphoblastic leukemia (ALL), c lymphocytic lymphoma (CLL), small cytic lymphoma (SLL), acute myelogenous leukemia (AML), chronic myelogenous leukemia (CML), acute monocytic leukemia , Hodgkin's lymphoma, and non- Hodgkin's lymphomas. The term “B cell hematological malignancy” refers to hematological malignancies that affect B cells.

Once obtained, the tumor sample is generally fragmented using sharp dissection into small pieces of between 1 to about 8 mm3, with from about 2-3 mm3 being particularly useful. The TILs are cultured from these fragments using enzymatic tumor digests. Such tumor digests may be produced by incubation in enzymatic media (e.g, Roswell Park Memorial Institute (RPMI) 1640 buffer, 2 mM glutamate, lO mcg/mL gentamicine, 30 units/mL of DNase and 1.0 mg/mL of collagenase) followed by mechanical dissociation (e.g., using a tissue dissociator). Tumor digests may be produced by placing the tumor in enzymatic media and mechanically dissociating the tumor for approximately 1 minute, followed by incubation for 30 minutes at 37 °C in 5% C02, followed by repeated cycles of mechanical dissociation and incubation under the foregoing conditions until only small tissue pieces are present. At the end of this s, if the cell suspension contains a large number of red blood cells or dead cells, a y gradient separation using FICOLL branched hydrophilic polysaccharide may be performed to remove these cells. ative methods known in the art may be used, such as those described in US. Patent Application Publication No. 2012/0244133 Al, the disclosure of which is incorporated by reference herein. Any of the foregoing methods may be used in any of the ments described herein for methods of expanding TILs or methods treating a .

In some embodiments, fragmentation includes physical fragmentation, including for example, dissection as well as digestion. In some embodiments, the fragmentation is physical fragmentation. In some embodiments, the fragmentation is dissection. In some ments, the fragmentation is by digestion. In some embodiments, TILs can be lly cultured from enzymatic tumor digests and tumor fragments obtained from ts.

In some embodiments, where the tumor is a solid tumor, the tumor undergoes physical fragmentation after the tumor sample is obtained, for example such as in Step A of Figure 11. In some embodiments, the ntation occurs before cryopreservation. In some ments, the fragmentation occurs after cryopreservation. In some embodiments, the fragmentation occurs after obtaining the tumor and in the absence of any cryopreservation. In WO 81473 2017/058610 some embodiments, the tumor is fragmented and 2, 3, or 4 fragments or pieces are placed in each container for the first expansion. In some embodiments, the tumor is nted and 3 or 4 fragments or pieces are placed in each container for the first expansion. In some embodiments, the tumor is fragmented and 4 fragments or pieces are placed in each ner for the first expansion, In some embodiments, the TILs are obtained from tumor fragments. In some embodiments, the tumor fragment is obtained sharp dissection. In some embodiments, the tumor fragment is between about 1 mm3 and 10 mm3. In some embodiments, the tumor fragment is between about 1 mm3 and 8 mm3. In some embodiments, the tumor fragment is about 1 mm3. In some embodiments, the tumor fragment is about 2 mm3. In some embodiments, the tumor fragment is about 3 mm3. In some embodiments, the tumor fragment is about 4 mm3. In some embodiments, the tumor fragment is about 5 mm3. In some embodiments, the tumor fragment is about 6 mm3. In some ments, the tumor fragment is about 7 mm3. In some embodiments, the tumor fragment is about 8 mm3. In some embodiments, the tumor fragment is about 9 mm3. In some embodiments, the tumor fragment is about 10 mm3.

In some embodiments, the TILs are obtained from tumor digests. In some embodiments, tumor digests were generated by incubation in enzyme media, for example but not limited to RPMI 1640, 2 mM GlutaMAX, 10 mg/mL gentamicin, 3O U/mL DNase, and 1.0 mg/mL enase, followed by mechanical dissociation (GentleMACS, Miltenyi Biotec, Auburn, CA). After placing the tumor in enzyme media, the tumor can be mechanically iated for approximately 1 minute. The solution can then be incubated for 30 minutes at 37°C in 5% C02 and it then mechanically disrupted again for approximately 1 minute. After being incubated again for 30 s at 37°C in 5% C02, the tumor can be mechanically disrupted a third time for approximately 1 minute. In some embodiments, after the third mechanical tion if large pieces of tissue were present, 1 or 2 additional mechanical dissociations were applied to the , with or without 30 additional minutes of incubation at 37°C in 5% C02. In some embodiments, at the end of the final incubation if the cell suspension contained a large number of red blood cells or dead cells, a density gradient tion using Ficoll can be performed to remove these cells.

In some embodiments, the ted cell suspension prior to the first expansion step is called a “primary cell population” or a “freshly harvested” cell population.

In some embodiments, cells can be optionally frozen after sample harvest and stored frozen prior to entry into Step B, which is described in further detail below.

B. STEP B: First Expansion In some embodiments, a first expansion of TILs (also referred to as a first ion or first TIL expansion) may be performed using an initial bulk TIL expansion step (for example, Step B as indicated in Figure ll or a first expansion step, this can include an ion step referred to as preREP) as described below and herein, followed by a second expansion step (for example, Step D as indicated in Figure 11; which can include as an example what is referred to as a rapid expansion protocol (REP) step) as described below and herein, ed by optional cryopreservation (for example, after Step D as indicated in Figure 11), and followed by an additional second expansion (for example, a second Step D, as indicated in Figure 11, which can include what is sometimes referred to as a restimulation REP step) as described below and herein. The TILs obtained from this process may be ally characterized for phenotypic characteristics and lic parameters as described herein. In some embodiments, the TILs are frozen (116., cryopreserved) after the first expansion (for e, Step B as indicated in Figure 11) and stored until phenotyped for selection then thawed prior to proceeding to one or more second expansion steps (for example, one or more expansion according to Step D as indicated in Figure 11).

In some embodiments, where the cells are frozen after obtained from the tumor sample (such as, for e, during in Step A as indicated in Figure 11), the cells are thawed prior to the first ion (for example, Step B as indicated in Figure 11).

In embodiments where TIL cultures are initiated in 24-well , for example, using Costar 24-well cell culture cluster, flat bottom (Corning Incorporated, Corning, NY, each well can be seeded with lxlO6 tumor digest cells or one tumor fragment in 2 mL of complete medium (CM) with IL-2 (6000 IU/mL, Chiron Corp, Emeryville, CA). In some embodiments, the tumor fragment is between about 1mm3 and 10 mm3.

After preparation of the tumor fragments, the resulting cells (i.e., fragments) are ed in serum containing IL—2 under conditions that favor the growth of TILs over tumor and other cells. In some ments, the tumor digests are incubated in 2 mL wells in media comprising inactivated human AB serum (or, in some cases, as outlined herein, in the presence of aAPC cell population) with 6000 IU/mL of IL-2. This primary cell population is cultured for a period of days, generally from 10 to 14 days, resulting in a bulk TIL population, generally about 1 X 108 bulk TIL cells. In some embodiments, the growth media during the first expansion comprises IL-2 or a variant thereof. In some embodiments, the IL is recombinant human [L-2 (rh[L-2). In some ments the IL-2 stock solution has a specific activity of 20-30x106 IU/mg for a 1 mg vial. In some embodiments the IL-2 stock solution has a c activity of 20-x106 IU/mg for a 1 mg vial. In some embodiments the IL-2 stock solution has a specific activity of 25x106 IU/mg for a 1 mg vial. In some ments the IL-2 stock solution has a specific activity of 30x106 IU/mg for a 1 mg vial.

In some embodiments, the IL- 2 stock solution has a final concentration of 4-8x106 IU/mg of IL-2. In some embodiments, the IL- 2 stock solution has a final concentration of 5-7x106 IU/mg of IL-2. In some embodiments, the IL- 2 stock solution has a final concentration of 6x106 IU/mg of IL-2. In some ments, the IL-2 stock solution is prepare as described in Example 4. In some ments, first expansion culture media comprises about 10,000 IU/mL of IL-2, about 9,000 IU/mL of IL-2, about 8,000 IU/mL of IL—2, about 7,000 IU/mL of IL—2, about 6000 IU/mL of IL-2 or about 5,000 IU/mL of IL-2. In some embodiments, first ion culture media comprises about 9,000 IU/mL of IL-2, to about 5,000 IU/mL of IL- 2. In some embodiments, first expansion culture media comprises about 8,000 IU/mL of IL-2, to about 6,000 IU/mL of IL-2. In some embodiments, first expansion culture media comprises about 7,000 IU/mL of IL-2, to about 6,000 IU/mL of IL-2. In some embodiments, first expansion culture media comprises about 6,000 IU/mL of IL-2. In an embodiment, the cell culture medium further comprises IL-2. In some embodiments, the cell culture medium comprises about 3000 IU/mL of IL-2. In an embodiment, the cell e medium comprises about 1000 IU/mL, about 1500 IU/mL, about 2000 IU/mL, about 2500 IU/mL, about 3000 IU/mL, about 3500 IU/mL, about 4000 IU/mL, about 4500 IU/mL, about 5000 IU/mL, about 5500 IU/mL, about 6000 IU/mL, about 6500 IU/mL, about 7000 IU/mL, about 7500 IU/mL, or about 8000 IU/mL of IL—2. In an embodiment, the cell culture medium comprises between 1000 and 2000 IU/mL, between 2000 and 3000 IU/mL, between 3000 and 4000 IU/mL, n 4000 and 5000 IU/mL, between 5000 and 6000 IU/mL, between 6000 and 7000 IU/mL, between 7000 and 8000 IU/mL, or between 8000 IU/mL of IL-2.

] In some embodiments, the first expansion culture medium is referred to as “CM”, an abbreviation for e media. In some embodiments, it is referred to as CMl (culture medium 1). In some embodiments, CM consists ofRPMI 1640 with GlutaMAX, supplemented with 10% human AB serum, 25mM Hepes, and 10 mg/mL gentamicin. In embodiments where cultures are initiated in gas-permeable flasks with a 40 mL capacity and a 10cm2 gas-permeable silicon bottom (for example, G-Rex10, Wilson Wolf cturing, New on, MN) (Fig. 1), each flask was loaded with 10—40x 106 Viable tumor digest cells or 5—30 tumor fragments in 10—40mL of CM with IL-2. Both the G-RexlO and 24-well plates were incubated in a humidified incubator at 37°C in 5% C02 and 5 days after culture initiation, half the media was removed and replaced with fresh CM and IL-2 and after day 5, half the media was changed every 2—3 days. In some embodiments, the CM is the CM] described in the Examples, see, Example 5. In some embodiments, the first expansion occurs in an l cell culture medium or a first cell culture medium. In some embodiments, the initial cell culture medium or the first cell culture medium comprises 1L-2.

] In some embodiments, the first TIL expansion can proceed for 11 days, 12 days, 13 days, 14 days, 15 days, 16 days, 17 days, 18 days, 19 days, 20 days, or 21 days. In some embodiments, the first TIL expansion can proceed for 11 days to 21 days. In some embodiments, the first TIL expansion can proceed for 12 days to 21 days. In some embodiments, the first TIL expansion can proceed for 13 days to 21 days. In some embodiments, the first TIL expansion can proceed for 14 days to 21 days. In some embodiments, the first TIL expansion can proceed for 15 days to 21 days. In some embodiments, the first TIL expansion can proceed for 16 days to 21 days. In some embodiments, the first TIL expansion can d for 17 days to 21 days. In some embodiments, the first TIL ion can proceed for 18 days to 21 days. In some embodiments, the first TIL expansion can proceed for 19 days to 21 days. In some embodiments, the first TIL expansion can proceed for 20 days to 21 days. In some embodiments, the first TIL ion can proceed for 21 days.

C. STEP C: First ion to Second Expansion Transition In some embodiments, the TILs obtained from the first expansion (for example, from Step B as indicated in Figure 11) are stored until phenotyped for selection. In some embodiments, the TILs ed from the first expansion are cryopreserved after the first expansion and prior to the second expansion. In some ments, the TILs are cryopreserved as part of the first expansion to second expansion transition. For example, in some embodiments, the TILs are cryopreserved after Step B and before Step D as indicated in Figure 11. In some ments, the TILs are cryopreserved and thawed as part of the first expansion to second expansion transition. For example, in some embodiments, the TILs are cryopreserved after Step B then thawed prior to proceeding to Step D (as provided in Figure 11). In some embodiments, the transition from the first expansion to the second expansion occurs at about 22 days, 23, days, 24 days, 25 days, 26 days, 27 days, 28 days, 29 days, or 30 days from when ntation occurs. In some embodiments, the transition from the first expansion to the second expansion occurs at about 22 days to 30 days from when fragmentation occurs. In some embodiments, the transition from the first expansion to the second expansion occurs at about 24 days to 30 days from when fragmentation . In some embodiments, the transition from the first ion to the second expansion occurs at about 26 days to 30 days from when fragmentation occurs. In some embodiments, the transition from the first expansion to the second expansion occurs at about 28 days to 30 days from when fragmentation occurs. In some embodiments, the transition from the first expansion to the second expansion occurs at about 30 days from when fragmentation occurs.

D. STEP D: Second Expansion In some ments, the second expansion or second TIL expansion (which can include expansions sometimes referred to as REP) of TIL can be performed using any TIL flasks or containers known by those of skill in the art. In some embodiments, the second TIL expansion can proceed for 14 days, 15 days, 16 days, 17 days, 18 days, 19 days, 20 days, 21 days, or 22 days. In some embodiments, the second TIL ion can proceed for about 14 days to about 22 days. In some embodiments, the second TIL expansion can proceed for about 14 days to about 20 days. In some embodiments, the second TIL expansion can proceed for about 14 days to about 18 days. In some embodiments, the second TIL expansion can proceed for about 14 days to about 16 days. In some embodiments, the second TIL ion can proceed for about 14 days.

In some embodiments, the second expansion occurs in a supplemented cell culture medium. In some embodiments, the supplemented cell culture medium ses lL-2, OKT- 3, and antigen-presenting feeder cells. In some embodiments, the second cell culture medium comprises IL—2, OKT—3, and n—presenting cells (APCs, also referred to as antigen— presenting feeder cells).

In some embodiments, the second expansion (which can include expansions referred to as REP) of TILs can be performed using T-175 flasks and gas-permeable bags as previously described (Tran KQ, Zhou J, Durflinger KH, et al., 2008, other., 31 :742— 751, and Dudley ME, lich JR, Shelton TE, et al. 2003, JImmunother., 26:332—342) or gas-permeable G-Rex flasks. In some embodiments, the second expansion is performed using flasks. In some embodiments, the second expansion is med using gas-permeable G—Rex flasks. For TIL the second expansion in T-175 flasks, about 1 x 106 TIL are suspended in about 150 mL of media and this is added to each T-175 flask. The TIL are cultured with irradiated (50 Gy) allogeneic PBMC as “feeder” cells at a ratio of 1 to 100 and the cells were cultured in a 1 to 1 mixture of CM and AIM-V medium (50/50 medium), supplemented with 3000 IU/mL of IL-2 and 30 ng/mL of anti-CD3. The T-175 flasks are incubated at 37°C in 5% C02. In some embodiments, half the media is changed 5 days into the second expansion using 50/50 medium with 3000 IU/mL of IL-2. In some embodiments, on day 7, cells from 2 T-175 flasks are combined in a 3 L bag and 300 mL of AIM-V with 5% human AB serum and 3000 IU/mL of IL-2 is added to the 300 mL of TIL sion. The number of cells in each bag can be counted every day or two and fresh media can be added to keep the cell count between about 0.5 and about 2.0 x 106 cells/mL.

In some embodiments, the second expansion (which can include expansions referred to as REP) of TIL can be performed in 500 mL capacity gas permeable flasks with 100 cm2 gas-permeable silicon bottoms (G—Rex 100, commercially ble from Wilson Wolf Manufacturing Corporation, New Brighton, MN, USA) (Fig. 1), about 5 x 106 or 10 x 106 TIL are cultured with irradiated allogeneic PBMC at a ratio of 1 to 100 in 400 mL of 50/50 medium, supplemented with 3000 IU/mL of IL-2 and 30 ng/ mL of anti- CD3 (OKT3). The G—RexlOO flasks can be ted at 37°C in 5% C02. In some embodiments, 5 days into the second expansion, 250 mL of supernatant is removed and placed into centrifuge bottles and centrifuged at 1500 rpm (491 x g) for 10 minutes. The TIL pellets can then be resuspended with 150 mL of fresh medium with 5% human AB serum, 3000 IU per mL of IL-2 and added back to the original G—RexlOO flasks. In embodiments where TILs are expanded serially in G—RexlOO flasks, on day 7 the TIL in each G-RexlOO are suspended in the 300 mL of media present in each flask and the cell sion was d into three 100 mL aliquots that can be used to seed three G—RexlOO flasks. Then 150 mL of AIM—V with 5% human AB serum and 3000 IU per mL of IL-2 can be added to each flask. The OO flasks can be incubated at 37°C in 5% CO2 and after 4 days in to the second expansion, 150 mL of AIM-V with 3000 IU per mL of IL-2 can be added to each G—Rex100 flask. In some embodiments, the cells are harvested on day 14 of culture.

In some embodiments, the second expansion (which can include expansions referred to as REP) of TIL can be performed in a gas permeable container. For example, TILs can be rapidly expanded using non-specific T-cell receptor stimulation in the presence of interleukin-2 (IL-2) or interleukin-15 ). In an embodiment, expansion of the number of TILs uses about 1 x 109 to about 1 x 1011 antigen-presenting feeder cells. The non-specific T- cell receptor stimulus can include, for example, about 30 ng/ml of OKT3, a mouse monoclonal D3 antibody (commercially available from Ortho-McNeil, Raritan, NJ or yi h, Auburn, CA). TILs can be rapidly expanded fiirther stimulation of the TILs in vitro with one or more antigens, including antigenic portions thereof, such as epitope(s), of the cancer, which can be ally expressed from a vector, such as a human leukocyte antigen A2 (HLA-AZ) binding peptide, e.g., 0.3 uM MART-l :26-35 (27 L) or gpl 00:209— 217 (210M), optionally in the presence of a T-cell growth factor, such as 300 IU/mL IL-2 or IL-15. Other suitable antigens may e, e.g., NY-ESO-l, TRP-l, TRP-Z, tyrosinase cancer antigen, MAGE—A3, SSX—2, and VEGFRZ, or antigenic portions thereof. TIL may also be rapidly expanded by re-stimulation with the same antigen(s) of the cancer pulsed onto HLA-AZ-expressing antigen-presenting cells. Alternatively, the TILs can be further re- stimulated with, e.g., e, irradiated, autologous lymphocytes or with irradiated HLA— A2+ allogeneic lymphocytes and IL-2.

In some embodiments, the second expansion (which can e expansions referred to as REP) of TIL can be performed in 500 mL capacity gas permeable flasks with 100 cm rmeable silicon bottoms (G—Rex 100, commercially available from Wilson Wolf Manufacturing Corporation, New Brighton, MN, USA), 5 X 106 or 10 X 106 TIL may be cultured with aAPCs at a ratio of l to 100 in 400 mL of 50/50 , supplemented with % human AB serum, 3000 IU per mL of IL-2 and 30 ng per ml of anti-CD3 (OKT3). The G—Rex 100 flasks may be incubated at 37°C in 5% C02. On day 5, 250 mL of supernatant may be removed and placed into centrifuge bottles and centrifuged at 1500 rpm (491 X g) for minutes. The TIL pellets may be re-suspended with 150 mL of fresh medium with 5% human AB serum, 3000 IU per mL of IL-2, and added back to the original G—Rex 100 .

When TIL are expanded serially in G—Rex 100 flasks, on day 7 the TIL in each G—Rex 100 may be ded in the 300 mL of media present in each flask and the cell suspension may be divided into 3 100 mL aliquots that may be used to seed 3 G—Rex 100 flasks. Then 150 mL of AIM-V with 5% human AB serum and 3000 IU per mL of IL-2 may be added to each flask. The G—Rex 100 flasks may be incubated at 37° C in 5% C02 and after 4 days 150 mL of AIM-V with 3000 IU per mL of IL-2 may be added to each G—RexlOO flask. The cells may be ted on day 14 of culture.

In one embodiment, the second ion (including ions referred to as REP) is performed in flasks with the bulk TILs being mixed with a 100- or ZOO-fold excess of inactivated feeder cells, 30 mg/mL OKT3 anti-CD3 dy and 3000 IU/mL IL-2 in 150 ml media. Media replacement is done (generally 2/3 media replacement via respiration with fresh media) until the cells are transferred to an alternative growth chamber. Alternative growth chambers include GRex flasks and gas permeable containers as more fully discussed below.

In another embodiment, the second expansion (including expansions referred to as REP) is performed and further comprises a step wherein TILs are selected for superior tumor reactivity. Any selection method known in the art may be used. For example, the methods bed in US. Patent Application Publication No. 2016/0010058 Al, the sures of which are incorporated herein by reference, may be used for ion of TILs for superior tumor reactivity.

Optionally, a cell viability assay can be performed after the second expansion (including expansions referred to as the REP expansion), using rd assays known in the art. For example, a trypan blue ion assay can be done on a sample of the bulk TILs, which selectively labels dead cells and allows a ity assessment. In some embodiments, TIL samples can be counted and viability determined using a Cellometer K2 automated cell counter (Nexcelom Bioscience, Lawrence, MA). In some embodiments, viability is determined according to the Cellometer K2 Image Cytometer Automatic Cell Counter protocol described, for example, in Example 2.

In some embodiments, cells are grown for 7 days, 8 days, 9 days, 10 days, or 11 days of the total second ion time before being split into more than one container or flask.

In some embodiments, the second expansion culture medium (e. g., sometimes referred to as CM2 or the second cell culture medium), comprises IL-2, OKT-3, as well as the antigen—presenting feeder cells (APCs), as discussed in more detail below.

In some embodiments, the antigen-presenting feeder cells are PBMCS. In some embodiments, the antigen-presenting feeder cells are artificial n-presenting feeder cells.

In an embodiment, the ratio of TILs to antigen-presenting feeder cells in the second expansion is about 1 to 25, about 1 to 50, about 1 to 100, about 1 to 125, about 1 to 150, about 1 to 175, about 1 to 200, about 1 to 225, about 1 to 250, about 1 to 275, about 1 to 300, about 1 to 325, about 1 to 350, about 1 to 375, about 1 to 400, or about 1 to 500. In an embodiment, the ratio of TILs to antigen-presenting feeder cells in the second expansion is between 1 to 50 and l to 300. In an embodiment, the ratio of TILs to antigen-presenting feeder cells in the second ion is between 1 to 100 and l to 200.

] In an embodiment, the TIL expansion procedures described herein e an excess of feeder cells during the second expansion (including for example, expansions referred to as REP TIL expansions). In many embodiments, the feeder cells are peripheral blood mononuclear cells (PBMCs) obtained from standard whole blood units from healthy blood donors. The PBMCs are obtained using standard methods such as Ficoll-Paque nt separation. In an embodiment, artificial antigen-presenting (aAPC) cells are used in place of PBMCS.

In general, the allogenic PBMCs are inactivated, either via irradiation or heat treatment, and used in the REP procedures.

In some embodiments, the growth media during the first expansion comprises lL-2 or a variant thereof. In some embodiments, the IL is recombinant human IL-2 (rhIL-2). In some embodiments the IL-2 stock solution has a specific activity of 20-30x106 IU/mg for a 1 mg vial. In some embodiments the IL-2 stock on has a specific ty of 20-xlO6 IU/mg for a 1 mg vial. In some ments the IL-2 stock solution has a specific activity of 25x106 IU/mg for a 1 mg vial. In some embodiments the IL-2 stock solution has a specific activity of 30x106 IU/mg for a 1 mg vial. In some embodiments, the IL- 2 stock solution has a final concentration of 4-8x106 IU/mg of IL-2. In some embodiments, the IL- 2 stock solution has a final concentration of 5-7x106 IU/mg of IL-2. In some ments, the IL- 2 stock solution has a final concentration of 6x106 IU/mg of [L-2. In some embodiments, the IL-2 stock solution is prepare as described in Example 4. In some ments, first expansion culture media comprises about 10,000 IU/mL of IL-2, about 9,000 IU/mL of IL-2, about 8,000 IU/mL of IL-2, about 7,000 IU/mL of IL-2, about 6000 IU/mL of IL-2 or about 5,000 IU/mL of IL-2. In some embodiments, first expansion culture media comprises about 9,000 IU/mL of IL-2, to about 5,000 IU/mL of IL-2. In some embodiments, first ion culture media comprises about 8,000 IU/mL of IL-2, to about 6,000 IU/mL of IL-2. In some embodiments, first expansion culture media comprises about 7,000 IU/mL of IL-2, to about 6,000 IU/mL of IL-2. In some embodiments, first expansion culture media ses about 6,000 IU/mL of IL-2. In an embodiment, the cell culture medium r comprises IL-2. In some embodiments, the cell e medium comprises about 3000 IU/mL of IL-2. In an ment, the cell e medium comprises about 1000 IU/mL, about 1500 IU/mL, about 2000 IU/mL, about 2500 IU/mL, about 3000 IU/mL, about 3500 IU/mL, about 4000 IU/mL, about 4500 IU/mL, about 5000 IU/mL, about 5500 IU/mL, about 6000 IU/mL, about 6500 IU/mL, about 7000 IU/mL, about 7500 IU/mL, or about 8000 IU/mL of IL-2. In an embodiment, the cell culture medium comprises between 1000 and 2000 IU/mL, between 2000 and 3000 IU/mL, between 3000 and 4000 IU/mL, between 4000 and 5000 IU/mL, between 5000 and 6000 IU/mL, between 6000 and 7000 IU/mL, between 7000 and 8000 IU/mL, or between 8000 IU/mL of IL-2.

In some embodiments, the second expansion cell culture media also includes an anti-CD3 antibody. In some ment, the cell culture medium comprises OKT3 antibody.

In some embodiments, the cell culture medium comprises about 30 ng/mL of OKT3 antibody. In an embodiment, the cell culture medium comprises about 0.1 ng/mL, about 0.5 ng/mL, about 1 ng/mL, about 2.5 ng/mL, about 5 ng/mL, about 7.5 ng/mL, about 10 ng/mL, about 15 ng/mL, about 20 ng/mL, about 25 ng/mL, about 30 ng/mL, about 35 ng/mL, about 40 ng/mL, about 50 ng/mL, about 60 ng/mL, about 70 ng/mL, about 80 ng/mL, about 90 ng/mL, about 100 ng/mL, about 200 ng/mL, about 500 ng/mL, and about 1 ug/mL of OKT3 antibody. In an embodiment, the cell culture medium comprises between 0.1 ng/mL and 1 ng/mL, between 1 ng/mL and 5 ng/mL, between 5 ng/mL and 10 ng/mL, between 10 ng/mL and 20 ng/mL, n 20 ng/mL and 30 ng/mL, n 30 ng/mL and 40 ng/mL, between 40 ng/mL and 50 ng/mL, and between 50 ng/mL and 100 ng/mL of OKT3 antibody.

In some embodiments, an anti-CD3 dy in combination with IL—2 induces T cell activation and cell division in the TIL population. This effect can be seen with full length antibodies as well as Fab and F(ab’)2 fragments, with the former being generally preferred; see, e.g., Tsoukas et 61]., J. Immunol. 1985, 135, 1719, hereby incorporated by reference in its entirety. As will be iated by those in the art, there are a number of suitable anti-human CD3 antibodies that find use in the invention, including anti-human CD3 polyclonal and monoclonal antibodies from various mammals, including, but not limited to, murine, human, primate, rat, and canine antibodies. In particular embodiments, the OKT3 anti-CD3 antibody is used (commercially available from Ortho-McNeil, Raritan, NJ or Miltenyi Biotech, Auburn, CA).

In some embodiment, the cells in the second expansion are grown in a culture media with high doses of a ne, in particular lL-Z, as is known in the art.

Alternatively, using ations of nes for the second expansion of TILS is additionally possible, with combinations of two or more of IL—2, TL-lS and 11—21 as is lly outlined in International Publication No. WC 2015/ l 893 56 and ational Publication No. entirety. Thus, possible combinations e IL—2 and IL—15, IL—2 and IL—21, IL—15 and IL- 21 and IL-2, IL-lS and IL-21, with the latter finding particular use in many embodiments.

The use of combinations of cytokines specifically favors the generation of lymphocytes, and in particular T—cells as described n.

E. Optional Repeats of Step D: Second Expansion In some embodiments, the second expansion is performed one or more times, 1.6., the second expansion is repeated. For example, in some embodiments the Step D second expansion as indicated in Figure 11 is repeated one or more times. In some embodiments, the second expansion is referred to as an additional second expansion. In some embodiments where the second expansion is performed more than once (i.e., where the second expansion is repeated), this can include procedures referred to as a TIL Rapid Expansion Protocol. In some embodiments, the TIL cell population is expanded in number after harvest and first expansion. This s is generally referred to in the art as a rapid expansion s (REP) and the repeated second expansion can include expansion referred to as reREP. This overall protocol can be lly accomplished using e media comprising a number of components, including feeder cells, a cytokine source, and an anti-CD3 antibody, in a gas- permeable container. In some embodiments, one or more subsequent second expansion(s) are performed as described above. In some embodiments, one or more subsequent second expansions are performed as provided in under Step D in Figure 11 and prior to Step E as provide in Figure 11. In some embodiments, one, two, three, four or more second expansions are performed as described above. In some ments, one, two, three, four or more second expansions are performed as provided in Step D of Figure ll before Step E of Figure 11. In some embodiments, two second expansions are performed as described above. In some embodiments, two second expansions are performed as provided in Step D of Figure 11 before Step E of Figure 11. In some embodiments, three second expansions are med as described above. In some embodiments, three second expansions are performed as provided in Step D of Figure 11 before Step E of Figure 11. In some embodiments, four second expansions are performed as described above. In some embodiments, four second expansions are med as provided in Step D of Figure 11 before Step E of Figure 11.

In some embodiments, the repeat of the second expansion of the TILS (such as for example in Step D of Figure 11) can be referred to as a restimulation of TILs. In some embodiments, the present invention includes a restimulation step, i.e., a repeat of the second ion (for example, a repeat of the second expansion from Step D of Figure 11). In some embodiments, the repeated second expansion (which can e an expansion referred to as a restimulation step (“reRE ”)) is performed on cells that have been cryopreserved. In some embodiments, the TILS are cryopreserved after Step D. In some embodiments, after an l second expansion in Step D,, the cells may be cultured in regular media, e.g. a “resting” media, and then one or more second expansions steps are performed. In some embodiments, the resting media comprises IL—2. In some embodiments, the g media does not comprise IL-2. In some embodiments, the resting media is a standard cell culture media known in the art. In some embodiments, the resting media is AHVI—V, DMEM, DMEM/F 12, MEM, RPMI, OptilVIEM, IlVEDM, or any other standard media that is known in art, including commercially available media. In some embodiments, the resting media is AIM-V.

In general, as discussed herein, the TILs are initially prepared by obtaining a primary population of TILs from a tumor ed from a patient as discussed herein (the ry cell population” or “first cell population”). This is followed with an initial bulk expansion utilizing a culturing of the cells with IL-2, forming a second population of cells (sometimes referred to herein as the “bulk TIL population” or “second population”). In some embodiments, this is also referred to as the initial or first ion.

The bulk TIL population (for example, the population obtained from for example Step A in Figure 11) is then subjected to a REP step, sometimes referred to as a first expansion (for e, the first expansion as described in Step B of Figure 11) in a cell e media comprising IL-2, OKT-3, and n presenting feeder cells (APCs), wherein the APCs generally comprise peripheral blood mononuclear cells (PBMCs, or, alternatively as discussed herein, using n presenting cells), wherein the rapid expansion (for example, the second expansion as e in Step D of Figure 11) is performed for at least 14 days. As discussed herein, the media may also contain combinations of IL-2, IL-15 and/or IL- 23 rather than IL-2 alone. In some embodiments, this post second expansion (for example, post Step D of Figure ll) ed TIL population is at least 50 —fold or lOO-fold greater in number than the second population of TILs (for example, the tion of TILs obtained from Step B of Figure 11). In some ments, the population of TILs obtained after the second expansion in Step D of Figure ll are 50-fold or lOO-fold greater in number than the TILs obtained from the first expansion in Step B of Figure 11. TILs are measured by cell counting methods known in the art, including those methods described in the Examples provided herewith, including Examples 1, 2, and 3. In some embodiments, a K2 cell counter is employed to count the TILs. In some embodiments, a Cellometer 1C2 Image ter is employed to count the TILs.

In some embodiments, as discussed herein, the TIL population obtained after the second expansion (sometimes referred to as a third TIL population or a REP cell population) is removed from the supplemented cell e media (for e, the culture media used in Step D of Figure 11 or the media ed to as CM2 in the Examples) and optionally cryopreserved in a storage media (for example, media containing 5% DMSO) prior to performing and additional second expansion step.

Optionally, the TILs can be cryopreserved after a second expansion and before an additional second expansion. In some embodiments, the TILs are cryopreserved after ming Step D of Figure 11 and before performing an additional Step D of Figure 11. In some embodiments, the cryopreserved TILs are thawed prior to performing the additional second expansion. In some embodiments, the cryopreserved TILs are thawed prior to performing the additional Step D as provided in Figure 11. In some embodiments, the TILs are eserved in 5% DMSO. In some embodiments, the TILs are cryopreserved in cell culture media plus 5% DMSO. Alternatively, the cells are removed from the supplemented cell culture media (for example, the culture media used in Step D of Figure 11) and cultured in a resting media. Such media include those that are described in Examples 1 and 5, as well as the other Examples provided herewith. In some embodiments, resting media can include media with IL—2. In some embodiments, the resting media can be the media referred to as CMl in the examples.

] The additional second expansion (including expansions referred to as reREP) is done on either the thawed cells or resting cells, using a mented cell culture medium (for example, a medium as provide in Step D of Figure 11) comprising IL-2, OKT-3, and WO 81473 feeder cells (for example, antigen presenting , generally comprising eral blood mononuclear cells (PBMCs; or, alternatively as discussed herein, using antigen presenting cells), wherein the additional second expansion is med for at least 14 days. As sed herein, the media may also contain combinations of IL-2, IL-15 and/or IL-23 rather than IL-2 alone.

This results in an expanded tion of TILs that are characterized in that these expanded TILs ts an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs (e.g., the bulk starting TILS). In some embodiments, these expanded TILs are the TILs obtained from Step D of Figure 11.

In some embodiments the memory T cells are those cells that constitutively CCR7 and CD62L. See, Sallusto, el 51]., Annu. Rev. Immunol, 2004, 22:745-763, incorporated by reference herein in its entirety.

Thus, the present invention provides methods for the restimulation of cryopreserved TILs upon thawing, based on post-thaw methods that result in increases of lic health such as glycolysis and respiration. In some embodiments, method comprises providing a population of thawed cryopreserved TILs that are then treated to increase their metabolic health to allow for optimal treatment upon infusion into patients.

F. STEP E: Harvest TILS from Step D After the second expansion step, cells can be harvested. In some embodiments the TILs are harvested after one, two, three, four or more second expansion steps. In some embodiments, the TILs are harvested after one, two, three, four or more second expansion steps according to Step D as provided in Figure ll.

TILs can be harvested in any appropriate and sterile manner, including for example by centrifugation. Methods for TIL harvesting are well known in the art and any such know s can be employed with the present process.

G. STEP F: Final Formulation and/or Transfer to on Bag After Steps A h E as provided in an exemplary order in Figure 11 and as outlined in detailed above and herein are complete, cells are transferred to a container for use in administration to a patient. In some embodiments, once a therapeutically sufficient number of TILs are obtained using the expansion methods described above, they are transferred to a container for use in administration to a patient.

In an embodiment, TILs expanded using APCs of the present sure are administered to a t as a pharmaceutical composition. In an embodiment, the pharmaceutical composition is a suspension of TILs in a e buffer. TILs expanded using PBMCs of the present disclosure may be administered by any suitable route as known in the art. In some embodiments, the T-cells are administered as a single intra-arterial or intravenous infusion, which preferably lasts approximately 30 to 60 minutes. Other suitable routes of administration include intraperitoneal, intrathecal, and intralymphatic. 1. Pharmaceutical Compositions, Dosages, and Dosing Regimens ] In an embodiment, TlLs expanded using APCs of the present disclosure are administered to a patient as a pharmaceutical ition. In an embodiment, the pharmaceutical composition is a suspension of TILs in a sterile buffer. TILs expanded using PBMCs of the present disclosure may be administered by any suitable route as known in the art. In some embodiments, the T-cells are administered as a single intra-arterial or intravenous infusion, which preferably lasts approximately 30 to 60 minutes. Other suitable routes of stration include intrapelitoneal, intrathecal, and intralymphatic administration.

Any suitable dose of TILs can be administered. In some embodiments, a therapeutically sufficient number of TILs are needed for a suitable dosage. In some embodiments, from about 2.3 X 1010 to about 13.7X1010 TILs are administered, with an e of around 7.8X1010 TILs, particularly if the cancer is melanoma. In an embodiment, about 1.2X 1010 to about 4.3X 1010 of TILs are administered. In some embodiments, about 3X 1010 to about 12X1010 TILs are administered. In some embodiments, about 4X 1010 to about 10X 1010 TILs are administered. In some embodiments, about 5X 1010 to about 8X 1010 TILs are administered. In some embodiments, about 6X 1010 to about 8X1010 TILs are administered. In some embodiments, about 7X 1010 to about 8X1010 TILs are stered. In some embodiments, the therapeutically effective dosage is about 2.3 X 1010 to about l3.7X1010. In some embodiments, the therapeutically effective dosage is about 7 .8X 1010 TILs, particularly of the cancer is melanoma. In some embodiments, the eutically effective dosage is about 1.2X 1010 to about 4.3X1010 of TILs. In some ments, the therapeutically ive dosage is about 3 X 1010 to about 12X 1010 TILs. In some embodiments, the therapeutically effective dosage is about 4X 1010 to about 10X 1010 TILs. In some embodiments, the therapeutically effective dosage is about 5X 1010 to about 8X1010 TILs. In some embodiments, the therapeutically effective dosage is about 6>< 1010 to about 8X1010 TILs. In some embodiments, the therapeutically effective dosage is about 7X 1010 to about 8X1010 TILs.

In some embodiments, the number of the TILs provided in the pharmaceutical compositions ofthe ion is about 1X106, 2X106, 38106, 4><106, 5X106, 6X106, 7><106, 8><106,9X106,1><107,2X107,3X107,4X107,5><107,6X107,7X107,8X107,9><107,1X108,2X108, 3x108,4x108,5x108,6x108,7x108,8x103,9x108,1x109,2x109,3x109,4x109,5x109,6x109, 7X109,8X109,9X109,1><101°,2><1010,3X1010,4X1010,5X1010,6X1010,7X1010,8X1010,9X1010, 1x1011,2x1011,3x1011,4x1011,5x1011,6x1011,7x1011,8x1011,9x1011,1x1012,2x1012, 3x1012,4x1012,5x1012,6x1012,7x1012,8x1012,9x1012,1x1013,2x1013,3x1013,4x1013, ,6X1013, 7X 10”, 8X10”, and 9X10”. In an embodiment, the number ofthe TILs provided in the pharmaceutical compositions of the invention is in the range of 1><106 to 5x106, 5x106 to 1x107, 1x107 to 5x107, 5x107 to 1x108, 1x108 to 5x108, 5x108 to 1x109, 1x109 to 5x109, 5x109 to 1x10“), 1x1010 to 5X10“),5><1010to1X1011,5X1011t01X1012, 1X1012 to 5X10”, and 5X1012 to 1X10”. In some embodiments, the therapeutically ive dosage is about 1x106, 2x106, 3x106, 4x106, 5x106, 6X106, 7x106, 8x106, 9x106, 1x107, 2X107,3><107,4><107,5X107,6X107,7><107,8><107,9X107,1X108,2><108,3><103,4X108,5X108, 6X108,7X108,8X108,9X108,1X109,2X109,3X109,4X109,5X109,6X109,7X109,8X109,9X109, 1X1010,2X1010,3X1010,4X1010,5X1010,6X1010,7X1010,8X1010,9><1010,1X10“,2X10“, ,4x1011,5x1011,6x1011,7x1011,8x1011,9x1011, 1x1012,2x1012,3x1012,4x1012, 5X1012,6><1012,7><1012,8X1012,9X1012,1X1013,2X1013,3X1013,4X1013,5X1013,6X1013, 7><1013,8X1013,and 9x10”.

In some embodiments, the concentration of the TILs provided in the pharmaceutical compositions of the invention is less than, for example, 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 19%, 18%, 17%, 16%, 15%, 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, %, 4%, 3%, 2%, 1%, 0.5%, 0.4%, 0.3%, 0.2%, 0.1%, 0.09%, 0.08%, 0.07%, 0.06%, 0.05%, 0.04%, 0.03%, 0.02%, 0.01%, 0.009%, 0.008%, 0.007%, 0.006%, 0.005%, 0.004%, 0.003%, 0.002%, 0.001%, 0.0009%, 0.0008%, 0.0007%, 0.0006%, 0.0005%, 0.0004%, 0.0003%, 0,0002% or 0,0001% w/W, W/v or v/v of the pharmaceutical composition.

In some embodiments, the concentration of the TILs ed in the pharmaceutical compositions of the invention is greater than 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, , 19.50%, 19.25% 19%, 18.75%, 18.50%, 18.25% 18%, 17.75%, 17.50%, 17.25% 17%, 16.75%, 16.50%, 16.25% 16%, 15.75%, 15.50%, 15.25% 15%, 14.75%, 14.50%, 14.25% 14%, 13.75%, 13.50%, 13.25% 13%, 12.75%, 12.50%, 12.25% 12%, 11.75%, 11.50%, 11.25% 11%, 10.75%, 10.50%, 10.25% 10%, 9.75%, 9.50%, 9.25% 9%, 8.75%, 8.50%, 8.25% 8%, 7.75%, 7.50%, 7.25% 7%, 6.75%, 6.50%, 6.25% 6%, 5,75%, 5.50%, .25% 5%, 4.75%, 4.50%, 4.25%, 4%, 3.75%, 3.50%, 3.25%, 3%, 2.75%, 2.50%, 2.25%, 2%, 1.75%, 1.50%, 125%, 1%, 0.5%, 0.4%, 0.3%, 0.2%, 0.1%, 0.09%, 0.08%, 0.07%, 0.06%, 0.05%, 0.04%, 0.03%, 0.02%, 0.01%, 0.009%, 0.008%, 0.007%, 0.006%, , 0.004%, 0.003%, 0.002%, , 0.0009%, 0.0008%, 0.0007%, 0.0006%, 0.0005%, 0.0004%, 0.0003%, 0.0002% or 0.0001% w/w, w/v, or v/v of the pharmaceutical ition.

In some embodiments, the concentration of the TILs provided in the pharmaceutical compositions of the invention is in the range from about 0.0001% to about 50%, about 0.001% to about 40%, about 0.01% to about 30%, about 0.02% to about 29%, about 0.03% to about 28%, about 0.04% to about 27%, about 0.05% to about 26%, about 0.06% to about %, about 0.07% to about 24%, about 0.08% to about 23%, about 0.09% to about 22%, about 0.1% to about 21%, about 0.2% to about 20%, about 0.3% to about 19%, about 0.4% to about 18%, about 0.5% to about 17%, about 0.6% to about 16%, about 0.7% to about 15%, about 0.8% to about 14%, about 0.9% to about 12% or about 1% to about 10% W/w, w/v or v/v of the pharmaceutical composition.

In some ments, the tration of the TILs provided in the pharmaceutical compositions of the invention is in the range from about 0.001% to about 10%, about 0.01% to about 5%, about 0.02% to about 4.5%, about 0.03% to about 4%, about 0.04% to about 3.5%, about 0.05% to about 3%, about 0.06% to about 2.5%, about 0.07% to about 2%, about 0.08% to about 1.5%, about 0.09% to about 1%, about 0.1% to about 0.9% W/W, W/v or v/v of the pharmaceutical composition.

In some embodiments, the amount of the TILs provided in the pharmaceutical compositions ofthe invention is equal to or less than 10 g, 9.5 g, 9.0 g, 8.5 g, 8.0 g, 7.5 g, 7.0 g, 6.5 g, 6.0 g, 5.5 g, 5.0 g, 4.5 g, 4.0 g, 3.5 g, 3.0 g, 2.5 g, 2.0 g, 1.5 g, 1.0 g, 0.95 g, 0.9 g, 0.85 g, 08 g, 0.75 g, 0.7 g, 0.65 g, 0.6 g, 0.55 g, 0.5 g, 0.45 g, 04 g, 0.35 g, 0.3 g, 0.25 g, 0.2 g, 0.15 g, 0.1 g, 0.09 g, 0.08 g, 0.07 g, 0.06 g, 0.05 g, 0.04 g, 0.03 g, 0.02 g, 0.01 g, 0.009 g, 0.008 g, 0.007 g, 0.006 g, 0.005 g, 0.004 g, 0.003 g, 0.002 g, 0.001 g, 0.0009 g, 0.0008 g, 0.0007 g, 0.0006 g, 0.0005 g, 0.0004 g, 0.0003 g, 0.0002 g, or 0.0001 g.

] In some embodiments, the amount of the TILs provided in the pharmaceutical compositions of the invention is more than 0.0001 g, 0.0002 g, 0.0003 g, 0.0004 g, 0.0005 g, 0.0006 g, 0.0007 g, 0.0008 g, 0.0009 g, 0.001 g, 0.0015 g, 0.002 g, 0.0025 g, 0,003 g, 0.0035 g, 0.004 g, 0.0045 g, 0.005 g, 0.0055 g, 0.006 g, 0.0065 g, 0.007 g, 0.0075 g, 0.008 g, 0.0085 g, 0.009 g, 0.0095 g, 0.01 g, 0.015 g, 0.02 g, 0.025 g, 0.03 g, 0.035 g, 0.04 g, 0.045 g, 0.05 g, 0.055 g, 0.06 g, 0.065 g, 0.07 g, 0,075 g, 0.08 g, 0.085 g, 0.09 g, 0.095 g, 0.1 g, 0.15 g, 02 g, 0.25 g, 0.3 g, 0.35 g, 0.4 g, 0.45 g, 0.5 g, 0.55 g, 0.6 g, 0.65 g, 0.7 g, 0.75 g, 0.8 g, 0.85 g, 0.9 g, 0.95 g, lg, 1.5 g, 2 g, 2.5, 3 g, 3.5, 4 g, 4.5 g, 5 g, 5.5 g, 6 g, 6.5 g, 7 g, 7.5 g, 8 g, 8.5 g, 9 g, 9.5 g, or 10 g.

The TILs provided in the pharmaceutical compositions of the invention are effective over a wide dosage range. The exact dosage will depend upon the route of administration, the form in which the compound is stered, the gender and age of the subject to be treated, the body weight of the subject to be d, and the preference and experience of the attending physician. The clinically-established dosages of the TILs may also be used if appropriate. The amounts of the pharmaceutical compositions administered using the methods herein, such as the dosages of TILs, will be dependent on the human or mammal being treated, the severity of the disorder or condition, the rate of administration, the disposition of the active pharmaceutical ingredients and the discretion of the prescribing physician.

In some embodiments, TILs may be administered in a single dose. Such administration may be by injection, e.g, intravenous injection. In some embodiments, TILs may be administered in multiple doses. Dosing may be once, twice, three times, four times, five times, six times, or more than six times per year. Dosing may be once a month, once every two weeks, once a week, or once every other day. Administration of TILs may continue as long as necessary.

In some embodiments, an effective dosage of TILs is about 1X106, 2><106, 3X106, 4X106,5X106,6X106,7><106,8X106,9X106,1X107,2><107,3X107,4X107,5X107,6><107,7X107, 8x107,9x107,1x108,2x108,3x108,4x108,5x108,6><108,7x108,8x108,9x108,1x109,2x109, 4x109,5x109,6x109,7x109,8x109,9x109,1x101°,2x1010,3x1010,4x1010,5x1010, 6X1010,7X1010, 8X1010,9X1010, 1x1011,2x1011,3x1011,4x1011, 5x1011,6x1011,7x1011, 8x1011,9x1011, 1x1012,2x1012,3x1012,4x1012,5x1012,6x1012,7x1011,8x1012,9x1012, ,2x1013,3x1013,4x1013, 5x1013,6x1013,7x1013, 3,and 9x1013.1n some embodiments, an effective dosage of TILs is in the range of 1X106 to 5X106, 5>< 106 to 1X107, 1x107 to 5x107, 5x107 to 1x108, 1x108 to 5x108, 5x108 to 1x109, 1x109 to 5x109, 5x109 to 1x1010,1x1010to 5x10“), 5x1010 to 1x10“, 5x1011 to 1x10”, 1x1012 to 5x10”, and 5x1012 to 1x10”.

In some embodiments, an effective dosage of TILs is in the range of about 0.01 mg/kg to about 4.3 mg/kg, about 0.15 mg/kg to about 3.6 mg/kg, about 0.3 mg/kg to about 3.2 mg/kg, about 0.35 mg/kg to about 2.85 mg/kg, about 0.15 mg/kg to about 2.85 mg/kg, about 0.3 mg to about 2.15 mg/kg, about 0.45 mg/kg to about 1.7 mg/kg, about 0.15 mg/kg to about 1.3 mg/kg, about 0.3 mg/kg to about 1.15 mg/kg, about 0.45 mg/kg to about 1 mg/kg, about 0.55 mg/kg to about 0.85 mg/kg, about 0.65 mg/kg to about 0.8 mg/kg, about 0.7 mg/kg to about 0.75 mg/kg, about 0.7 mg/kg to about 2.15 mg/kg, about 0.85 mg/kg to about 2 mg/kg, about 1 mg/kg to about 1.85 mg/kg, about 1.15 mg/kg to about 1.7 mg/kg, about 1.3 mg/kg mg to about 1.6 mg/kg, about 1.35 mg/kg to about 1.5 mg/kg, about 2.15 mg/kg to about 3.6 mg/kg, about 2.3 mg/kg to about 3.4 mg/kg, about 2.4 mg/kg to about 3.3 mg/kg, about 2.6 mg/kg to about 3.15 mg/kg, about 2.7 mg/kg to about 3 mg/kg, about 2.8 mg/kg to about 3 mg/kg, or about 2.85 mg/kg to about 2.95 mg/kg.

] In some embodiments, an effective dosage of TILs is in the range of about 1 mg to about 500 mg, about 10 mg to about 300 mg, about 20 mg to about 250 mg, about 25 mg to about 200 mg, about 1 mg to about 50 mg, about 5 mg to about 45 mg, about 10 mg to about 40 mg, about 15 mg to about 35 mg, about 20 mg to about 30 mg, about 23 mg to about 28 mg, about 50 mg to about 150 mg, about 60 mg to about 140 mg, about 70 mg to about 130 mg, about 80 mg to about 120 mg, about 90 mg to about 110 mg, or about 95 mg to about 105 mg, about 98 mg to about 102 mg, about 150 mg to about 250 mg, about 160 mg to about 240 mg, about 170 mg to about 230 mg, about 180 mg to about 220 mg, about 190 mg to about 210 mg, about 195 mg to about 205 mg, or about 198 to about 207 mg.

An effective amount of the TILs may be administered in either single or multiple doses by any of the accepted modes of administration of agents having similar utilities, including intranasal and transdermal routes, by intra-arterial injection, intravenously, intraperitoneally, parenterally, uscularly, subcutaneously, topically, by transplantation, or by inhalation.

H. Optional Cell Viability Analyses ] ally, a cell viability assay can be performed after the Step B first expansion, using standard assays known in the art. For example, a trypan blue exclusion assay can be done on a sample of the bulk TILs, which selectively labels dead cells and allows a viability assessment. Other assays for use in testing viability can include but are not limited to the Alamar blue assay, and the MTT assay. 1. Cell Counts, ity, Flow Cytometry ] In some embodiments, cell counts and/or viability are measured. The expression of markers such as but not limited CD3, CD4, CD8, and CD56, as well as any other disclosed or described herein, can be measured by flow cytometry with antibodies, for example but not limited to those commercially available from BD Bio-sciences (BD Biosciences, San Jose, CA) using a FACSCantoTM flow cytometer (BD Biosciences). The cells can be counted manually using a disposable c-chip hemocytometer (VWR, Batavia, IL) and ity can be assessed using any method known in the art, ing but not limited to trypan blue staining.

] In some cases, the bulk TIL population can be cryopreserved immediately, using the protocols discussed below. Alternatively, the bulk TIL population can be subjected to REP and then cryopreserved as discussed below. Similarly, in the case where cally modified TILs will be used in therapy, the bulk or REP TIL populations can be subjected to genetic modifications for suitable treatments. 2, Cell Cultures In an embodiment, a method for expanding TILs may include using about 5,000 mL to about 25,000 mL of cell medium, about 5,000 mL to about 10,000 mL of cell medium, or about 5,800 mL to about 8,700 mL of cell medium, In an embodiment, expanding the number of TILs uses no more than one type of cell culture medium. Any suitable cell culture medium may be used, e. g., AIM-V cell medium tamine, 50 uM streptomycin sulfate, and 10 [1M gentamicin sulfate) cell culture medium (Invitrogen, Carlsbad CA), In this regard, the inventive methods advantageously reduce the amount of medium and the number of types of medium required to expand the number of TIL. In an embodiment, ing the number of TIL may comprise adding fresh cell culture media to the cells (also referred to as feeding the cells) no more frequently than every third or fourth day. Expanding the number of cells in a gas permeable container fies the procedures necessary to expand the number of cells by reducing the feeding frequency ary to expand the cells.

In an embodiment, the cell medium in the first and/or second gas permeable container is unfiltered. The use of unfiltered cell medium may simplify the procedures necessary to expand the number of cells. In an embodiment, the cell medium in the first and/or second gas permeable container lacks beta-mercaptoethanol (BME).

In an embodiment, the on of the method comprising obtaining a tumor tissue sample from the ; culturing the tumor tissue sample in a first gas permeable container ning cell medium therein; obtaining TILs from the tumor tissue sample; expanding the number of TILs in a second gas permeable container containing cell medium therein using aAPCs for a duration of about 14 to about 42 days, e.g, about 28 days.

In an embodiment, TILs are expanded in gas-permeable containers. Gas-permeable containers have been used to expand TILs using PBMCs using methods, compositions, and devices known in the art, including those described in US. Patent ation Publication No. 2005/0106717 Al, the disclosures of which are incorporated herein by nce. In an embodiment, TILs are expanded in gas—permeable bags. In an embodiment, TILs are expanded using a cell expansion system that expands TILs in gas permeable bags, such as the Xuri Cell Expansion System W25 (GE Healthcare). In an embodiment, TILs are expanded using a cell expansion system that expands TILs in gas permeable bags, such as the WAVE Bioreactor System, also known as the Xuri Cell Expansion System W5 (GE Healthcare). In an embodiment, the cell expansion system es a gas permeable cell bag with a volume ed from the group consisting of about 100 mL, about 200 mL, about 300 mL, about 400 mL, about 500 mL, about 600 mL, about 700 mL, about 800 mL, about 900 mL, about 1 L, about 2 L, about 3 L, about 4 L, about 5 L, about 6 L, about 7 L, about 8 L, about 9 L, and about 10 L. In an embodiment, TILs can be expanded in G—Rex flasks (commercially available from Wilson Wolf Manufacturing). Such embodiments allow for cell populations to expand from about 5x105 cells/cm2 to between 10x106 and 30x106 cells/cmz. In an embodiment this ion is conducted without adding fresh cell culture media to the cells (also referred to as feeding the cells). In an embodiment, this is without feeding so long as medium resides at a height of about 10 cm in the GRex flask. In an embodiment this is without feeding but with the addition of one or more cytokines. In an ment, the cytokine can be added as a bolus without any need to mix the cytokine with the medium.

Such containers, devices, and methods are known in the art and have been used to expand TILs, and include those described in US. Patent Application Publication No. US 2014/0377739Al, International Publication No.

Application Publication No. us 2013/0115617 A1, ational Publication No. WO 2013/188427 Al, U. S. Patent Application Publication No. US 2011/0136228 A1, U. S. Patent WO 81473 No. US 8,809,050 B2, International publication No.

Application Publication No. US 2016/0208216 A1, US. Patent Application Publication No.

US 2012/0244133 A1, International Publication No.

Application Publication No. US 2013/0102075 A1, US. Patent No. US 8,956,860 B2, International Publication No.

US 2015/0175966 Al, the disclosures of which are incorporated herein by nce. Such processes are also described in Jin er al., J. Immunotherapy, 2012, 35:283-292. Optional Genetic ering of TILs ] In some embodiments, the TILs are optionally genetically engineered to include additional functionalities, including, but not limited to, a high-affinity T cell receptor (TCR), e.g., a TCR targeted at a tumor-associated antigen such as , HER2, or NY-ESO-l, or a chimeric n or (CAR) which binds to a tumor-associated cell surface molecule (e.g., mesothelin) or lineage—restricted cell surface molecule (e.g., CD19).

I. Optional eservation of TILs ] As discussed above in Steps A through E, cryopreservation can occur at us points hout the TIL expansion process. In some embodiments, the bulk TIL population after the first expansion according to Step B or the expanded population of TILs after the one or more second ions according to Step D can be cryopreserved. Cryopreservation can be generally accomplished by placing the TIL population into a freezing solution, e.g., 85% complement inactivated AB serum and 15% dimethyl sulfoxide (DMSO). The cells in solution are placed into cryogenic vials and stored for 24 hours at -80 CC, with optional transfer to gaseous nitrogen freezers for cryopreservation. See, i, er al., Acta Oncologica 2013, 52, 978-986. In some embodiments, the TILs are cryopreserved in 5% DMSO. In some embodiments, the TILs are cryopreserved in cell culture media plus 5% DMSO. In some embodiments, the TILs are cryopreserved according to the methods provided in Examples 8 and 9.

When appropriate, the cells are removed from the freezer and thawed in a 37 °C water bath until approximately 4/5 of the solution is thawed. The cells are generally resuspended in complete media and optionally washed one or more times. In some embodiments, the thawed TILs can be counted and assessed for viability as is known in the J. Phenotypic Characteristics of Expanded TILs In some ment, the TILs are analyzed for expression of numerous phenotype markers after expansion, including those described herein and in the Examples. In an embodiment, expression of one or more phenotypic markers is examined. In some embodiments, the phenotypic characteristics of the TILs are analyzed after the first expansion in Step B. In some ments, the ypic characteristics of the TILs are analyzed during the transition in Step C. In some embodiments, the phenotypic characteristics of the TILs are analyzed during the transition according to Step C and after cryopreservation. In some embodiments, the phenotypic characteristics of the TILs are analyzed after the second expansion ing to Step D, In some embodiments, the phenotypic characteristics of the TILs are analyzed after two or more expansions according to Step D. In some ments, the marker is selected from the group consisting of TCRab, CD57, CD28, CD4, CD27 CD56, CD8a, , CD8a, CCR7, CD4, CD3, CD38, and HLA-DR. In some embodiments, the marker is selected from the group consisting of TCRab, CD57, CD28, CD4, CD27, CD56, and CD8a. In an embodiment, the marker is selected from the group consisting of CD45RA, CD8a, CCR7, CD4, CD3, CD3 8, and HLA-DR. In some embodiments, expression of one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, en, or fourteen markers is examined. In some embodiments, the expression from one or more markers from each group is examined. In some embodiments, one or more of , CD3 8, and CD69 expression is maintained (i.e., does not exhibit a statistically significant difference) in fresh TILs as compared to thawed TILs. In some embodiments, the activation status of TILs is maintained in the thawed TILs.

In an embodiment, expression of one or more regulatory markers is measured. In some embodiments, the regulatory marker is selected from the group consisting of CD137, CD8a, Lag3, CD4, CD3,PD1, TIM-3, CD69, CD8a, TIGIT, CD4, CD3,KLRG1, and CD154. In some embodiments, the regulatory marker is selected from the group consisting of CD137, CD8a, Lag3, CD4, CD3, PD], and THVI-3. In some embodiments, the regulatory marker is selected from the group consisting of CD69, CD8a, TIGIT, CD4, CD3, KLRGl, and CD154. In some embodiments, tory molecule sion is decreased in thawed TILs as compared to fresh TILs. In some embodiments, expression of regulatory molecules LAG-3 and TIM-3 is decreased in thawed TILs as compared to fresh TILs. In some embodiments, there is no cant difference in CD4, CD8, NK, TCRdB expression. In some embodiments, there is no significant difference in CD4, CD8, NK, TCROLB expression, and/or memory markers in fresh TILs as compared to thawed TILs.

In some embodiments the memory marker is selected from the group ting of CCR7 and CD62L In some embodiments, the viability of the fresh TILs as compared to the thawed TILs is at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, or at least 98%. In some embodiments, the viability of both the fresh and thawed TILs is greater than 70%, greater than 75%, greater than 80%, r than 85%, greater than 90%, greater than 95%, or greater than 98%. In some embodiments, the viability of both the fresh and thawed product is greater than 80%, greater than 81%, greater than 82%, greater than 83%, greater than 84%, greater than 85%, r than 86%, greater than 87%, greater than 88%, greater than 89%, or r than 90%. In some embodiments, the viability of both the fresh and thawed product is greater than 86%.

In an embodiment, restimulated TILs can also be evaluated for ne release, using cytokine release assays. In some embodiments, TILs can be ted for interferon-7 (LEN-7) secretion in response to stimulation either with OKT3 or co—culture with autologous tumor digest. For example, in embodiments employing OKT3 stimulation, TILs are washed extensively, and duplicate wells are ed with 1 x 105 cells in 0.2 mL CM in 96-well flat- bottom plates precoated with 0.1 or 1.0 ug/mL of OKT3 diluted in phosphate-buffered saline.

After overnight incubation, the supernatants are harvested and [EN—7 in the supernatant is measured by ELISA (Pierce/Endogen, Woburn, MA). For the co-culture assay, 1 x 105 TIL cells are placed into a 96-well plate with autologous tumor cells. (1 :1 ratio). After a r incubation, supernatants are harvested and [EN-7 release can be quantified, for example by ELISA.

Flow cytometric analysis of cell surface biomarkers: TIL samples were aliquoted for flow cytometric analysis of cell surface markers see, for Example see Examples 7, 8, and 9.

In some embodiments, the TILs are being evaluated for various regulatory markers.

In some embodiments, the regulatory marker is selected from the group consisting of TCR U/B, CD56, CD27, CD28, CD57, CD45RA, CD45RO, CD25, CD127, CD95, IL-2R—, CCR7, CD62L, KLRGl, and CD122. In some embodiments, the regulatory marker is TCR OL/B. In some embodiments, the regulatory marker is CD56. In some embodiments, the regulatory marker is CD27. In some embodiments, the tory marker is CD28. In some embodiments, the tory marker is CD57. In some embodiments, the regulatory marker is CD45RA. In some ments, the regulatory marker is . In some embodiments, the regulatory marker is CD25. In some embodiments, the regulatory marker is CD127. In some embodiments, the regulatory marker is CD95. In some embodiments, the regulatory marker is IL-2R—. In some embodiments, the regulatory marker is CCR7. In some embodiments, the regulatory marker is CD62L. In some embodiments, the regulatory marker is KLRGl. In some embodiments, the regulatory marker is CD122.

K. Metabolic Health of Expanded TILs The restimulated TILs are characterized by significant enhancement of basal glycolysis as compared to either freshly harvested TILs and/or post-thawed TILs.

Spare respiratory capacity (SRC) and ytic reserve can be evaluated for TILs expanded with aEM3 aAPCs in comparison to PBMC s. The Seahorse XF Cell Mito Stress Test measures mitochondrial on by directly measuring the oxygen ption rate (OCR) of cells, using modulators of respiration that target components of the electron ort chain in the mitochondria. The test compounds mycin, FCCP, and a mix of rotenone and antimycin A, described below) are serially injected to measure ATP production, maximal respiration, and non-mitochondrial respiration, tively. Proton leak and spare atory capacity are then calculated using these parameters and basal respiration. Each modulator targets a specific component of the electron transport chain. Oligomycin inhibits ATP synthase (complex V) and the decrease in OCR following injection of oligomycin correlates to the mitochondrial respiration ated with cellular ATP production. Carbonyl cyanide—4 (trifluoromethoxy) phenylhydrazone (FCCP) is an uncoupling agent that collapses the proton gradient and disrupts the mitochondrial membrane ial. As a result, electron flow through the electron transport chain is uninhibited and oxygen is maximally ed by complex IV. The FCCP—stimulated OCR can then be used to calculate spare respiratory capacity, defined as the difference between maximal respiration and basal respiration. Spare respiratory capacity (SRC) is a measure of the y of the cell to respond to increased energy demand. The third ion is a mix of rotenone, a complex I inhibitor, and antimycin A, a complex III inhibitor. This combination shuts down mitochondrial respiration and enables the calculation of nonmitochondrial respiration driven by processes outside the mitochondria.

In some ments, the metabolic assay is basal respiration. In general, second expansion TILs or second additional ion TILs (such as, for example, those described in Step D of Figure 11, including TILs referred to as reREP TILs) have a basal respiration rate that is at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 97%, at least 98%, or at least 99% of the basal respiration rate of freshly harvested TILs. In some ments, the basal respiration rate is from about 50% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the basal respiration rate is from about 60% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the basal respiration rate is from about 70% to about 99% of the basal ation rate of y harvested TILs. In some embodiments, the basal ation rate is from about 80% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the basal respiration rate is from about 90% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the basal respiration rate is from about 95% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the second expansion or second additional expansion TILs (such as, for example, those described in Step D of Figure ll, ing TILs ed to as reREP TILs) have a basal respiration rate that is not statistically significantly different than the basal respiration rate of freshly harvested TILs.

In general, second expansion TILs or additional second expansion TILs, such as those in Step D (including, for example, TILs referred to as reREP which have undergone an additional second expansion) TILs have a spare respiratory ty that is at least is at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 97%, at least 98%, or at least 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare respiratory capacity is from about 50% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare respiratory capacity is from about 50% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare respiratory ty is from about 60% to about 99% of the basal respiration rate of freshly ted TILs. In some embodiments, the spare respiratory capacity is from about 70% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare respiratory ty is from ab out 80% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare respiratory capacity is from about 90% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare respiratory capacity is from about 95% to about 99% of the basal respiration rate of freshly harvested TlLs. In some embodiments, the second expansion TILs or second additional ion TILs (such as, for example, those bed in Step D of Figure ll, including TILs referred to as reREP TILs) have a spare respiratory capacity that is not statistically significantly different than the basal respiration rate of freshly harvested TlLs.

] In general, the second expansion TlLs or second additional expansion TlLs (such as, for example, those bed in Step D of Figure 11, including TILs referred to as reREP TILs) have a spare respiratory capacity that is at least is at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 97%, at least 98%, or at least 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the metabolic assay measured is ytic reserve. In some embodiments, the metabolic assay is ytic reserve. In some embodiments, the metabolic assay is spare respiratory capacity. To measure ar (respiratory) metabolism cells were treated with inhibitors of mitochondrial respiration and glycolysis to determine a metabolic profile for the TIL consisting of the following measures: baseline oxidative orylation (as measured by OCR), spare respiratory capacity, baseline glycolytic activity (as ed by ECAR), and glycolytic reserve. Metabolic profiles were performed using the Seahorse Combination Mitochondrial/Glycolysis Stress Test Assay (including the kit commercially available from Agilent®), which allows for determining a cells’ capacity to perform ysis upon blockage of mitochondrial ATP production. In some embodiments, cells are starved of glucose, then glucose is injected, ed by a stress agent. In some embodiments, the stress agent is selected from the group consisting of oligomycin, FCCP, rotenone, antimycin A and/or 2-deoxyglucose (2-DG), as well as combinations thereof. In some embodiments, oligomycin is added at 10 mM. In some embodiments, FCCP is added at mM. In some embodiments, ne is added at 2.5 mM. In some embodiments, antimycin A is added at 2.5 mM. In some embodiments, 2—deoxyglucose (2-DG) is added at 500 mM. In some embodiments, glycolytic ty, glycolytic reserve, and/or non-glycolytic acidification are measured. In general, TILs have a glycolytic reserve that is at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 97%, at least 98%, or at least 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic reserve is from about 50% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic reserve is from about 60% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic reserve is from about 70% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic reserve is from about 80% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic reserve is from about 90% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic reserve is from about 95% to about 99% of the basal respiration rate of freshly harvested TILs.

In some ments, the metabolic assay is basal ysis. In some embodiments second expansion TILs or additional second expansion TILs, such as those in Step D (including, for example, TILs referred to as reREP which have undergone an additional second expansion) have an increase in basal glycolysis of at least two-fold, at least three-fold, at least four-fold, at least five-fold, at least six-fold, at least 7-fold, at least eight- fold, at least nine—fold, or at least ten—fold. In some embodiments, the second ion TILs or additional second expansion, such as those in Step D (including TILs referred to as reREP TILs) have an increase in basal glycolysis of about two-fold to about ten-fold. In some embodiments, the second expansion TILs or additional second expansion, such as those in Step D (including TILs ed to as reREP TILs) have an increase in basal glycolysis of about two-fold to about eight-fold. In some embodiments, the second expansion TILs or additional second expansion, such as those in Step D (including TILs referred to as reREP TILs) have an se in basal glycolysis of about three-fold to about seven-fold. In some embodiments, the second expansion TILs or additional second ion, such as those in Step D (including TILs referred to as reREP TILs) have an increase in basal glycolysis of about two-fold to about four-fold. In some embodiments, the second expansion TILs or additional second expansion, such as those in Step D (including TILs referred to as reREP TILs) have an increase in basal ysis of about two—fold to about three—fold.

] In general, second expansion TILs or additional second expansion, such as those in Step D (including, for example, TILs referred to as reREP which have undergone an additional second expansion) TILs have a glycolytic reserve that is at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 97%, at least 98%, or at least 99% of the basal respiration rate of y ted TILs. In some embodiments, the glycolytic reserve is from about 50% to about 99% of the basal respiration rate of freshly ted TILs. In some embodiments, the glycolytic reserve is from about 60% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic reserve is from about 70% to about 99% of the basal respiration rate of y harvested TILs. In some embodiments, the ytic reserve is from about 80% to about 99% of the basal respiration rate of freshly harvested TILs. In some ments, the glycolytic reserve is from about 90% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic reserve is from about 95% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the second expansion TILs or second additional ion TILs (such as, for example, those bed in Step D of Figure 11, including TILs referred to as reREP TILs) have a spare respiratory capacity that is not statistically significantly different than the basal respiration rate of y harvested TILs.

Granzyme B Production: Granzyme B is another measure of the ability of TIL to kill target cells. Media supernatants ulated as described above using antibodies to CD3, CD28, and CD137/4—1BB were also evaluated for their levels of Granzyme B using the Human Granzyme B DuoSet ELISA Kit (R & D Systems, Minneapolis, MN) according to the manufacturer’s instructions. In some embodiments, the second ion TILs or second additional expansion TILs (such as, for example, those described in Step D of Figure 11, including TILs referred to as reREP TILs) have increased Granzyme B production. In some embodiments, the second expansion TILs or second additional expansion TILs (such as, for example, those described in Step D of Figure 11, including TILs referred to as reREP T]Ls) have increased cytotoxic activity.

In some embodiments, the present methods include an assay for assessing TIL viability, using the methods as described above. In some embodiments, the TILs are ed as discussed above, ing for example as provided in Figure 11. In some embodiments, the TILs are cryopreserved prior to being assessed for viability. In some embodiments, the viability assessment includes thawing the TILs prior to performing a first expansion, a second expansion, and an additional second expansion. In some ments, the present methods provide an assay for assessing cell eration, cell toxicity, cell death, and/or other terms related to viability of the TIL population. Viability can be measured by any of the TIL metabolic assays described above as well as any s know for assessing cell viability that are known in the art. In some embodiments, the present methods provide as assay for assessment of cell proliferation, cell toxicity, cell death, and/or other terms related to viability of the TILs expanded using the methods described herein, including those exemplified in Figure ll.

The present invention also provides assay methods for determining TIL viability.

The present sure provides methods for assaying TILs for viability by expanding tumor ating lymphocytes (TILs) into a larger population of TILs comprising: (i) obtaining a first population of TILs which has been previously expanded; (ii) performing a first expansion by culturing the first tion of TILs in a cell culture medium comprising IL-2 to produce a second population of TILs, and (iii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold or lOO-fold r in number than the second population of TILs, and wherein the second ion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs, and wherein the third population is further assayed for viability.

In some embodiments, the method further comprises: (iv) performing an additional second expansion by supplementing the cell culture medium of the third population of TILs with additional IL-2, additional OKT-3, and additional APCs, wherein the additional second ion is performed for at least 14 days to obtain a larger population of TILs than ed in step (iii), wherein the larger population of TILs comprises an sed subpopulation of effector T cells and/or central memory T cells relative to the third population of TILs, and wherein the third population is further assayed for viability.

In some embodiments, prior to step (i), the cells are cryopreserved.

] In some embodiments, the cells are thawed prior to performing step (i).

In some embodiments, step (iv) is ed one to four times in order to obtain sufficient TILs for analysis.

In some ments, steps (i) through (iii) or (iv) are performed within a period of about 40 days to about 50 days.

In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 42 days to about 48 days.

In some embodiments, steps (i) through (iii) or (iv) are med within a period of about 42 days to about 45 days.

In some ments, steps (i) through (iii) or (iv) are performed within about 44 days.

In some embodiments, the cells from steps (iii) or (iv) express CD4, CD8, and TCR 0t [3 at levels r to freshly harvested cells.

In some embodiments, the antigen presenting cells are peripheral blood mononuclear cells (PBMCs).

In some embodiments, the PBMCS are added to the cell culture on any of days 9 through 17 in step (iii).

In some embodiments, the effector T cells and/or central memory T cells in the larger population of TILs in step (iv) exhibit one or more characteristics ed from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and sed CD56 expression, relative to effector T cells, and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

In some embodiments, the APCS are artificial APCs ).

In some embodiments, the method further comprises the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a high- affinity T cell receptor.

In some ments, the step of transducing occurs before step (i).

In some embodiments, the method further comprises the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a chimeric antigen receptor (CAR) comprising a single chain variable fragment antibody fused with at least one endodomain of a T-cell signaling molecule.

In some embodiments, the step of transducing occurs before step (i).

In some embodiments, the TILs are assayed for viability.

In some embodiments, the TILs are assayed for ity after cryopreservation.

In some embodiments, the TILs are assayed for viability after cryopreservation and after step (iv).

According to the present disclosure, a method for assaying TILs for ity and/or further use in administration to a subject. In some ments, the method for assay tumor infiltratitng lymphocytes (TILs) comprises: (i) obtaining a first population of TILs; (ii) performing a first expansion by ing the first population of TILs in a cell culture medium comprising IL-2 to produce a second population of TILs, and (iii) performing a second expansion by menting the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold greater in number than the second population of TILs; (iv) harvesting, washing, and cryopreserving the third tion of TILs; (v) storing the cryopreserved TILs at a cryogenic temperature, (vi) thawing the third population of TILs to provide a thawed third population of TILs, and (vii) performing an additional second expansion of a n of the thawed third tion of TILs by supplementing the cell culture medium of the third population with IL—2, OKT-3, and APCs for a reREP period of at least 3 days, wherein the third expansion is performed to obtain a fourth population of TILs, wherein the number of TILs in the fourth population of TILs is compared to the number of TILs in the third population of TILs to obtain a ratio, (viii) determining based on the ratio in step (vii) whether the thawed population of TILs is suitable for administration to a patient, (ix) administering a therapeutically effective dosage of the thawed third population of TILs to the patient when the ratio of the number of TILs in the fourth tion of TILs to the number of TILs in the third population of TILs is determined to be r than 5:1 in step (viii).

In some embodiments, the reREP period is performed until the ratio of the number of TILs in the fourth population of TILs to the number of TILs in the third population of TILs is greater than 50:1.

In some ments, the number of TILs sufficient for a therapeutically effective dosage is from about 2.3X1010 to about 13.7X1010.

In some embodiments, steps (i) through (vii) are med within a period of about 40 days to about 50 days. In some embodiments, steps (i) h (vii) are performed within a period of about 42 days to about 48 days. In some embodiments, steps (i) through (vii) are performed within a period of about 42 days to about 45 days. In some embodiments, steps (i) through (vii) are performed within about 44 days.

] In some embodiments, the cells from steps (iii) or (vii) express CD4, CD8, and TCR 0t [3 at levels similar to freshly harvested cells. In some embodiments the cells are TILs.

In some embodiments, the n presenting cells are peripheral blood mononuclear cells (PBMCs). In some embodiments, the PBMCs are added to the cell culture on any of days 9 h 17 in step (iii).

] In some ments, the effector T cells and/or central memory T cells in the larger population of TILs in steps (iii) or (vii) exhibit one or more characteristics selected from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and decreased CD56 expression, relative to effector T cells, and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

In some embodiments, the APCs are artificial APCs (aAPCs).

In some embodiments, the step of ucing the first population of TILs with an expression vector comprising a nucleic acid encoding a high-affinity T cell receptor.

In some ments, the step of transducing occurs before step (i).

In some embodiments, the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a chimeric antigen receptor (CAR) comprising a single chain variable fragment antibody fused with at least one endodomain of a T-cell ing molecule.

In some embodiments, the step of transducing occurs before step (i).

In some embodiments, the TILs are assayed for viability after step (vii).

The present disclosure also provides further methods for assaying TILs. In some embodiments, the disclosure provides a method for assaying TILs comprising: (i) obtaining a portion of a first tion of cryopreserved TILs, (ii) thawing the portion of the first population of cryopreserved TILs; (iii) performing a first ion by culturing the portion of the first population of T]Ls in a cell culture medium comprising 11—2, OKT-3, and antigen presenting cells (APCs) for a reREP period of at least 3 days, to produce a second population of TILs, wherein the portion from the first population of TILs is compared to the second population of TILs to obtain a ratio of the number of TILs, wherein the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 5: 1, (iv) determining based on the ratio in step (iii) whether the first population of TILs is suitable for use in therapeutic administration to a patient; (v) determining the first population of TILs is le for use in therapeutic administration when the ratio of the number of TILs in the second population of TILs to the number of TILs in the first tion of TILs is ined to be greater than :1 in step (iv).

In some embodiments, the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 50:1.

In some embodiments, the method further comprises ming expansion of the entire first population of cryopreserved TILs from step (i) according to the methods as described in any of the embodiments provided herein.

In some ments, the method r comprises administering the entire first population of cryopreserved TILs from step (i) to the patient.

] In some embodiments, the cryopreserved TILs are thawed and a second expansion performed to determine if the cells expand sufficiently. If the cells expand to a ratio of at least 5: l, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 10:1, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 15:1, the TILs are sufficiently viably for stration to the patient. If the cells expand to a ratio of at least 20:1, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 25:1, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least :], the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 35:1, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 40: l, the TILs are ently viably for administration to the t. If the cells expand to a ratio of at least 45:1, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 5:], the TILs are sufficiently viably for administration to the patient.

The present disclosure also provides further methods for assaying TILs. In some embodiments, the sure es a method for assaying TILs sing: (i) obtaining a portion of a first population of cryopreserved TILs, (ii) thawing the portion of the first population of eserved TILs, (iii) performing a first expansion by culturing the portion of the first population of TILs in a cell culture medium comprising IL-2, OKT-3, and antigen presenting cells (APCs) for a reREP period of at least 3 days, to produce a second population of TILs, wherein the portion from the first population of TILs is compared to the second population of TILs to obtain a ratio of the number of TILs, wherein the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 5: 1; (iv) determining based on the ratio in step (iii) whether the first population of TILs is suitable for use in therapeutic stration to a patient; and (v) therapeutically administering the der of the first population of TILs to the patient when the ratio of the number of TILs in the second population of TILs to the number of TILs in the first population of TILs is determined to be greater than 5:1 in step (iv).

In some embodiments, the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILS is r than 50:1.

In some embodiments, the method further comprises performing ion of the entire first population of cryopreserved TILs from step (i) according to the methods of any of the preceding claims.

In some embodiments, the method further comprises administering the entire first population of cryopreserved TlLs from step (i) to the patient.

In some embodiments, the method further comprised the step of assessing the metabolic health of the second population of TILs.

] In some embodiments, the method further comprises the step of assessing the phenotype of the second population of TILs.

In some embodiments, the antigen presenting cells are allogeneic peripherial blood mononuclear cells.

L. Methods of Treating Patients Methods of treatment begin with the initial TIL collection and culture of TILs. Such methods have been both described in the art by, for example, Iin el al. (J. Immunolhempy, 2012, 283—292), incorporated by reference herein in its entirety. As well as described throughout the Examples n below.

The present invention provides novel methods for TIL generation that have not been previously described, e. g, TILs produced according to Steps A through F. The expanded TILs produced according to Steps A through F above or as otherwise produced as described herein find particular use in the treatment of patients with cancer. General methods of using TILs for the treatment of cancer have been described in Goff, et al., J. Clinical Oncology, 2016, 34(20):2389-239, as well as the supplemental content; incorporated by reference herein in its entirety.) Similarly, the TILs produced according to the present invention can also be used for the treatment of cancer. In some embodiments, TIL were grown from ed deposits of metastatic melanoma as previously described (see, Dudley, et al., JImmunother., 2003, 26:332-342, incorporated by reference herein in its entirety). Fresh tumor can be dissected under sterile conditions. A representative sample can be collected for formal ogic analysis. Single nts of 2 mm3 to 3 mm3. In some embodiments, 5, 10, 15, , 25 or 30 samples per patient are obtained. In some embodiments, 20, 25, or 30 samples per patient are obtained. In some embodiments, 20, 22, 24, 26, or 28 samples per patient are obtained, In some embodiments, 24 samples per patient are ed. Samples can be placed in individual wells of a 24-well plate, maintained in growth media with ose IL-2 (6,000 IU/mL), and monitored for destruction of tumor and/or proliferation of TIL. Any tumor with viable cells remaining after sing can be tically ed into a single cell suspension and cryopreserved, as described herein.

In some ments, expanded TILs can be sampled for phenotype analysis (CD3, CD4, CD8, and CD56) and tested t autologous tumor when available. TILs can be ered reactive if overnight co-culture yielded interferon-gamma (IFN—y) levels > 200 pg/mL and twice background. (Goff, et al., JImmunother., 2010, 33:840-847, incorporated by reference herein in its entirety). In some embodiments, cultures with evidence of autologous reactivity or sufficient growth patterns can be selected for a second expansion (for example, a second expansion as provided in according to Step D of Figure 11), including second expansions that are sometimes referred to as rapid expansion (REP). In some embodiments, expanded TILs with high autologous reactivity (for example, high proliferation during a second expansion), are selected for an additional second expansion. In some embodiments, TILs with high autologous reactivity (for example, high eration during second expansion as provided in Step D of Figure 11), are selected for an additional second expansion according to Step D of Figure 11.

In some embodiments, the patient is not moved directly to ACT (adoptive cell transfer), for example, in some embodiments, after tumor harvesting and/or a first expansion, the cells are not ed immediately. In such embodiments, TILs can be cryopreserved and thawed 2 days before the second ion step (for example, in some embodiments, 2 days before a step referred to as a REP step). In such embodiments, TILs can be cryopreserved and thawed 2 days before the second expansion step (for example, in some embodiments, 2 days before a Step D as provided in Figure 11). As described in various embodiments throughout the present application, the second ion ding processes referred to as REP) used OKT3 (anti-CD3) antibody (Miltenyi Biotech, San Diego, CA) and IL-2 (3,000 IU/mL, heus, San Diego, CA) in the presence of irradiated feeder cells, autologous when le, at a 100:1 ratio (see, Dudley, et al., J Immunother., 2003, 26:332-342; incorporated by reference herein in its entirety). In some embodiments, the TILs can be cryopreserved and thawed 5 days before the second expansion step. In some ments, the TILs can be cryopreserved and thawed 4 days before the second expansion step. In some embodiments, the TILs can be cryopreserved and thawed 3 days before the second expansion step. In some embodiments, the TILs can be cryopreserved and thawed 2 days before the second expansion step. In some embodiments, the TILs can be eserved and thawed 1 day before the second expansion step. In some embodiments, the TILs can be cryopreserved and thawed immediately before the second expansion step.

Cell phenotypes of cryopreserved samples of infusion bag TIL can be analyzed by flow try (FlowJo) for surface markers CD3, CD4, CD8, CCR7, and CD45RA (BD BioSciences), as well as by any of the methods described herein. Serum cytokines were measured by using standard enzyme-linked immunosorbent assay techniques. A rise in serum IFN-g was defined as >100 pg/mL and greater than 4 3 baseline levels. 1. Optional Lymphodepletion Preconditioning of ts Experimental findings indicate that lymphodepletion prior to adoptive er of tumor-specific T lymphocytes plays a key role in ing ent efficacy by eliminating regulatory T cells and competing elements of the immune system (‘cytokine sinks’).

Accordingly, some embodiments of the invention e a lymphodepletion step (sometimes also referred to as “immunosuppressive conditioning”) on the t prior to the uction of the second expansion TILs or second additional expansion TILs (such as, for example, those described in Step D of Figure ll, including TILs referred to as reREP TILs) of the invention.

In general, lymphodepletion is done using bine and/or cyclophosphamide (the active form being referred to as mafosfamide) and combinations thereof. Such methods are described in Gassner et al. (Cancer Immunol ther. 2011, 60(1):75—85, Muranski, et al., Nat Clin Pracl Oncol, 2006 3(l2):668—68l, Dudley, et al., J Clin Oncol 2008, 3-5239, and Dudley, et al., JClz'n Oncol. 2005, 23(10):2346—23 57, all ofwhich are incorporated by reference herein in their entireties.

In some embodiments, the fludarabine is at a concentration of 0.5 [lg/ml -10 ug/ml fludarabine (Sigma-Aldrich, MO, USA). In some embodiments, the fludarabine is at a concentration of l ug/ml fludarabine (Sigma-Aldrich, MO, USA). In some embodiments, the fludarabine treatment is for 1 day, 2 days, 3 days, 4 days, 5 days, 6 days, or 7 days or more.

In some embodiments, the fludarabine is stered at a dosage of 10 mg/kg/day, mg/kg/day, 20 mg/kg/day, 25 mg/kg/day, 30 mg/kg/day, 35 mg/kg/day, 40 mg/kg/day, or 45 mg/kg/day. In some embodiments, the fludarabine treatment is for 2-7 days at mg/kg/day. In some embodiments, the fludarabine treatment is for 4-5 days at mg/kg/day. In some embodiments, the fludarabine treatment is for 4-5 days at mg/kg/day.

In some embodiments, the mafosfamide, the active form of cyclophosphamide, is at a concentration of 0.5 ug/ml -10 ug/ml. In some embodiments, the mafosfamide, the active form of cyclophosphamide, is at a concentration of 1 ug/ml. In some embodiments, the cyclophosphamide treatment is for 1 day, 2 days, 3 days, 4 days, 5 days, 6 days, or 7 days or more. In some embodiments, the cyclophosphamide is administered at a dosage of 100 mg/mZ/day, 150 mg/mZ/day, 175 mg/m2/day, 200 mg/mZ/day, 225 mg/mZ/day, 250 day, 275 mg/mz/day, or 300 mg/mZ/day. In some embodiments, the cyclophosphamide is administered intravenously (7.6., i.v.) In some embodiments, the hosphamide treatment is for 2-7 days at 35 mg/kg/day. In some embodiments, the cyclophosphamide ent is for 4-5 days at 250 mg/mZ/day iv. In some embodiments, the cyclophosphamide treatment is for 4 days at 250 mg/mZ/day i.v.

In some embodiments, the fludarabine and the cyclophosphamide are administered er to a patient. In some ments, fludarabine is administered at 25 mg/mZ/day iv. and cyclophosphamide is administered at 250 mg/mZ/day i.v. over 4 days.

This ol includes administration of fiudarabine (25 mg/mZ/day iv.) and cyclophosphamide (250 mg/mZ/day iv.) over 4 days. 2, Exemplary Treatment Embodiments ] In some embodiments, the present disclosure provides a method of ng a cancer with a population of tumor infiltrating lymphocytes (TILs) comprising the steps of (a) obtaining a first tion of TILs from a tumor resected from a patient; (b) performing an initial expansion of the first population of TILs in a first cell culture medium to obtain a second population of TILs, wherein the second population of TILs is at least 5-fold greater in number than the first population of TILs, and wherein the first cell culture medium comprises IL-2, (c) performing a rapid expansion of the second population of TILs using a population of myeloid artificial antigen presenting cells (myeloid aAPCs) in a second cell culture medium to obtain a third population of TILs, wherein the third population of TILs is at least 50-fold greater in number than the second population of TILs after 7 days from the start of the rapid expansion; and wherein the second cell culture medium ses IL-2 and OKT-3; (d) administering a therapeutically effective portion of the third population of TILs to a patient with the cancer. In some embodiments, the IL-2 is present at an initial concentration of about 3000 IU/mL and OKT-3 antibody is present at an initial concentration of about 30 ng/mL in the second cell culture . In some embodiments, first expansion is performed over a period not greater than 14 days. In some embodiments, the first ion is performed using a gas permeable container. In some embodiments, the second expansion is performed using a WO 81473 gas permeable container. In some embodiments, the ratio of the second population of TILs to the population of aAPCs in the rapid expansion is between 1 to 80 and l to 400. In some embodiments, the ratio of the second population of TILs to the population of aAPCs in the rapid expansion is about 1 to 300. In some embodiments, the cancer for treatment is selected from the group consisting of melanoma, ovarian cancer, cervical cancer, non-small-cell lung cancer (NSCLC), lung , bladder cancer, breast , cancer caused by human papilloma virus, head and neck cancer, renal cancer, and renal cell carcinoma. In some embodiments, the cancer for ent is selected from the group consisting of melanoma, ovarian cancer, and cervical cancer. In some embodiments, the cancer for ent is melanoma. In some embodiments, the cancer for treatment is ovarian . In some embodiments, the cancer for treatment is cervical cancer. In some embodiments, the method of treating cancer further comprises the step of ng the patient with a non-myeloablative depletion regimen prior to administering the third population of TILs to the patient. In some embodiments, the non-myeloablative lymphodepletion regimen comprises the steps of administration of cyclophosphamide at a dose of 60 mg/m2/day for two days followed by stration of fludarabine at a dose of 25 mg/mZ/day for five days. In some embodiments, the high dose IL-2 n comprises 600,000 or 720,000 IU/kg of aldesleukin, or a biosimilar or variant thereof, administered as a 15-minute bolus intravenous infusion every eight hours until tolerance. 3. Methods of co-administration In some embodiments, the TILs produced as described herein in Steps A through F can be administered in combination with one or more immune oint regulators, such as the antibodies described below. For example, dies that target PD-l and which can be co—administered with the TILs of the present invention include, e.g, but are not limited to nivolumab (EMS-93 6558, Bristol-Myers Squibb; Opdivo®), pembrolizumab olizumab, MK03475 or MIC-3475, Merck, Keytruda®), humanized D-l antibody J8001 (ShangHai JunShi), monoclonal anti—PD—l antibody TSR-042 (Tesaro, Inc.), Pidilizumab PD-l mAb CT-Ol l, Medivation), anti-PD-l monoclonal Antibody BGB- A317 (BeiGene), and/or anti-PD-l antibody SHR-lZlO (ShangHai HengRui), human monoclonal antibody 10 (Regeneron), human monoclonal antibody MDX—1106 (Bristol-Myers Squibb), and/or humanized anti-PD-l IgG4 antibody PDROOl (Novartis). In some embodiments, the PD-l antibody is from clone: RMPl-l4 (rat IgG) - BioXcell cat# BPOl46. Other suitable antibodies suitable for use in co-administration methods with TILs produced according to Steps A through F as described herein are D-l antibodies sed in US. Patent No. 8,008,449, herein incorporated by reference. In some embodiments, the antibody or antigen-binding portion thereof binds specifically to PD-Ll and inhibits its interaction with PD-l, thereby increasing immune ty. Any antibodies known in the art which bind to PD-Ll and disrupt the interaction between the PD-l and PD- L1, and stimulates an anti- tumor immune response, are suitable for use in co-administration s with TILs produced according to Steps A through F as described herein. For example, antibodies that target PD-Ll and are in clinical trials, include EMS-936559 (Bristol-Myers Squibb) and MPDL3280A tech). Other suitable antibodies that target PD-Ll are disclosed in US. Patent No. 7,943,743, herein incorporated by reference. It will be understood by one of ordinary skill that any antibody which binds to PD-l or PD-Ll, disrupts the PD-l/PD-Ll interaction, and stimulates an anti-tumor immune response, are suitable for use in co—administration methods with TILs produced according to Steps A through F as described herein. In some embodiments, the subject administered the combination of TILs produced according to Steps A through F is co-administered with a and D-l antibody when the patient has a cancer type that is refractory to administration of the anti-PD-l antibody alone. In some embodiments, the patient is stered TILs in combination with and anti-PD-l when the patient has refactory melanoma. In some ments, the t is stered TILs in combination with and anti-PD-l when the t has non-small cell lung carcinoma ). 4. Adoptive Cell Transfer Adoptive cell transfer (ACT) is a very effective form of immunotherapy and involves the transfer of immune cells with antitumor ty into cancer patients. ACT is a treatment approach that involves the identification, in vitro, of lymphocytes with antitumor activity, the in vitro expansion of these cells to large numbers and their on into the cancer-bearing host. Lymphocytes used for adoptive transfer can be derived from the stroma of resected tumors (tumor infiltrating lymphocytes or TILs). TILs for ACT can be prepared as described herein. In some embodiments, the TILs are prepared, for e, according to a method as described in Figure 11. They can also be derived or from blood if they are genetically engineered to express antitumor T—cell receptors (TCRs) or chimeric antigen receptors (CARS), enriched with mixed lymphocyte tumor cell cultures (MLTCs), or cloned using autologous antigen ting cells and tumor derived peptides. ACT in which the lymphocytes originate from the cancer-bearing host to be infused is termed autologous ACT.

WO 81473 U. S. ation No. 2011/0052530 relates to a method for performing adoptive cell therapy to promote cancer regression, primarily for treatment of patients suffering from metastatic melanoma, which is incorporated by reference in its ty for these methods.

In some ments, TILs can be administered as described herein. In some embodiments, TILs can be administered in a single dose. Such administration may be by injection, e.g., intravenous injection. In some embodiments, TILs and/or cytotoxic lymphocytes may be administered in multiple doses. Dosing may be once, twice, three times, four times, five times, six times, or more than six times per year. Dosing may be once a month, once every two weeks, once a week, or once every other day. Administration of TILs and/or cytotoxic lymphocytes may continue as long as necessary.

I. Exemplary Embodiments In an embodiment, the invention provides a method for expanding tumor infiltrating lymphocytes (TILs) comprising: (a) obtaining a first population of TILs from a tumor resected from a patient; (b) performing an initial expansion of the first population of TILs in a first cell culture medium to obtain a second population of TILs, wherein the first cell culture medium comprises IL-2, (c) performing a rapid expansion of the second population of TlLs, n the third tion of TlLs is at least lOO-fold greater in number than the second population of TILs, and wherein the second cell culture medium comprises IL-2, OKT-3, and peripheral blood mononuclear cells (PBMCs), n the rapid expansion is performed for at least 14 days, (d) removing the cells from the second cell culture medium and optionally cryopreserving the cells in a storage medium to obtain a third population of cells; (e) ally thawing the third population of cells, and (f) performing a second rapid ion of the third tion of TlLs in a third cell culture medium, wherein the third cell culture medium comprises IL—2, OKT-3, and peripheral blood mononuclear cells (PBMCs), wherein the second rapid expansion is performed for at least 14 days, to obtain a fourth population of TILs, wherein the fourth population of cells exhibits an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs; and g) optionally, repeating step f) one or more times.

In an embodiment, the invention provides that said ulated cells express CD4, CD8 and TCR 0t [3 at levels similar to freshly harvested cells.

In an embodiment, the invention provides that said reREP medium ses peripheral blood mononuclear cells (PBMCs).

In an ment, the invention provides that said PBMCs are added to the TILs on any of days 9 through 17. In some ments, the invention provides that said PBMCs are added to the TlLs on days 9, 10, ll, 12, l3, 14, 15, 16, and/or 17.

In an embodiment, the invention provides that said reREP medium comprises aAPCs.

In an embodiment, the invention provides that the cryopreserved TILs were transduced with an expression vector comprising a nucleic acid encoding a high-affinity T cell receptor.

In an embodiment, the invention provides that the cryopreserved TILs were uced with an expression vector comprising a nucleic acid encoding a chimeric antigen or (CAR) comprising an immunoglobulin light chain fused with an endodomain of a T- cell signaling molecule.

In an ment, the invention provides that restimulated TILs are infused into a patient.

In an embodiment, the invention provides that step (1) further comprises ng the cells from the second cell culture medium.

In an ment, the invention provides that step i) is repeated a sufficient number of times in order to obtain sufficient TILs for a therapeutic dosage of said TILs.

In an embodiment, the invention provides a population of restimulated TILs made according to the s described above and herein.

In an embodiment, the invention provides a population of restimulated TILs made according to the method of claim 1 wherein said restimulated TILs have at least a two- fold increase in basal ysis as compared to said thawed cryopreserved TILs.

In an embodiment, the invention provides a method for assessing the metabolic activity of a TIL cell population sing measuring the basal glycolysis of said cells In an embodiment, the invention provides a method for assessing the metabolic activity of a TIL cell population comprising measuring the basal respiration of said cells.

In an embodiment, the invention provides a method for assessing the metabolic activity of a TIL cell population sing measuring the spare respiratory capacity (SRC) of said cells.

In an embodiment, the invention provides a method for assessing the metabolic ty of a TIL cell tion comprising ing the glycolytic reserve of said cells.

In an embodiment, the invention provides a method of treating cancer in a patient with a population of tumor infiltrating cytes (TILs) comprising the steps of: a) obtaining a primary TIL population from said patient, b) rapidly ing said primary TIL population to form an expanded TIL population, c) cryopreserving said expanded population to form a cryopreserved TIL population; (1) thawing said cryopreserved TIL population, 6) culturing said cryopreserved TIL population in media comprising IL-2 and anti- CD3 dy to form a reREP TIL population, and f) administering a therapeutically effective amount of reREP TIL cells to said patient.

In an embodiment, the invention provides a method for expanding tumor infiltrating lymphocytes (TILs) comprising: (a) obtaining a first population of TILs from a tumor resected from a patient (b) performing an initial ion of the first tion of TILs in a first cell culture medium to obtain a second population of TILs, wherein the first cell culture medium comprises IL—2; (c) performing a rapid expansion of the second population of TlLs, wherein the third population of TlLs is at least lOO-fold greater in number than the second population of TILs, and wherein the second cell culture medium comprises IL-2, OKT-3, and peripheral blood mononuclear cells (PBMCs), wherein the rapid ion is performed for at least 14 days; (d) removing the cells from the second cell culture medium and optionally cryopreserving the cells in a storage medium to obtain a third population of cells; (e) ally thawing the third population of cells; (f) performing a second rapid expansion of the third population of TlLs in a third cell culture medium, wherein the third cell culture medium comprises IL-2, OKT-3, and peripheral blood mononuclear cells (PBMCs), wherein the second rapid ion is med for at least 14 days, to obtain a fourth population of TILs, wherein the fourth population of cells exhibits an sed subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs, and (g) administering a therapeutically effective amount of reREP TIL cells to said In an embodiment, the invention provides that step d) further comprises removing the cells from the second cell culture medium.

In an ment, the invention provides that step f) is repeated a sufficient number of times in order to obtain sufficient TILs for a therapeutic dosage of said TILs.

EXAMPLES EXAMPLE 1: RESTIMULATION PROTOCOL As discussed , a restimulation protocol and assay were developed utilizing fresh antigen restimulation following harvest or thaw of TILs grown in a REP.

The purpose of this example was to test the eration/expansion of post REP Tumor Infiltrating Lymphocytes in a Re—stimulation assay. Post REP TIL (post Step D TIL according to Figure 11) were be restimulated with allogeneic PBMC feeder cells, anti-CD3 (clone OKT3) antibody, and interleukin-2 (IL-2). Viable cells were counted on Day 7 and The post REP TIL (post Step D TIL according to Figure 11) were infused into the patients who were previously lymphodepleted to facilitate TIL survival and expansion in viva. Once the TIL were re-infused into the patient, they encountered antigen, resulting in the activation of the TIL, but the TIL were ultimately short-lived. Re-stimulation of the TIL through antigen contact together with exposure to IL-2 during ACT may result in TIL proliferation and tumor l or may lead to deletion through apoptosis (activation induced cell death) or induction of a oliferative (anergic) state due to lack of appropriate co- stimulation. Without being bound by theory, restimulation of post REP TIL mulation of, for example post Step D TIL according to Figure 11) with allogeneic PBMC feeder cells may mimic the in vivo process by providing antigen stimulation and necessary cytokines for TIL expansion. Post REP TIL (post Step D TIL according to Figure 11) were activated through ne receptors on the feeder MNCS that bind to anti-CD3 (clone OKT3) antibody and crosslink to TIL in the REP flask, stimulating the TIL to expand.

Proliferation/Expansion of Post REP Tumor Infiltrating Lymphocytes in a Re- stimulation assay Post REP (post Step D TIL ing to Figure ll) TIL were restimulated with allogeneic PBMC feeder cells, anti-CD3 (clone OKT3) antibody, and interleukin-2 (IL-2).

Viable cells were counted on Day 7 and recorded.

In some embodiments, this ure can also be applied to test or te the current REP protocol.

Table 3: DEFINITIONS AND ABBREVIATIONS AOPI Acridine Oran_e Pro.idium Iodide BSC Biolo_ical Safet Cabinet BSL2 Biosafet Level 2 CM1 Com.1ete Medium for TIL, #1 CM2 Com .lete Medium for TIL, #2; 50:50 mixture of CMl and AIM-V GMP Good Manufacturin; Processin_ —_IPA Iso..ro 1 alcohol LN2 Licuid nitroen MNC; PBMC Mononuclear Cells; Peri .heral Blood Mononuclear Cells m1 Milliliter NA Not a..1icab1e NR Not recuired MACS® GMP CD3 .ure clone OKT3 antibod Personal .rotective e . ui . ment Initial TIL cultures ori_inatin from tumor frag Ra . id EX . ansion Protocol San Die_o Blood Bank Tumor atin_ L m.hoc te Table 4: Materials GleOTM/Llfe 087-0112DK Technolo; eter ViaStainTM NA Nexcelom CS2-0106 2-8°C AOPI Stainin_ Solution Disposable NA Nexcelom CP2-001 RT Hemac tometer Prepared as per CMl NA NA 2-8°C Exam 1e 5 GMP recombinant 6 x 106 IU/ml stock human 1L-2 2) solution prepared as per CellGenix 1020—1000 -20°C Example 4 MACS® GMP CD3 pure GMP Miltenyi Biotec 170116 2-8°C clone OKT3 antibod 50ml conical tubes sterile Any in use RT transfer pipets e Any in use RT SCGPUOSRE or 500ml filter system EMD/Millipore sterile RT or ecuivalent ecuivalent l tissue culture r or 662160 or sterile RT .lates e . uivalent e . uivalent 5ml, 10ml serological sterile ————_ ———_— Table 5: SPECIMENS Cryopreserved and Gamm Stored freezer B N irradiated MNC Feeder lots Post-REP TIL cells Fresh or Frozen in Iovance NA NA freezer Biotechnoloies The post REP (post Step D TIL according to Figure 11) TIL were infused into the patients who were prior lymphodepleted to facilitate TIL survival and expansion in vivo.

Once the TIL were re-infused into the patient, they encountered antigen, resulting in the tion of the TIL, but the TIL were ultimately short-lived. Re-stimulation of the TIL through n contact together with exposure to IL-2 during ACT may result in TIL proliferation and tumor control or may lead to deletion through apoptosis (activation induced cell death) or ion of a non-proliferative (anergic) state due to lack of appropriate co- stimulation. Our hypothesis was that restimulation of post REP TIL with allogeneic PBMC feeder cells mimicked the in vivo process by providing antigen stimulation and necessary cytokines for TIL expansion. Post REP TIL were activated through membrane receptors on the feeder MNCs that bind to anti-CD3 (clone OKT3) antibody and crosslink to TIL in the REP flask, stimulating the TIL to .

PROCEDURE Either fresh EP (post Step D TIL according to Figure 11) or frozen post-REP (post Step D TIL according to Figure 11) TIL that was thawed, was washed once in CMl media. The Re-REP (repeat of Step D according to Figure 11) was set up in a 24 well tissue culture plate with 2 X 106 MNC feeder cells, 30 ng/ml OKT3, l x 104 post-REP TIL plus 3,000 IU/ml rhIL-2 in CMZ. The cultures were incubated for seven days in a 5% C02, 37°C humidified incubator at which point viable cell ry and viability was determined. The fold ion of TIL was calculated based on the viable cell counts.

ReREP- Day 0 Prepare TIL WO 81473 TILs were obtained from fresh post REP or frozen post REP. TIL cultures were removed from the incubator and erred to the BSC. Next, 200ul was removed for a cell count using the Cellometer K2. Counts were recorded.

Prepare Feeder Cells For this protocol a m of 20 X 106 feeder cells were needed. Each 1 ml vial frozen by SDBB had 100 X 106 viable cells upon freezing. Assuming a 50% recovery upon thaw from LN2 storage, it was recommended to thaw at least two vials of feeder cells per lot giving an estimated 100 X 106 viable cells for each REP. Before thawing feeder cells, approximately 50ml of CM2 was pre—warmed without rhIL—2 for each feeder lot that was tested. The designated feeder lot vials were removed from LN2 storage and placed on ice.

Vials were transferred to the tissue culture room. Vials were thawed in a 37°C water bath.

Vials were transferred to BSC and sprayed or wiped with 70% EtOH or IPA. Using a transfer pipette, the contents of feeder vials was immediately transferred into 50 mL of warm CM2 in a 50-mL conical tube. 200 pl was removed for cell counting using the Cellometer K2. Counts were recorded. Cells were centrifuged at 350 X g for 10 minutes. The supernatant and resuspended cells were aspirated in a desired volume at 2 X 106cells/ml in warm CM2 plus 3000 IU/ml rhIL-2.

Prepare CM2 + 3000 IU/ml working solution A ient amount of CM2 was ed for the conditions needed. Each well contained 2 ml of CM2. Each well was supplemented the CM2 with 3000 IU/mL of rhIL—2.

From the stock of 6 XlO6 IU/mL, 50 ul was needed for each 100 ml of CM2.

Prepare MACS® GMP CD3 pure (OKT3) working on Stock solution of OKT3 (1 mg/ml) was taken out of the 4°C refrigerator. A final tration of 30 ng/ml OKT3 was used in the REP. 60 ng of OKT3 were needed for 2 ml of CM2 medium in each 24 well. TIL + Feeders, TIL alone and Feeders alone conditions were cultured in triplicates. For each feeder lot tested, 1000 ul of a 1:1000 dilution of lmg/ml OKT3 for a working concentration of lug/ml (1,000 ng/ml) was made. For 9 wells, 1000 ul ofa 1:1000 dilution of lmg/ml OKT3. 1 pl 1 mg/ml OKT3 + 999 pl of CM2 with 3000 IU/ml IL-2 was made.

Prepare 24 Well plate and Coculture.

Each ReREP tested required 9 wells of 24 well plate.

Each plate was labeled with Experiment Name, Feeder Lot #, EP TIL designation, date, and operator initials. Each plate was filled with components as listed in Table 8. Each component was added and each well filled with a total of 2 ml and place the plates into 37°C incubator. Plates were mixed carefully 3 times using 1 ml pipette.

Table 6: REP set-up in 24 well plate Order of addition to single well of 24 TIL + Feeders + TIL Feeders + well plate OKT3 +OKT3 OKT3 TIL cells (1 x 104/05 ml) in -2 500 pl 500 pl _ PBMC feeder cells (2x106/l ml) in 1000 ul 1000 ul CM2+IL-2 OKT3 (1000 ng/ml) in CM2+IL-2 60 “1 60 pl 60 pl CM2 +1L-2 440 ul 1440 pl 940 pl Total Volume 2000 ul 2000 ul 2000 ul Media exchange — Day 5 CM2 was prepared with 3000 IU/ml . 10ml was needed. 1 ml of the media was removed from each well and discarded. With a 1 ml pipette, 1 ml warm CM2 with 3000 IU/mL rhIL-2 was transferred to each well, The plates were returned to the incubator.

Harvest — Day 7 Using a 1 ml serological pipet, each well was mixed to break up any clumps of cells. After thoroughly mixing cell suspension by pipetting, 200ul was removed for cell counting using the Cellometer K2. All the conditions were counted and recorded for TIL +Feeders +OKT3, TIL +OKT3, and FEEDERS +OKT3.

In addition to 24 well ReREP, te reREP were set up in 4 upright T25 tissue culture flasks with 1.3 x 107 MNC feeder cells, 30 ng/ml OKT3, 0.65 x 105 pre-REP TIL plus 3,000 IU/ml rhIL-2 in CM2. Note: Please refer to tion of Irradiated Allogeneic Feeder Cells for Rapid Expansion Protocol of LN—144 (Example 6). tion of cells for functional assays: Table 7: Assay Flow Phenotyping 106 Potency — P815effLuc-eGFP 406 For restimulation assay to Granzyme-B, IFN— _amma Metabolism 26 TCR Sequencing 16 Store culture supernatant of TIL+ feeders and feeders alone for Multi lex ELISA EVALUATION/ACCEPTANCE CRITERIA Table 8: ance Criteria Used At least a 50fold ex-ansion of Post REP TIL With feeders No expansmn and at least 20%) reduction in the total V1able. 0 . . .

PBMC Feeders cells alone number of feeder cells Reference ures — Included in Examples below Table 9: Reference Procedures ination of Cell Count and e 2 Viability of TIL Cultures Using the Cellometer K2 Cell Counter -_—CellGenix _CMMedia Formulation Example 5 -Evaluation ofIrradiated AllogeneicFeeder Cells for Rapid ExpansionProtocol ofLN— 144 infiltratin_ L m hoc te after Post REP -Validating the post REP cryofrozenTIL oroduct EXAMPLE 2: DETERMINATION OF CELL COUNT AND VIABILITY OF TIL CULTURES USING THE CELLOMETER K2 CELL COUNTER This example provides exemplary ctions for how the operation of the Cellometer K2 Image Cytometer automatic cell counter was d out.

Scope: Determination of the total cell count and viability of cell cultures.

Table 10. Definitions Microliter Acridine Orane Pro.idium Iodine ical Safe Cabinet Dulbecco’s Phos hate Buffered Saline Milliliter Mononuclear Blood Cells Not A. .licable Peri .heral Blood Mononuclear Cells PPE Personal Protective Equipment Pre-REP Initial TIL culture before Rapid Expansion Protocol of culture REP Rapid Expansion Protocol TIL Tumor Infiltrating Lymphocytes PROCEDURE Cell sion preparation Tflpan Blue Preparation The final Trypan blue concentration was 0.1%. The manufacturer recommended preparing a stock on of 0.2%. When using Trypan blue on the Cellometer K2, the stock (0.4 %) with PBS was diluted to 0.2 %. The Trypan blue was filtered with a 0.2-0.4 micron filter and aliquoted in small volumes into labeled, capped tubes. The cell suspension was mixed at 1:1 with 0.2 % trypan blue.

AOPI Preparation When using AOPI on the Cellometer K2, the AOPI on was obtained. Cell samples were stained at 1:1 with AOPI on. NOTE: When counting high concentration cultures, the cell samples were diluted in cell culture medium prior to the final 1:1 dilution with Trypan Blue or AOPI. The manufacturer’s suggested range of counting was used to determine the best on to use.

Cellometer K2 Set—Up The eter K2 equipment was turned on. The Cellometer Image Cytometer icon was selected on the ated computer monitor. On the main screen of the software, one of the Assays listed in the dropdown box was selected. When selecting the appropriate Assay, the Cell Type and Image Mode self-populated. Under “Sample” section, Set User/Sample ID was d to open r screen to input operator’s information for specimen. “User ID” was entered. This consisted of the user’s three letter initials. Enter “Sample ID”. The sample ID was derived from incoming specimen information.

Setup dilution parameters When no other dilution was made besides the 1:1 e, the dilution factor was 2.

When a dilution was made prior to the final 1:] mixture, the dilution factor was 2 times of the prior on. The dilution factor was updated according to the mixture used.

Cell Counting The plastic backing was removed from both sides of a Cellometer counting chamber slide (SDlOO) and placed on top of a clean, lint-free wipe. After preparing the cell suspension, a small aliquot of the sample was removed and transferred into a well of a multiwell cell culture plate or tube. When diluting the sample, the dilution was med using cell culture medium. 20 ul of cell suspension was added into a well of the multiwell cell culture plate or tube. 20ul of 0.2% trypan blue or the AOPI solution was added to the 20ul of cell suspension and the sample mixed ghly. 20 ul of the 1:1 on was measured and transferred it into one side of the ng chamber. NOTE: Touching the clear area of the slide was avoided. As needed, the s were repeated on the other side of the slide. The chamber was inserted into the slot on the front of the Cellometer. For the AOPI cell counting, “Preview F1” was selected on the main screen to preview the green fluorescent image (live cell) image. For Trypan blue counting, “Preview Brightfield” was selected. The focusing wheel was used to bring image into optimal focus. Cells that had a bright center and a clearly—defined edge. “Count” was selected to begin the counting process. Results were displayed in a counting results pop-up box on the computer screen that showed the results of the counting process.

EXAMPLE 3: CELLOMETER IC2 IMAGE CYTOMETER AUTOMATIC CELL COUNTER This Example bes the procedure for operation of the Cellometer K2 Image Cytometer automatic cell counter. 1. Definitions ul iter AOPI Acridine Orange Propidium Iodine BSC ical Safety Cabinet DPBS Dulbecco's Phosphate Buffered Saline ml Milliliter MNC Mononuclear Blood Cells NA Not Applicable PBMC Peripheral Blood Mononuclear Cells PPE Personal Protective Equipment Pre-REP Initial TIL culture before Rapid Expansion Protocol of culture REP Rapid Expansion Protocol TIL Tumor Infiltrating Lymphocytes Procedure 7.1 Cell suspension preparation 7.1.1 Trypan Blue Preparation The final Trypan blue concentration was 0.1%. The manufacturer recommended preparing a stock solution of 0.2%. 1 When Trypan blue was used on the Cellometer K2, the stock (0.4 %) was diluted with PBS to 0.2 %. 2 The Trypan blue was filtered with a 0.2-0.4 micron filter and aliquoted in small volumes into labeled, capped tubes. 7.1.1.3 The cell suspension was mixed at 1:1 with 0.2 % trypan blue. 7.1.2 AOPI ation 7.1.2.1 When AOPI was used on the Cellometer K2, the AOPI solution was obtained. 2 The cell sample was stained at 1:1 with AOPI solution.

NOTE: When high concentration cultures were counted, the cell samples were diluted in cell culture medium prior to the final 1:1 dilution with Trypan Blue or AOPI.

The manufacturer's suggested range of counting was used to determine the best dilution to use. 7.2 Cellometer K2 Set-Up 7.2.1 The Cellometer K2 equipment was turned on. 7.2.2 The Cellometer Image Cytometer icon was selected on the associated computer monitor. 7.2.3 On the main screen of the software, one of the Assays listed in the dropdown box was selected. 7.2.3.1 When the appropriate Assay was selected, the Cell Type and Image Mode self-populated. 7.2.3.2 Under “Sample” section, Set User/Sample ID was selected to open r screen to input operator's information for specimen. 2.1 The “User ID” was entered. 7.2.3.2.2 The “Sample ID” was entered. The sample ID was derived from incoming specimen information. 7.2.3.3 Dilution parameters were set up. 7.2.3.3.1 When no other dilution was made besides the 1:1 mixture, the dilution factor was 2. 7.2.3.3.2 When a dilution was made prior to the final 1:1 mixture, the dilution factor was 2 times of the prior dilution. 7.2.3.3.3 The dilution factor was updated according to the mixture used in the on section of the screen. The pencil icon was selected to bring up the dialog screens. 7.2.3.3.4 The F1 Image and F2 Image sections were verified to be identical to each other. 3.5 The “Save” button was ed after set up was completed. 7.3 Cell Counting 7.3.1 The plastic backing from both sides of a Cellometer counting chamber slide (SD100) was removed and placed on top of a clean, lint-free wipe. 7.3.2 After the cell sion was prepared, a small t of the sample was removed and transferred into a well of a multiwell cell culture plate or tube. 7.3.3 When the sample was d, the dilution was med using cell culture medium. 7.3.4 20 ul of cell suspension was added into a well of the multiwell cell culture plate or tube. 7.3.5 20 ul of 0.2% trypan blue or the AOPI solution was added to the 20 pl of cell suspension and mix sample thoroughly. 7.3.6 20 ul of the 1:1 solution was measured and erred it into one side of the counting chamber.

NOTE: ng the clear area of the slide was avoided. 7.3.7 When necessary, the sample was repeated on the other side of the slide. 7.3 .8. The chamber was inserted into the slot on the front of the Cellometer. 7.3.8 For the AOPI cell ng, “Preview F1” was selected on the main screen to preview the green fluorescent image (live cell) image. For Trypan blue counting, “Preview Brightfield” was selected. 7.3.9 The focusing wheel was used to bring image into optimal focus. Cells had a bright center and a clearly-defined edge. 7.3.10 “Count” was selected to begin the counting process. 7311 Results were yed in a counting results pop—up box on the computer screen that showed the results of the counting process.

EXAMPLE 4: PREPARATION OF IL-2 STOCK SOLUTION (CELLGENIX) This example bes an exemplary preparation procedure for an IL-2 stock solution.

Definitions/Abbreviations uL: microliter or ul BSC: Biological Safety Cabinet BSLZ: Biosafety Level 2 D-PBS: Dulbecco's Phosphate Buffered Saline G: Gauge GMP: Good Manufacturing sing HAc: Acetic Acid HSA: Human Serum Albumin mL: Milliliter NA: Not applicable PPE: Personal Protective Equipment ; IL-Z: Recombinant human Interleukin-2 COA: Certificate of Analysis 6. Procedure WO 81473 6.1 Prepared 0.2% Acetic Acid solution (HAc). 6.1.1 Transferred 29 mL sterile water to a 50 mL conical tube. 6.1.2 Added 1 mL 1 N acetic acid to the 50 mL conical tube. 6.1.3 Mixed well by inverting tube 2-3 times. 6.1.4 Sterilized the HAc solution by filtration using a Steriflip filter. 6.1.5 Capped, dated and d the solution “Sterile 0.2% Acetic Acid Solution.” 6.1.6 on expired after 2 months. Stored at room temperature. 6.2 ed 1% HSA in PBS. 6.2.1 Added 4mL of 25% HSA stock solution to 96mL PBS in a 150mL sterile filter unit. 6.2.2 Filtered solution. 6.2.3 Capped, dated and labeled the solution “1% HSA in PB S.” 6.2.4 Solution expired after 2 months. Stored 4°C. 6.3 For each vial of rhIL-2 prepared, document. 6.4 Prepared rhIL-2 stock solution (6x106 IU/mL final concentration) 6.4.1 Each lot of rh1L-2 was different and required information found in the manufacturer's Certificate of Analysis (COA), such as: 6.4.1.1 Mass of rh1L-2 per vial (mg) 2 Specific activity of rh1L-2 (IU/mg) 6.4.1.3 Recommended 0.2% HAc reconstitution volume (mL) 6.4.2 Calculated the volume of 1% HSA required for rhlL—2 lot by using the equation below: Vial Muss: {mg} 21 Binéogicaé 333331333; {4%} :94 -— Hm mi {33333 x 1% as3-1 vol {mi} WWW... 8x335 4.: 6.42.] For example, according to CellGenix's rhIL-2 lot 10200121 COA, the specific activity for the 1 mg vial was 25x106 lU/mg. It recommends reconstituting the rh1L-2 in 2mL 0.2% HAc. a EgrififimH“: . Ems; .. : ,m 233-33.. mm. 2.1.6’F-m3i3‘f'fifi 6x305: 3+3 . $733: 6.4.3 Wiped rubber stopper of IL-2 vial with alcohol wipe. 6.4.4 Using a 16G needle attached to a 3mL syringe, the recommended volume of 0.2% HAc was injected into the vial. Care was taken to not dislodge the stopper as the needle was withdrawn. 6.4.5 Inverted vial 3 times and swirled until all powder was dissolved. 6.4.6 The stopper was carefully removed and set aside on an alcohol wipe. 6.4.7 Added the calculated volume of 1% HSA to the vial. 6.4.8 Capped the vial with the rubber stopper. 6.5 Storage of rhIL-2 solution 6.5.1 For short-term e (<72hrs), vials were stored at 4°C. 6.5.2 For long-term storage (>72hrs), the vial was aliquoted into smaller volumes and stored in cryovials at -20°C until ready to use. /thaw cycles were d, Expired 6 months after date of preparation. 6.5.3 Rh-IL-2 labels included vendor and catalog number, lot number, expiration date, operator initials, concentration and volume of t.

EXAMPLE 5: PREPARATION OF MEDIA FOR P AND REP PROCESSES This Example describes the procedure for the preparation of tissue culture media for use in protocols involving the culture of tumor infiltrating lymphocytes (TIL) derived from various tumor types including, but not limited to, metastatic melanoma, head and neck squamous cell carcinoma, n carcinoma, triple-negative breast carcinoma, and lung adenocarcinoma. In many cases, this media was used for preparation of any of the TILs described in the present application and Examples.

Hg microgram um micrometer uM micromolar AIM-V® free tissue culture medium (Thermo Fisher Scientific) BSC Biological Safety t CM1 Complete Medium #1 CM2 Complete Medium #2 CM3 Complete Medium #3 CM4 Complete Medium #4 WO 81473 1U or U International units ml milliliter mM millimolar NA not applicable PPE personal protective equipment Pre-REP pre-Rapid Expansion Process REP Rapid Expansion Process rh1L-2, IL-2 inant human Interleukin-2 RPM11640 Roswell Park Memorial Institute medium, formulation 1640 SOP Standard Operating ure TIL tumor infiltrating lymphocytes Procedure 7.1 All procedures were done using sterile technique in a BSC (Class II, Type 7.1.1 Surface of hood was sprayed with 70% ethanol prior to its use. 7.1.2 All items and reagents were sprayed with 70% ethanol prior to placing them into tissue culture hood. 7.2 Aliquotting of 200mM L-glutamine 7.2.1 L-glutamine was supplied in larger volumes than needed for the preparation of serum (e. g., 100ml or 500ml volumes). 7.2.2 Thawed bottle of L-glutamine in 37°C water bath. 7.2.3 Mixed L-glutamine well after thawing, as it precipitates after thaw.

Ensure that all precipitates have ed to solution prior to aliquotting. 7.2.4 Placed 5-10ml aliquots of L-glutamine into sterile 15ml conical tubes. 7.2.5 Labeled tubes with tration, , lot number, date aliquotted, and expiration date. 7.2.6 Tubes were stored at —20°C and pulled as needed for media preparation. 7.3 Preparation of CMl 7.3.1 Removed the following reagents from cold storage and warmed them in a 37°C water bathe: 7.3.1.1 RPM11640 7.3.1.2 Human AB serum 7.3.1.3 200mM L-glutamine 7.3.2 Removed the BME from 4°C storage and place in tissue culture hood. 7.3.3 Placed the gentamycin stock solution from room temperature storage into tissue culture hood. 7.3.4 Prepared CMl medium according to Table 1 below by adding each of the ingredients into the top section of a 0.2pm filter unit appropriate to the volume that was filtered.

Table 11. Preparation of CMl Ingredient Final concentration Final Volume 500 ml Final Volume IL RPM11640 NA 450 ml 900 m1 Human AB serum, 50ml 100 ml heat-inactivated 10% 200mM L-glutamine 2mM 5 ml 10 ml 55mM BME SSuM 0.5 ml lml 50mg/ml gentamicin SOug/ml 0.5 ml 1 ml sulfate 7.3.5 Labeled the CMI media bottle with its name, the initials of the preparer, the date it was d/prepared, the two week tion date and stored at 4°C until needed for tissue culture. Media was aliquotted into smalled volume bottles as required. 7.3.6 Any remaining RPM11640, Human AB serum, or L-glutamine was stored at 4°C until next preparation of media. 7.3.7 Stock bottle of BME was ed to 4°C storage. 7.3.8 Stock bottle of gentamicin was returned to its proper RT storage location. 7.3.9 Because of the limited buffering capacity of the medium, CMl was discarded no more than two weeks after preparation, or as the phenol red pH indicator showed an extreme shift in pH (bright red to pink coloration). 7.3.10 On the day of use, the ed amount of CMl was warmed in a 37°C water bath and 6000 IU/ml IL-2 was added. 7.3.11 Additional supplementation - as was needed .1 CMl was supplemented with GlutaMAX® 7.3.11.1.1 CMl was prepared by substituting 2mM GlutaMAXTM for 2mM glutamine (final concentration, see Table 2.) When this was done, the media bottle was labeled adding “2mM GlutaMAX” to prevent ion with the standard ation of CM1. 7.3.11.2 CMl was supplemented with extra antibiotic/antimycotic .2.1 Some CMl formulations required additional antibiotic or antimycotic to prevent contamination of pre-REP TIL grown from certain tumor types. 7.3.11.2.2 Antibiotic/antimycotic was added to the final concentrations shown in Table 2 below. 7.3.11.2.3 When done, the media bottle was labeled by adding the name/s of the additional antibiotic/antimycotic to prevent ion with the standard formulation of CM1.

Table 12. Additional supplementation of CM1, as was needed. ment Stock concentration Final concentration GlutaMAXTm 200mM 1. 100 _ Penicillin/streptomycin 10,000 U/ml : 100 U/ml llin penicillin 100 ug/ml ,000ug/ml streptomycin streptomycin Amphotericin B ml 1:100 2.5ug/ml 8.1 Preparation of CM2 8.1.1 d ed CM1 from refrigerator or prepare fresh CM1 as per Example above. 8.1.2 Removed AIM-V® from refrigerator. 8.1.3 Prepared the amount of CM2 needed by mixing prepared CM1 with an equal volume of AIM—V® in a sterile media bottle. 8.1.4 Added 3000 IU/ml IL—2 to CM2 medium on the day of usage. 8.1.5 Made sufficient amount of CM2 with 3000 IU/ml IL-2 on the day of usage. 8.1.6 Labeled the CM2 media bottle with its name, the initials of the preparer, the date it was filtered/prepared, the two week expiration date and stored at 4°C until needed for tissue culture. Media was aliquotted into smalled volume bottles as required. 8.1.7 Returned any CM2 without IL—2 to the refrigerator where it was stored for up to two weeks, or until phenol red pH indicator showed an extreme shift in pH (bright red to pink coloration). 8.2 Preparation of CM3 8.2.1 Prepared CM3 on the day it was required for use. 8.2.2 CM3 was the same as AIM-V® , supplemented with 3000 IU/ml 1L-2 on the day of use. 8.2.3 Prepared an amount of CM3 sufficient to experimental needs by adding IL-2 stock solution directly to the bottle or bag of AIM-V.

Mixed well by gentle shaking. Labeled bottle with “3000 IU/ml IL—2” immediately after adding to the AIM-V. When there was excess CM3, it was stored in bottles at 4°C d with the media name, the initials of the preparer, the date the media was prepared, and its expiration date (7 days after preparation). 8.2.4 Discarded media supplemented with IL-2 after 7 days storage at 4°C. 8.3 Preparation of CM4 8.3.1 CM4 was the same as CM3, with the additional supplement of 2mM GlutaMAXTM (final concentration). 8.3.1.1 For every 1L of CM3, added 10ml of 200mM GlutaMAXTM. 8.3.2 Prepared an amount of CM4 sufficient to experimental needs by adding IL—2 stock solution and GlutaMAXTM stock on directly to the bottle or bag of AIM-V. Mixed well by gentle shaking. 8.3.3 Labeled bottle with “3000 IL/nil IL—2 and GlutaMAX” immediately after adding to the AIM-V. 8.3.4 If there was excess CM4, it was stored in bottles at 4°C labeled with the media name, “GlutaMAX”, the initials of the preparer, the date the media was ed, and its expiration date (7 days after preparation). 8.3.5 Discarded media supplemented with IL—2 after 7 days storage at 4°C.

EXAMPLE 6: EVALUATION OF IRRADIATED NEIC FEEDER CELLS FOR RAPID ION PROTOCOL OF LN-144 This Example describes a novel abbreviated procedure for ying individual lots of gamma—irradiated peripheral mononuclear cells (PBMCs, also known as MNC) for use as allogeneic feeder cells in the exemplary methods described herein.

Each irradiated MNC feeder lot was prepared from an individual donor. Each lot or donor was screened individually for its ability to expand TIL in the REP in the presence of purified anti-CD3 (clone OKT3) antibody and interleukin-2 (IL-2). In addition, each lot of feeder cells was tested without the addition of TIL to verify that the received dose of gamma radiation was sufficient to render them replication incompetent. tions AOPI - Acridine Orange/ Propidum Iodide BSC - Biological Safety t CD3 - Cluster of Differentiation 3, surface marker protein for T-lymphocytes CF - fugal Force CM1 - Complete Medium for T1L, #1 CM2 - Complete Medium for TIL, # CMO - Contract Manufacturing Organization C02 — Carbon Dioxide EtOH - Ethyl Alcohol GMP — Good Manufacturing Practices Gy - Gray IL-2 — Interleukin 2 IU - International Units LN2— Liquid Nitrogen Mini-REP - apid Expansion Protocol ml - Milliliter MNC - Mononuclear Cells NA — Not Applicable OKT3 - MACS GMP CD3 pure (clone OKT3) dy PPE — Personal Protective Equipment Pre-REP - Before Rapid Expansion ol QS — Quantum Satis; fill to this quantity REP - Rapid ion Protocol TIL - Tumor Infiltrating Lymphocytes T25 - 25cm2 tissue culture flask ug - Micrograms pl - Microliter Equipment, Software, Materials Equipment BSC (Biological Safety Cabinet) Liquid Nitrogen Freezer Temperature—controlled water bath Centrifuge with swinging bucket rotor fied tissue culture incubator Pipet Aid 2—20ul Pipettor —20011] Pipettor lOO—lOOOul Pipettor Automated Cell Counter Material 15ml conical centrifuge tubes, e 50ml conical centrifuge tubes, sterile AIM V Medium CTS (Therapeutic Grade) Cell Counter Staining Solution 0 IL—2 0 MACS GMP CD3 pure (clone OKT3) antibody 0 Sterile, disposable serological pipets o Sterile, disposable transfer pipets o Sterile, pipet tips 0 24-well tissue culture plate 0 T25 flasks (Greiner #690175) 0 5.3.14. Zipper storage bags PROCEDURE Background Gamma-irradiated, growth-arrested MNC feeder cells were required for REP (Step D) of TIL expansion. Membrane receptors on the feeder MNCs bind to anti-CD3 (clone OKT3) antibody and crosslink to TIL in the REP (Step D) flask, stimulating the TIL to expand. Feeder lots were prepared from the leukapheresis of whole blood taken from individual donors. The leukapheresis t was ted to centrifugation over Ficoll- Hypaque, washed, irradiated, and cryopreserved under GMP conditions.

It was important that patients who received TIL therapy not be infused with viable feeder cells as this can result in Graft-Versus-Host e . Feeder cells were therefore growth—arrested by dosing the cells with gamma—irradiation, which ed in double strand DNA breaks and the loss of cell viability of the MNC cells upon reculture.

Evaluation Criteria and Experimental Set-Up Feeder lots were evaluated on two criteria: 1) their ability to expand TIL in coculture >100-fold and 2) their replication incompetency.

Feeder lots were tested in mini-REP format utilizing two primary pre-REP TIL lines grown in t T25 tissue culture flasks. Feeder lots were tested against two distinct TIL lines, as each TIL line was unique in its ability to proliferate in response to activation in a REP. As a control, a lot of irradiated MNC feeder cells which was historically been shown to meet the criteria of 1) and 2): (1) their ability to expand TIL in co-culture >100-fold and (2) their replication incompetency was run alongside the test lots.

] To ensure that all lots tested in a single experiment receive equivalent g, sufficient stocks of the same pre—REP TIL lines were used to test all conditions and all feeder lots. For each lot of feeder cells , there was a total of six T25 flasks: o Pre-REP TIL line #1 (2 flasks) o Pre-REP Tll line #2 (2 flasks) o Feeder control (2 flasks) 0 NOTE: Flasks containing TIL lines #1 and #2 evaluated the ability of the feeder lot to expand TIL. The feeder control flasks evaluated the replication incompetence of the feeder lot. mental Protocol Day -2/3, Thaw of TIL lines Prepared CM2 medium as per Example 5, Pre-REP and REP Media Preparation.

Warmed CM2 in 37°C water bath. Prepared 40 ml of CM2 supplemented with 3000IU/ml IL- 2. Kept warm until use. Placed 20ml of rmed CM2 t lL-2 into each of two 50ml conical tubes labeled with names of the TIL lines used. Removed the two designated pre-REP TIL lines from LN2 storage and transfer the vials to the tissue culture room. Recorded TIL line identification form. Thawed vials by placing them inside a sealed zipper storage bag in a 37°C water bath until a small amount of ice remains. d or wiped thawed vials with 70% ethanol and transferred vials to BSC. Used a sterile transfer pipet to immediately transfer the contents of vial into the 20ml of CM2 in the prepared, labeled 50ml conical tube.

QS (filled to this quantity) to 40ml using CM2 without IL-2 to wash cells. Centrifuged at 400 x CF for 5 minutes. Aspirated the supernatant and resuspended in 5ml warm CM2 supplemented with 3000 IU/ml IL-2. Removed small aliquot (20 ul) in duplicate for cell counting using an automated cell counter. Recorded the counts. While ng, placed the 50ml conical tube with TIL cells into a humidified 370C, 5% C02 incubator, with the cap loosened to allow for gas exchange. Determined cell concentration and dilute TIL to 1 x 106 cells/ml in CM2 supplemented with IL-2 at 3000 IU/ml. Cultured in 2ml/well of a l tissue culture plate in as many wells as needed in a humidified 370C incubator until Day 0 of the mini-REP. ed the ent TIL lines in separate 24-well tissue culture plates to avoid confusion and ial cross-contamination.

Day 0, initiate Mini-REP Prepared enough CM2 medium for the number of feeder lots to be tested. (e.g, for testing 4 feeder lots at one time, prepare 800ml of CM2 medium). Aliquoted a portion of the CM2 prepared in Example 5 and supplemented it with 3000 IU/ml IL-2 for the ing of the cells. (e.g., for testing 4 feeder lots at one time, prepare 500ml of CM2 medium with 3000 IU/ml IL-2). The remainder of the CM2 with no IL-2 was used for washing of cells as described below. ed TIL 4.Working with each TIL line separately to prevent cross-contamination, the 24- well plate with TIL culture was removed from the incubator and erred to the B SC. 7.3.2.5. Using a sterile transfer pipet or 00u1 or and tip, removed about 1ml of medium from each well of TIL to be used and placed in an unused well of the 24-well tissue culture plate. This was used for washing wells. 7.3.2.6. Using a fresh sterile transfer pipet or 100-1000ul Pipettor and tip, mixed ing medium with TIL in wells to end the cells and then transferred the cell suspension to a 50ml conical tube labeled with the TIL name and recorded the volume. 7.3.2.7. Washed the wells with the reserved media and transferred that volume to the same 50ml l tube. 7.3.2.8. Spun the cells at 400 x CF to collect the cell . 7.3.2.9. Aspirated off the media atant and resuspended the cell pellet in 2-5ml of CM2 medium containing 3000 IU/ml IL-2, volume used was based on the number of wells harvested and the size of the pellet — volume was sufficient to ensure a concentration of >1 .3 x 106 cells/ml. 7.3.2.10. Using a serological pipet, mixed the cell suspension thoroughly and recorded the volume. 7.3.2.11. Removed 200 pl for a cell count using an automated cell counter. 7.3.2.12. While counting, the 50ml conical tube with TIL cells was placed into a humidified, 5% C02, 37°C incubator, with the cap loosened to allow gas exchange. 7.3.2.13. Recorded the counts. 7.3.2.14. Removed the 50ml conical tube containing the TIL cells from the incubator and resuspended them cells at a concentration of 1.3 x106 cells/ml in warm CM2 supplemented with 30001U/ml IL-2. Returned the 50ml conical tube to the incubator with a loosened cap. 7.3.2.15 When needed, the original 24—well plate was kept to reculture any residual TIL. 7.3.2.16. Repeated steps 7.3.2.4 - 7.3.2.15 for the second TIL line. 7.3.2.17. Just prior to plating the TIL into the T25 flasks for the experiment, TIL were diluted 1:10 for a final concentration of 1.3 x 105 cells/ml as per step 7.3.2.35 below.

Prepare MACS GMP CD3 pure {OKT3 2 working solution 7.3.2.18. Took out stock solution of OKT3 (1mg/ml) from 4°C erator and placed in 7.3.2.19. A final concentration of 30ng/ml OKT3 was used in the media of the mini-REP. 7.3.2.20. 600ng of OKT3 were needed for 20ml in each T25 flask of the experiment; this is the equivalent of 60111 of a 10pg/ml on for each 20ml, or 360pl for all 6 flasks tested for each feeder lot. 7.3.2.21. For each feeder lot tested, 400ul of a 1:100 dilution of 1mg/ml OKT3 was made for a working concentration of 10ug/ml (e.g., for testing 4 feeder lots at one time, made 1600ul ofa 1:100 dilution of 1mg/ml OKT3: l6ul of 1mg/ml OKT3 + 1.584ml of CM2 medium with 3000IU/ml IL-2.) Prepare T25 flasks 7.3.2.22. Labeled each flask with the name of the TIL line tested, flask replicate number, feeder lot number, date, and initials of analyst. 23. Filled flask with the CM2 medium prior to preparing the feeder cells. 7.3.2.24. Placed flasks into 37°C humidified 5% CO2 incubator to keep media warm while waiting to add the remaining components. 7.3.2.25. Once feeder cells were prepared, the components were added to the CM2 in each flask as shown in Table 14, Flask Set-up, below.

CM2 + 3000 IU/ml IL-2 VINC: 1.3 X 107/1111 in CM2 + 3000IU IL-Z (final concentration 1.3 X 107/flask OKT3: lOug/ml in CM2 + 3000IU IL-Z TIL: 1.3 X lOS/ml in CM2 with 30001U of IL-2 (final concentration 1 _3 X l k) ed Feeder Cells 7.3.2.26. A minimum of 78 X 106 feeder cells were needed per lot tested for this protocol.

Each lml vial frozen by SDBB had 100 X 106 viable cells upon freezing.

Assuming a 50% recovery upon thaw from LN2 storage, it was recommended to thaw at least two lml vials of feeder cells per lot giving an estimated 100 X 106 viable cells for each REP. Alternately, if supplied in 1.8ml vials, only one vial would provide enough feeder cells 7.3.2.27. Before thawing feeder cells, pre-warmed approximately 50ml of CM2 without 1L-2 for each feeder lot to be tested. 7.3.2.28. Removed the designated feeder lot vials from LN2 storage, placed in zipper storage bag, and place on ice. Transferred vials to tissue culture room. 7.3.2.29. Thawed vials inside closed zipper e bag by immersing in a 37°C water bath. 7.3.2.30. Removed vials from zipper bag, spray or wipe with 70% EtOH and transferred vials to BSC. 7.3.2.31. Using a transfer pipet, the ts of feeder vials were immediately transferred into 30ml of warm CM2 in a 50ml conical tube. Washed vial with a small volume of CM2 to remove any residual cells in the vial. 7.3.2.32. Centrifuged at 400 X CF for 5 minutes. 33. Aspirated the supernatant and resuspended in 4ml warm CM2 plus 3000 IU/ml 1L-2. 7.3.2.34. Removed 200 pl for cell ng using the Automated Cell Counter. Record the counts. 7.3.2.35. Resuspended cells at 1.3 X 107cells/ml in warm CM2 plus 3000 IU/ml lL-2.

Setup Co-Culture 7.3.2.36. Diluted TIL cells from 1.3 X 106 ml to 1.3 X 105 cells/ml. Worked with each TIL line independently to prevent cross-contamination. 732.36.]. Added 45ml of CM2 medium to a 15ml conical tube. 7.3.2.36.2. Removed TIL cells from incubator and ended well using a 10ml serological pipet. 7.3.2.363. Removed 0.5ml of cells from the 1.3 X 106 cells/ml TIL suspension and add to the 4.5ml of medium in the 15ml conical tube. Returned TIL stock vial to incubator. 7.3.2.364. Mixed well. 7.3.2.365. Repeated steps 7.3.2.361— 7.3.2.364 for the second TIL line. 7.3 2.36.6. When testing more than one feeder lot at one time, diluted the TIL to the lower concentration for each feeder lot just prior to plating the TIL. 7.3.2.37. erred flasks with rmed media for a single feeder lot from the incubator to the BSC. 7.3.2.38. Mixed feeder cells by pipetting up and down several times with a 1ml pipet tip and transfer 1 ml (1.3 X 107 cells) to each flask for that feeder lot. 7.3.2.39. Added 60ul of OKT3 working stock (10ug/ml) to each flask. 7.3.2.40. Returned the two control flasks to the incubator. 7.3.2.41. Transferred 1 ml (1.3 X 105) of each TIL lot to the correspondingly d T25 flask. 7.3.2.42. Returned flasks to the incubator and incubated upright. Did not disturb until Day 7.3.2.43. Repeated 7.3.2.36 — 7.3.2.42 for all feeder lots . 7.3.3. Day 5: Media changed 7.3.3.1. Prepared CM2 with 3000 IU/ml IL-2. 10ml is needed for each flask 7.3.3.2. To prevent cross—contamination, handled the flasks for a single feeder lot at a time. Removed flasks from the incubator and transferred to the BSC, and care was taken not to disturb the cell layer on the bottom of the flask. 7.3.3.3. Gently removed 10ml of the media from flask and discarded. 7.3.3.4. ed for all flasks including control flask. 7.3.3.5. With a 10ml pipette, transferred 10ml warm CM2 with 3000 IU/ml IL-2 to each flask. 7.3.3.6. ed flasks to the incubator and incubate upright until Day 7. 7.3.3.7.

Repeat 7.3.3.1 - 7.3.3.6 for all feeder lots tested. 7.3.4. Day 7: t 7.3.4.1. To prevent cross-contamination, handled the flasks for a single feeder lot at a t1me. 7.3.4.2. Removed flasks from the incubator and transferred to the BSC, and care was taken not to disturb the cell layer on the bottom of the flask. 7.3.4.3. Without disturbing the cells growing on the bottom of the flasks, removed 10ml of medium from each test flask and 15ml of medium from each of the control flasks. 7.3.4.4. Using a 10ml serological pipet, resuspended the cells in the remaining medium and mixed well to break up any clumps of cells. 7.3.4.5. ed the volumes for each flask in Day 7. 7.3.4.6. After thoroughly mixing cell suspension by ing, removed 200 pl for cell counting. 7.3.4.7. Counted the TIL using the appropriate standard operating procedure in conjunction with the automatic cell counter equipment. 8. Recorded counts for Day 7. 7.3.4.9. Repeated 7.3.4.1 — 7.3.4.8 for all feeder lots . 7.3.4.10. Feeder control flasks were evaluated for replication incompetence and flasks containing TIL were evaluated for fold expansion from Day 0 according to the criteria listed in Figure 2. 7.3.5. Day 7 : Continuation of Feeder Control Flasks to Day 14 1. After completing the Day 7 counts of the feeder control flasks, added 15ml of fresh CM2 medium containing 3000 IU/ml IL-2 to each of the control flasks. 7.3.5.2. Returned the control flasks to the incubator and incubated in an upright position until Day 14. 7.3.6. Day 14 Extended Non-proliferation of Feeder Control Flasks 7.3.6.1 To prevent cross-contamination, handled the flasks for a single feeder lot at a time. 73.6.2 d flasks from the incubator and transferred to the BSC, and care was taken not to b the cell layer on the bottom of the flask. 7.3.6.3. Without disturbing the cells g on the bottom of the flasks, removed approximately 17ml of medium from each control flasks. 7.3.6.4. Using a 5ml serological pipet, resuspended the cells in the remaining medium and mixed well to break up any clumps of cells. 7.3.6.5. Recorded the volumes for each flask. 7.3.6.6. After thoroughly mixing cell suspension by pipetting, removed 200ul for cell counting. 7.3.6.7. Counted the TIL using the appropriate standard operating procedure in conjunction with the automatic cell counter equipment 7.3.6.8. Recorded counts for Day 14. 7.3.6.9. ed 7.3.4.1 — 7.3.4.8 for all feeder lots tested.

Expected Results and Acceptance Criteria Expected Results The dose of gamma irradiation was sufficient to render the feeder cells replication incompetent. All lots were expected to meet the evaluation ia and also demonstrated a ion in the total viable number of feeder cells remaining on Day 7 of the REP e compared to Day 0.

All feeder lots were expected to meet the evaluation criteria of lOO-fold expansion of TIL growth by Day 7 of the REP culture.

Day 14 counts of Feeder Control flasks were ed to continue the non— proliferative trend seen on Day 7.

Acceptance criteria ] The ing acceptance criteria had to be met for each replicate TIL line tested for each lot of feeder cells.

Acceptance was two-fold: as follows [outlined in Figure 2: Acceptance Criteria): Whether the dose of radiation was sufficient to render the MNC feeder cells replication incompetent when cultured in the presence of 30ng/ml OKT3 antibody and 3000 IU/ml [L-Z was evaluated, Replication incompetence was ted by total viable cell count (TVC) as determined by automated cell counting on Day 7 and Day 14 of the REP.

Acceptance ia is “No Growth,” meaning the total viable cell number had not increased on Day 7 and Day 14 from the initial viable cell number put into culture on Day 0 of the REP.

Evaluate the ability of the feeder cells to support TIL ion.

TIL growth was measured in terms of fold expansion of viable cells from the onset of culture on Day 0 of the REP to Day 7 of the REP.

On Day 7, TIL cultures achieved a minimum of lOO-fold expansion, (i.e., greater than 100 times the number of total viable TIL cells put into culture on REP Day 0), as evaluated by automated cell counting.

MNC feeder lots that did not meet these two criteria above were lly excluded.

Any MNC feeder lots that meet ance criteria but are judged to have poor performance in regard to the ability to expand TIL ve to other previous feeder lots tested in parallel with the same pre-REP TIL lines, as judged by those of skill in the art could have been excluded. See Table 15 below for acceptance criteria used.

Table 14 ce ntance Criteria 0 growth observed at 7 and 14 days At least a lOO-fold expansion of each TIL TIL eXpanswn. (minimum of 1.3 x 107 viable cells) Whether the dose of radiation was sufficient to render the MNC feeder cells ation incompetent when cultured in the presence of l OKT3 antibody and 3000 IU/ml lL—2 was evaluated. .2.2.1.1 Replication incompetence was evaluated by total viable cell count (TVC) as determined by automated cell counting on Day 7 and Day 14 of the .2.2.1.2 ance criteria was “No Growth,” meaning the total viable cell number was not increased on Day 7 and Day 14 from the initial viable cell number put into culture on Day 0 of the REP. .2.2.2 The y of the feeder cells to support TIL expansion was evaluated. .2.2.2.1 TIL growth was measured in terms of fold expansion of viable cells from the onset of culture on Day 0 of the REP to Day 7 of the REP. .2.2.2.1 On Day 7, TIL cultures achieved a minimum of 100-fold expansion, (i.e., greater than 100 times the number of total viable TIL cells put into culture on REP Day 0), as evaluated by ted cell counting. .2.2.3 When a lot failed to meet the two criteria above, the lot was retested according to the contingency plan outlined in Section 10.3 below. .2.2.4 Following retesting of a failed lot, any MNC feeder lot that did not meet the two ance criteria in both the original evaluation and the contingency testing was excluded. .2.2.5 Any MNC feeder lots that met acceptance ia but were judged to have poor performance in regard to the ability to expand TIL relative to other previous feeder lots tested in el with the same pre-REP TIL lines were excluded as appropriate.

Contingency Testing ofMNC Feeder Lots that do not meet acceptance criteria .3.1 In the event that an MNC feeder lot met either of the acceptance criteria outlined in Section 10.2 above, the following steps were taken to retest the lot to rule out simple experimenter error as its cause. .3.2 If there were two or more remaining satellite g vials of the lot, then the lot could be retested. If there were one or no ing ite testing vials of the lot, then the lot was failed ing to the acceptance criteria listed in Section 10.2 above. .3.3 Two trained personnel, include the original person who evaluated the lot in question, had to both test the lot at the same time. .3.4 Repeating Section 7.2 — 7.3 was done to re-evaluate the lot in question. .3.5 Each person would test the lot in on as well as a control lot (as defined in Section 7.2.4 above). .3.6 In order to be qualified, the lot in question and the control lot had to achieve the acceptance criteria of Section 10.2 for both of the personnel doing the contingency testing. .3.7 Upon meeting these criteria, the lot could then be released for CMO use as outlined in Section 10.2 above.

EXAMPLE 7: PROCEDURE FOR QUALIFYING INDIVIDUAL LOTS OF GAMMA- IRRADIATED PERIPHERAL BLOOD MONONUCLEAR CELLS This Example describes a novel abbreviated procedure for qualifying individual lots of gamma-irradiated peripheral blood mononuclear cells (PBMC) for use as allogeneic feeder cells in the exemplary methods described herein. This example provides a protocol for the evaluation of ated PBMC cell lots for use in the production of clinical lots of TIL. Each irradiated PBMC lot was prepared from an dual donor. Over the course of more than 100 qualification protocols, it has been shown that, in all cases, ated PBMC lots from SDBB (San Diego Blood Bank) can expand TILs old on Day 7 of a REP. This modified cation protocol is ed to apply to irradiated donor PBMC lots from SDBB which must still be tested to verify that the received dose of gamma radiation was sufficient to render them ation incompetent. Once demonstrated that they maintain replication incompetence over the course of 14 days, donor PBMC lots were considered “qualified” for usage to produce clinical lots of TIL.

Key Terms and Definitions pg — Microgram ul — Microliter AIM-V — commercially available cell culture medium Biological Safety Cabinet BSC — Cluster of Differentiation CD — te Medium for TIL #2 CMZ — CM2 supplemented with 3000 IU/ml 1L—2 CMZILZ — ct Manufacturing Organization C02 — Carbon Dioxide EtOH — Ethanol GMP — Good Manufacturing Practices Gy — Gray IL — Interleukin IU — International Units LN2 7 Liquid Nitrogen MI — Milliliter NA — Not Applicable OKT3 — anti-CD3 monoclonal antibody designation P20 — 2-20pl pipettor P200 — 20—20mm pipettor PBMC — peripheral blood mononuclear cells P1000 — lOO-lOOOul pipettor PPE — Personal Protective Equipment REP 7 Rapid Expansion Protocol SDBB — San Diego Blood Bank TIL — Tumor Infiltrating Lymphocytes T25 — 25cm2 tissue culture flask x g — “times gravity” — measure of relative centrifugal force Specimens included Irradiated donor PBMC (SDBB).

Procedure Background 7.1.1 Gamma-irradiated, -arrested PBMC were required for current standard REP of TIL. Membrane receptors on the PBMCs bind to anti-CD3 (clone OKT3) antibody and crosslink to TIL in culture, stimulating the TIL to expand. PBMC lots were prepared from the leukapheresis of whole blood taken from individual donors. The leukapheresis product was subjected to centrifugation over Ficoll-Hypaque, washed, irradiated, and cryopreserved under GMP conditions.

It is important that patients who receive TIL therapy not be infused with viable PBMCs as this can result in Graft—Versus—Host Disease (GVHD). Donor PBMCs were therefore -arrested by dosing the cells with gamma- irradiation, resulting in double strand DNA breaks and the loss of cell ity of the PBMCs upon reculture.

Evaluation ia 7.2.1 Evaluation criterion for irradiated PBMC lots was their replication incompetency.

Experimental Set-up 7.3.1 Feeder lots were tested in mini—REP format as if they were to be co—cultured with TIL, using upright T25 tissue culture flasks. 7.3.1.1 Control lot: One lot of irradiated PBMCs, which had historically been shown to meet the criterion of 7.2. 1, was run ide the experimental lots as a control. 7.3 .2 For each lot of irradiated donor PBMC tested, duplicate flasks were run.

Experimental Protocol All tissue culture work in this protocol was done using sterile technique in a Day 0 7.4.1 ed ~90ml of CM2 medium for each lot of donor PBMC to be tested.

Kept CM2 warm in 37°C water bath. 7.4.2 Thawed an t of6 x 106 IU/ml IL-2. 7.4.3 Returned the CM2 medium to the BSC, wiping with 70% EtOH prior to g in hood. For each lot ofPBMC tested, about 60ml of CM2 was removed to a separate sterile bottle. Added IL—2 from the thawed 6 x 106 IU/ml stock solution to this medium for a final concentration of 3000 IU/ml.

Labeled this bottle as “CM2/ILZ” (or similar) to distinguish it from the unsupplemented CMZ. 7.4.4 Labeled two T25 flasks for each lot of PBMC to be tested. Minimal label included: 7.4.4.1 Lot number 7.4.4.2 Flask number (1 or 2) 7.4.4.3 Date of initiation of culture (Day 0) ed OKT3 7.4.5 Took out the stock solution of D3 (OKT3) from the 4°C refrigerator and placed in the BSC. 7.4.6 A final concentration of 30ng/ml OKT3 was used in the media of the mini— 7.4.7 Prepared a lOug/ml working solution of anti-CD3 (OKT3) from the lmg/ml stock solution. Placed in refrigerator until . 7.4.7.1 For each PBMC lot , prepared 150 pl of a 1:100 dilution of the anti-CD3 (OKT3) stock.

E. g., for testing 4 PBMC lots at one time, prepared 600111 of 10ug/ml anti—CD3 (OKT3) by adding 6111 of the 1mg/ml stock solution to 594 pl of CM2 supplemented with 3000 IU/ml IL-2.

Prepared Flasks 7.4.8 Added 19ml per flask of CM2/IL-2 to the labeled T25 flasks and place flasks into 37°C, fied, 5% C02 incubator while preparing cells.

Prepared Irradiated PBMC 7.4.9 Worked with each donor PBMC lot individually to avoid the potential cross- contamination of the lots. 7.4.10 Retrieved vials of PBMC lots to be tested from LN2 storage. These were placed at —80°C or kept on dry ice prior to g. 7.4.11 Placed 30ml of CMZ (without IL-Z supplement) into 50ml conical tubes for each lot to be thawed. Labeled each tube with the different lot numbers of the PBMC to be thawed. Capped tubes tightly and place in 37°C water bath prior to use. As needed, returned 50ml conical tubes to the BSC, wiping with 70% EtOH prior to placing in the hood. 7.4.12 d a vial PBMC from cold storage and place in a floating tube rack in a 37°C water bath to thaw. Allowed thaw to proceed until a small amount of ice remains in the vial. 7.4.13 Sprayed or wiped thawed vial with 70% EtOH and transfer to BSC. 7.4.14 Using a sterile transfer pipet, the contents of the vial were immediately transferred into the 30ml of CM2 in the 50ml conical tube. Removed about 1ml of medium from the tube to rinse the vial; ed rinse to the 50ml conical tube. Capped tightly and swirl gently to wash cells. 7.4.15 Centrifuged at 400 x g for 5min at room temperature. 7.4.16 Aspirated the supernatant and ended the cell pellet in 1ml of warm CM2/IL-2 using a 1000ul pipet tip. Alternatively, prior to adding medium, resuspended cell pellet by dragging capped tube along an empty tube rack.

After resuspending the cell pellet, bring volume to 4ml using CM2/IL-2 . ed volume. 7.4.17 Removed a small aliquot (e.g., 100ul) for cell counting using an automated cell counter. 7.4.17.1 Performed counts in duplicate according to the particular automated cell counter SOP. It was often necessary to perform a dilution of the PBMC prior to performing the cell counts. A recommended ng dilution was 1:10, but this could vary depending on the type of cell counter used. 7.4.17.2 Recorded the . 7418 Adjusted concentration of PBMC to 1.3 x 107 ml as per step 7.4.15.2 using CM2/lL-2 medium. Mixed well by gentle swirling or by gently aspirating up-and-down using a serological pipet.

Set Up Culture Flasks 7.4.19 Returned two labeled T25 flasks to the BSC from the tissue culture incubator. 7.4.20 Returned the lOug/ml vial of anti-CD3/OKT3 to the BSC. 7.4.21 Added 1ml of the 1.3 x 107 PBMC cell suspension to each flask. 7.4.22 Added 60ul ofthe lOug/ml anti-CD3/OKT3 to each flask. 7.4.23 Returned capped flasks to the tissue culture incubators for 14 days of growth without bance. 7.4.24 The anti-CD3/OKT3 vial was placed back into the refrigerator until needed for the next lot. 7.4.25 Repeated steps 7.4.9 — 7.4.24 for each lot of PBMC to be evaluated.

Day 14, Measurement of Non-proliferation of PBMC 7.4.26 Working with each lot independently, carefully returned the duplicate T25 flasks to the BSC. 7.4.27 For each flask, using a fresh 10ml serological pipet, d ~l7ml from each of the flasks, then carefully pulled up the ing media to measure the volume remaining in the flasks. Recorded volume. 7.4.28 Mixed sample well by pipetting up and down using the same serological pipet. 7.4.29 Removed a 200ul sample from each flask for counting. 7.4.30 Counted cells using an automated cell counter. 7.4.31 ed steps 7.4.26 — 7.4.31 for each lot of PBMC being evaluated.

RESULTS AND ACCEPTANCE CRITERION Results .1.1 The dose of gamma irradiation was sufficient to render the feeder cells replication incompetent. All lots were ed to meet the evaluation criterion and trated a reduction in the total viable number of feeder cells remaining on Day 14 of the REP culture compared to Day 0.

Acceptance Criterion .2.1 The following acceptance ion was met for each irradiated donor PBMC lot tested: .2.2 “No growth” — g that the total number of viable cells on Day 14 was less than the initial viable cell number put into culture on Day 0 of the REP. .2.3 Should a lot fail to meet the criterion above, the lot was retested per the Contingency Testing Procedure outlined in the section 10.4. .2.4 Following retesting of a failed lot, any MNC feeder lot that did not meet the acceptance ion in both the original evaluation and the gency testing was excluded. gency Testing ofPBMC lots which did not meet acceptance criterion. .4.1 In the event than an ated donor PBMC lot did not meet the acceptance criterion above, the following steps were taken to retest the lot to rule out simple experimenter error as the cause of its failure. .4.2 If there were two or more ing satellite vials of the lot, then the lot was retested. If there were one or no ing satellite vials of the lot, then the lot was failed according to the acceptance criterion of section 10.2 above. .4.3 Whenever possible, two trained personnel (preferably including the original person who evaluated the lot in question) did the testing of the two separate vials independently. This was the preferred method of contingency testing.

Aside from the separate vials of PBMC, the same reagents can be used by both personnel. .4.3.1. If two personnel were not ble, one person did the testing of the two PBMC vials for the failed lot, working with each vial independently. .4.4 Repeating of section 7.4 “Experimental Protocol” was done to re-evaluated the lot in question. .4.5 In addition to the lot in on, a control lot was tested by each person carrying out the contingency testing. .4.5.1 If two personnel perform contingency testing, both personnel tested the control lot independently. .4.5.2 If only one person was ble to perform contingency testing, it was not necessary for the control lot to be run in duplicate. .4.5.3 To be qualified, a PBMC lot going through contingency testing must have had both the control lot and both replicates of the lot in question achieve the acceptance criterion of Section 10.2 to pass. .4.5.4 Upon meeting this criterion, the lot was then be released for CMO usage as outlined in section 10.2.

E 8: COMPARISON OF PRE- AND POST-CRYOPRESERVED TILS Antibody cocktails for the samples and the FMO controls were made before starting the sample preparation and staining ure. The cocktails were stored at 4°C in the dark for up to 60 days. See Cocktail Preparation section below.

Table 15: Stainin Procedure: Removed Aqua dye aliquot from the freezerptdark.

Added 3mL lXPBS to each sample tube Spun tubes at 300g for 5 minutes. ed Aqua Live/Dead stain. Dilute 1:200 in PBS. 25 uL per sample and FMO control tube is needed. 1:200 = LAuua+ mL PBS Aspirated or decanted supernatant from step 3 Added 25uL of Aqua L/D to each sample tube. Resuspended cells by dragging along rack Incubated 15min, dark, room temperature.

Without washing, added SOpL of appropnate Ab cocktail to each tube ted tubes for 15 minutes at room temperature Added 3mLs ofFACS Wash buffer Spun at 330g for 5 min at 4°C.

Resuspended tubes by dragging along an empty tube rack.

Added 100“L 1% PFA/PBS solution at 4°C.

Stored samples at 4°C in dark for up to 72 hours.

Ran samples on Flow Cytometer Table 16: entiation Panel 1 DF1 : PE/Cy7 IP26 BioLegend 306720 Pcergl: HNK-l BioLegend 359622 PE CD282 BioLegend 302908 CD4 FITC OKT4 eBioscience 11 042 2 Beckman Coulter Table 17: Differentiation Panel 2 DF2 CD45RA* PE-Cy7 H1100 560675 CD8a PerCP/Cy5.5 RPA-T8 BioLegend 301032 150503 BD Biosciences 560765 110048- OKT4 eBioscience ATP/CW BioLegend 300318 CD3 8* 113-7 BioLegend 356606 HLA-DR L243 BioLegend 3 0763 3 >“Denotes FMO (Fluorescence Minus One) control should be made.

Table 18: T cell Activation Panel 1 Tactl CD137* PE/C7 4B4-1 309818 - PerCP/C5.5 RPA-T8 301032 - Lag3"< PE 3DS223H eBioscience 1242 CD4 FITC OKT4 BioLeend 317408 CD3 APC/C 7 HIT3a 300318 - EH122H7 329908 - BV421 F38—2E2 345008 - Table 19: T cell Activation Panel 2 (Tath) CD69* PE-C 7 FNSO Bioslzilznces CD8a C 5.5 RPA-T8 BioLe_end TIGIT* PE MBSA43 eBioscience CD4 FITC OKT4 BioLe_end CD3 APC/C 7 HIT3a BioLe_end KLRG1* Ax647 SA231A2 BioLe_end CD154* BV421 TRAP1 B' ' 563886 >“Denotes FMO (Fluorescence M1nus One) control should be made.

Compensation ls 1. Added one drop ofBD Comp beads to 11 tubes. 2. Labeled tubes 1 through 7 with the chromophores from DF1 3. Labeled tubes 8 through ten with APCy7, BV421, and AX647. 4 Tube 11 was for unlabeled beads.

. Added 5 uL of Antibody to each tube. 6. Incubated 10 to 30 minutes in dark, room ature. 7. Washed with 3mLs FACS Buffer 8. Resuspended with SOOuL 1% PFA. 9. Added one drop ofBD Comp negative bead to each tube.

. Stored at 4°C in dark. Could be used for one week.

Aqua control: 1. Added one drop of Arc positive control to tube labelled Aqua. 2. Added 3 uL of thawed aqua solution to tube. 3. Repeated steps 6 — 10 as above. Except used the negative Arc bead for step 9.

Table 20: Setup. 2 PerCP-CyS .5 ———3 U‘IUILI‘I “——kl‘lkl‘l lkl‘lU‘IUI EXAMPLE 9: REMARKABLY STABLE TUMOR-INFILTRATING LYMPHOCYTES (TIL) FOR INFUSION PHENOTYPE FOLLOWING CRYOPRESERVATION Abstract Background: This Example discusses the development of cancer immunotherapies based on tumor-infiltrating lymphocytes (TIL) with the ultimate goal of developing therapeutic populations of TILs. Cryopreservation of TILs allows the final cell product to be shipped in a safe manner with fewer temporal constraints (Axelsson S, o M, Hedman M, Ludvigsson J, Casas R: Cryopreserved peripheral blood mononuclear cells are suitable for the assessment of logical markers in type 1 diabetic en. Cryobiology 2008, 57:201—8.) Here, fresh versus frozen/thawed TIL s were evaluated for the expression of individual phenotypic markers to assess whether phenotypic changes occur with cryopreserved TILs. (See, for example, Sadeghi A, Ullenhag G, Wagenius G, T6tterman TH, Eriksson F: Rapid expansion of T cells: Effects of culture and cryopreservation and importance of short-term cell ry. Acta Oncol. 2013,52z978-86.) Results: No significant differences in CD4, CD8, NK, TCROLB expression, or memory markers comparing fresh versus thawed TIL were observed. The activation status of TIL as defined by HLA-DR, CD38, and CD69 expression was ined while regulatory molecules LAG-3 and TIM-3 demonstrated a slight decrease in expression. In addition, the viability of both the fresh and thawed product was greater than 86%.

PreREP TILs were obtained by culturing melanoma tumor fragments in IL-2 (6000 IU/ml).

Rapid Expansion ol (REP) cells were initiated using irradiated allogeneic PBMC feeder cells with OKT3 and IL-2 in a GREX-lOO flask for 11-14 days.

Cultured cells were eserved in 5% DMSO.

Flow cytometric evaluation of fresh and thawed TIL following rest for 1 to 2 hours in IL-2 was performed using four panels consisting of lineage, differentiation, activation, and regulatory markers.

Conclusion: Cryopreservation did not affect the ed phenotypic characteristics of TIL, with the exception of modest changes in some tory molecules. We are investigating the possibility of using cryopreserved TIL in a clinical setting.

EXAMPLE 10: MEMORY CELL SUBSETS IN FRESH VERSUS REREP TIL POPULATIONS In previous experiments, no central memory subset was seen with fresh TIL populations (see, Figure 8). However, after the ReREP nearly 60% central memory cells, as provided in Table 22 below.

Based on the raw numbers, the rested cells had a slightly higher CD4 population than the not . Overall the CD8 percentage was high as expected. It’s roughly a 60/40 split for CM (central memory—Q3)/EM (effector memory—Q4) among the CD8s. The 28+ expression looks interesting. The rested cells have a higher amount. See also, Figure 9 and lOA—lOB. See, also Figure 15.

EXAMPLE 11: ADMINISTRATION OF AUTOLOGOUS TUMOR RATING LYMPHOCYTES (TILS) IN MELANOMA PATIENTS Administration of autologous tumor infiltrating lymphocytes (TILS) in melanoma patients has shown an overall se of 55% at NCI, 38% at Moffitt Cancer , 48% at MD Anderson Cancer Center, and 40% in Sheba at the Ella Cancer Institute, Israel. The durable responses observed in melanoma patients using ACT may permit broader ation to other solid tumors. As shown herein, the feasibility of growing TILs and developing TIL therapies for other solid tumors is demonstrated. The example provides data showing “Successful expansion and characterization of tumor infiltrating lymphocytes (TILs) from non-melanoma tumors”, see, Figures 12-14.

Phenotypic characterization of TILs from bladder, cervical, and lung cancer were greater than 60-70% CD8+ T-cells whereas TILs from head and demonstrated variable distribution of CD8+ and CD4+ T-cells. TILs propagated from TNBC were greater than 80% CD4+ T-cells. Regardless of the tumors, most es had less than 20% CD56+ NK cells.

] TILs were prepared by: a. Washing an obtained tumor in HBSS; b. Dicing the tumor into fragments (e.g., 2-3 mm3 fragments); c. Placing the tumor fragments in G-REX 10 cell culture flasks with medium containing serum and IL-2, d. Exchanging media on day 7 and every 4-5 days from day 11 until day 21, e. Assessing cell count, viability, and phenotyping followed by eservation for future purposes including, but not limited to, future delivery to ts for the treatment of tumors, as described herein.

As demonstrated herein, TILs were grown from lung, bladder, head and neck, cervical, and TNBC t tumors.

] Moreover, as demonstrated herein, lung, bladder, and cervical tumors showed greater proportion of CD8+ TILs. Head and neck and TNBC tumors were mostly CD4+ TILs. In addition, further characterization of CD4+ and CD8+ TILs demonstrated or memory phenotypic cells that were also CD27+ and CD28+.

The examples set forth above are ed to give those of ordinary skill in the art a complete disclosure and description of how to make and use the embodiments of the compositions, systems and methods of the invention, and are not intended to limit the scope of what the inventors regard as their invention. Modifications of the above-described modes for carrying out the invention that are obvious to persons of skill in the art are intended to be within the scope of the following claims. All patents and publications mentioned in the cation are indicative of the levels of skill of those skilled in the art to which the invention ns. All references cited in this disclosure are incorporated by reference to the same extent as if each reference had been incorporated by reference in its entirety individually.

All headings and section designations are used for y and reference purposes only and are not to be considered ng in any way. For example, those of skill in the art will appreciate the usefulness of ing various aspects from different headings and sections as appropriate according to the spirit and scope of the invention described herein.

All references cited herein are hereby incorporated by reference herein in their ties and for all purposes to the same extent as if each individual publication or patent or patent application was specifically and individually indicated to be incorporated by reference in its entirety for all purposes.

Many modifications and variations of this application can be made without departing from its spirit and scope, as will be nt to those skilled in the art. The specific ments and examples described herein are offered by way of example only, and the application is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which the claims are entitled.

Claims (57)

WHAT IS CLAIMED IS:

1. A method for expanding tumor infiltrating lymphocytes (TILs) into a therapeutic population of TILs comprising: (i) performing a first ion by culturing a first population of TILs obtained from a tumor sample from a patient in a cell culture medium sing IL-2 to produce a second tion of TILs; and (ii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with onal IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third tion of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic population of TILs.

2. The method according to claim 1, n the tumor sample comprises one or more tumor fragments.

3. The method according to claim 1, wherein the tumor sample comprises a tumor .

4. The method according to claim 3, wherein the tumor digest was prepared by incubating a sample of the tumor that was resected from the subject in an enzymatic media.

5. The method according to claim 4, further comprising disrupting the tumor sample mechanically so as to dissociate the tumor sample.

6. The method according to claim 5, further comprising purifying the disassociated tumor sample using a density gradient separation.

7. The method according to any one of claims 4 to 6, wherein the enzymatic media comprises DNase.

8. The method according to any one of claims 4 to 7, n the tic media comprises 30 units/mL of DNase.

9. The method according to any one of claims 4 to 8, wherein the enzymatic media comprises collagenase.

10. The method according to any one of claims 4 to 9, wherein the enzymatic media comprises 1.0 mg/mL of collagenase.

11. The method according to any one of claims 1 to 10, wherein the tumor sample comprising the first population of TILs is cryopreserved and thawed prior to step (i).

12. The method according to any one of claims 1 to 11, wherein the method r comprises: (iii) performing an additional second expansion by supplementing the cell culture medium of the third population of TILs with additional IL-2, additional OKT-3, and onal APCs, n the additional second expansion is performed for at least 14 days to obtain a larger therapeutic population of TILs than obtained in step (ii).

13. The method according to claim 12, wherein after step (ii), the cells are removed from the cell culture and cryopreserved in a storage medium prior to performing step (iii).

14. The method according to claim 12 or 13, wherein the cells are thawed prior to performing step (iii).

15. The method according to any one of claims 1 to 14, wherein step (ii) is repeated one to four times in order to obtain sufficient TILs in the therapeutic population of TILs for a eutically effective dosage of the TILs.

16. The method according to any one of claims 1 to 15, wherein the first expansion is performed from about 11 to 21 days.

17. The method according to any one of claims 1 to 15, wherein the first expansion is performed within about 11 days, 12 days, 13 days, 14 days, 15 days, 16 days, 17 days, 18 days, 19 days, 20 days or 21 days.

18. The method according to any one of claims 1 to 15, wherein the first expansion is performed within about 11 days, 12 days, 13 days or 14 days.

19. The method according to any one of claims 1 to 15, wherein the first expansion is performed for about 11 to 12 days.

20. The method according to any one of claims 1 to 19, wherein the second expansion is performed within about 14 days, 15 days, 16 days, 17 days, 18 days, 19 days, 20 days, 21 days or 22 days.

21. The method according to any one of claims 1 to 19, wherein the second ion is performed within about 14 days, 15 days, 16 days or 17 days.

22. The method according any one of claims 1 to 19, wherein the second expansion is med within about 14 days or 15 days.

23. The method ing to any one of claims 1 to 19, wherein the second expansion is performed for about 14 to 22 days.

24. The method according to any one of claims 1 to 19, wherein the second expansion is performed within about 21 days.

25. The method according to any one of claims 1 to 24, wherein steps (i) h (ii) or (iii) are performed within a period of about 40 days to about 50 days.

26. The method according to any one of claims 1 to 24, wherein steps (i) through (ii) or (iii) are performed within a period of about 42 days to about 48 days.

27. The method according to any one of claims 1 to 24, wherein steps (i) through (ii) or (iii) are performed within a period of about 42 days to about 45 days.

28. The method ing to any one of claims 1 to 24, wherein steps (i) through (ii) or (iii) are performed within about 44 days.

29. The method according to any one of claims 1 to 24, wherein steps (i) h (ii) or (iii) are performed within about 24 days.

30. The method according to any one of claims 1 to 24, wherein steps (i) through (ii) or (iii) are performed within about 26 days.

31. The method according to any one of claims 1 to 30, wherein the cells from steps (ii) or (iii) express CD4, CD8, and TCR αβ at levels similar to freshly harvested cells.

32. The method according to any one of claims 1 to 31, wherein the third population of TILs is at least 100-fold greater in number than the second population of TILs.

33. The method according to any one of claims 1 to 32, wherein the third population of TILs is a therapeutic population of TILs which comprises an increased subpopulation of effector T cells and/or l memory T cells relative to the second population of TILs.

34. The method according to claim 33, wherein the effector T cells and/or central memory T cells in the therapeutic population of TILs exhibit one or more characteristics ed from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and decreased CD56 expression, ve to or T cells and/or central memory T cells in the third population of cells.

35. The method according to any one of claims 1 to 34, wherein the antigen presenting cells are peripheral blood mononuclear cells (PBMCs).

36. The method according to claim 35, wherein the PBMCs are added to the cell e on any of days 9 through 17 in step (ii).

37. The method ing to any one of claims 1 to 34, wherein the APCs are artificial APCs (aAPCs).

38. The method according to any one of claims 1 to 37, further comprising the step of transducing the first population of TILs with an expression vector comprising a c acid encoding a high-affinity T cell receptor.

39. The method according to any one of claims 1 to 37, further comprising the step of transducing the first population of TILs with an sion vector comprising a nucleic acid encoding a chimeric antigen receptor (CAR) sing a single chain variable fragment dy fused with at least one endodomain of a T-cell signaling molecule.

40. The method according to any one of claims 1 to 39, wherein the therapeutic population of TILs are formulated for infusion into a patient.

41. The method according to any one of claims 1 to 40, where the number of TILs sufficient for a therapeutically effective dosage is from about 10 to about 13.7×1010.

42. The method according to any one of claims 1 to 41, the method further comprising: (a) performing an additional expansion of a portion of the third population of TILs by supplementing the cell culture medium of the third population with IL-2, OKT-3, and APCs for a reREP period of at least 3 days, wherein the portion of the third population of TILs is previously cryopreserved and thawed prior to the additional ion, wherein the third expansion is performed to obtain a fourth population of TILs, wherein the number of TILs in the fourth population of TILs is compared to the number of TILs in the third population of TILs to obtain a ratio; (b) determining based on the ratio in step (a) whether the thawed population of TILs is suitable for administration to a patient; and (c) formulating a therapeutically effective dosage of the thawed third population of TILs for administration to the patient when the ratio of the number of TILs in the fourth tion of TILs to the number of TILs in the third population of TILs is determined to be greater than 5:1 in step (b).

43. A therapeutic tion of tumor infiltrating lymphocytes (TILs) obtainable by the method comprising: (i) performing a first expansion by culturing a first population of TILs obtained from a tumor sample from a patient in a cell culture medium comprising IL-2 to produce a second population of TILs; (ii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third tion of TILs, and wherein the second expansion is med for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic tion of TILs; (iii) harvesting the third population of TILs obtained from step (ii); (iv) transferring the harvested third population of TILs from step (iii) into an infusion bag; (v) cryopreserving the infusion bag comprising the harvested TIL population from step (iv) using a cryopreservation process.

44. A therapeutic population of tumor infiltrating cytes (TILs) obtainable by the method according to any of claims 1 to 41.

45. Use of ed tumor infiltrating lymphocytes (TILs) in the manufacture of a medicament for the treatment of a cancer in a subject, wherein treatment comprises administration of the TILs to the subject, wherein the expanded TILs are obtained as follows : (i) ming a first expansion by culturing a first population of TILs obtained from a tumor sample from a t in a cell culture medium comprising IL-2 to produce a second population of TILs; (ii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and n presenting cells (APCs), to produce a third tion of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic population of TILs; (iii) harvesting the third population of TILs obtained from step (ii); (iv) transferring the harvested third population of TILs from step (iii) into an infusion bag; (v) cryopreserving the infusion bag comprising the harvested TIL tion from step (iv) using a cryopreservation process; and (vi) formulating for administration a therapeutically effective dosage of the third population of TILs to the subject.

46. The use according to claim 45, further comprising: (a) performing an onal expansion of a portion of the third population of TILs by supplementing the cell culture medium of the third population with IL-2, OKT-3, and APCs for a reREP period of at least 3 days, wherein the portion of the third population of TILs is previously eserved and thawed prior to the additional expansion, wherein the third ion is performed to obtain a fourth population of TILs, wherein the number of TILs in the fourth population of TILs is ed to the number of TILs in the third population of TILs to obtain a ratio; (b) determining based on the ratio in step (a) whether the thawed population of TILs is suitable for administration to a patient; and (c) formulating a therapeutically effective dosage of the thawed third population of TILs for administration to the patient when the ratio of the number of TILs in the fourth population of TILs to the number of TILs in the third population of TILs is determined to be greater than 5:1 in step (b).

47. Use of expanded tumor infiltrating lymphocytes (TILs) in the manufacture of a medicament for the treatment of cancer in a subject, wherein treatment comprises stration of the TILs to the subject, wherein the TILs are ed by the method according to any one of claims 1 to 41.

48. The use according to claim 45 or 46, wherein prior to the administration of a therapeutically effective dosage of TIL cells, a non-myeloablative lymphodepletion regimen has been administered to the subject, wherein the non-myeloablative lymphodepletion regimen comprises the steps of administration of cyclophosphamide at a dose of 60 day for two days followed by administration of abine at a dose of 25 day for five days.

49. The use according to any of claims 45 to 47, wherein the subject is further treated with a high-dose IL-2 regimen starting on the day after administration of the TIL cells to the subject, wherein optionally the ose IL-2 regimen comprises 600,000 or 720,000 IU/kg administered as a 15-minute bolus intravenous infusion every eight hours until tolerance.

50. The use ing to any of claims 45 to 48, wherein the cancer is selected from the group consisting of melanoma (including metastatic melanoma), ovarian cancer, al cancer, all-cell lung cancer (NSCLC), lung cancer, bladder cancer, breast cancer, cancer caused by human papilloma virus, head and neck cancer (including head and neck squamous cell carcinoma (HNSCC)), renal cancer, and renal cell carcinoma.

51. A method for assessing the metabolic activity of a TIL cell population obtained by the method according to any one of claims 1 to 41, comprising measuring the basal ysis of the cells, measuring the basal respiration of the cells, measuring the spare atory capacity (SRC) of the cells, and/or measuring the glycolytic reserve of the cells.

52. A method for expanding tumor infiltrating lymphocytes (TILs) into a therapeutic population of TILs ing to the gs and/or the specification.

53. A therapeutic population of tumor infiltrating lymphocytes (TILs) obtainable by the method according to the drawings and/or the specification.

54. Use of expanded tumor infiltrating lymphocytes (TILs) in the manufacture of a medicament for the treatment of cancer in a subject according to the drawings and/or the specification.

55. A cryopreserved population of tumor infiltrating lymphocytes (TILs) obtainable by the method according to the drawings and/or the specification.

56. A cryopreserved therapeutic population of tumor rating lymphocytes (TILs) obtainable by the method according to the drawings and/or the specification.

57. A method for assessing the metabolic activity of a TIL cell population according to the drawings and/or the specification. mN mN mHH i E Eaten. co=m_:E_Hmm._-Hmon H H H H m.NN wda DVD imHHmOH 3H mm: umiwmmaoru auspice. m? HNH 153 NH N.~ mm H H H md HmNN mdwm Hm.- EN 0de N unseen. Hmwimzhmon #4» 06 wam :HHHm 3 w: m§ME H H H H H 5.2”. mNH mdfi mdfim in 32 AEEVEEE EE “5 9 :38 E E m_m>_8>