CA2883949C - Tumor lysate loaded particles - Google Patents
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Abstract
Dendritic cells containing tumor lysate loaded particles are prepared. The dendritic cells present tumor antigens to elicit the Major Histocompatibility Complex class I pathway and can be used as a vaccine to treat cancer, including ocular melanoma.
Description
Tumor Lysate Loaded Particles BACKGROUND OF THE INVENTION
100021 A tumor cell exists in part because it has selected for one or more mutations that allows it to partially or completely escape immune surveillance in vivo.
100031 In an attempt to elicit an immune response to a tumor cell, previous researchers have used dendritic cells, which are professional antigen-presenting cells, to present tumor antigens to the immune system. For example, dendritic cells pulsed with peptide or tumor lysate have been used to vaccinate melanoma patients.
[0004] However, simply presenting tumor antigens to the immune system in the foregoing manner has not been effective because such antigens were merely endocytosed by the dendritic cells and generally presented through the Major Histocompatibility Complex (MHC) class II, which elicits only helper T cells and does not provide a robust immune response.
[0005] In contrast, presenting tumor antigens via the MHC class I pathway contributes to a more robust anti-tumor immunity by activating CD8+ T cells. Previous researchers have attempted to present tumor antigens through the MHC class I pathway by using gene transfer methods. However, these methods have disadvantages, including (1) a limited ability to identify all of the important tumor-specific antigens, (2) a limited ability to map the genes of specific tumor antigens, (3) only one or a small number of known tumor antigen genes can be introduced into a dendritic cell and (4) the methods are time-consuming and cumbersome.
SUMMARY OF THE INVENTION
[0006] Some embodiments relate to an isolated dendritic cell comprising a phagocytosed component consisting essentially of (i) a particle and (ii) a tumor lysate loaded within the particle. In specific embodiments, the tumor lysate is present in an amount from about 200 jig to about 500 jig. In specific embodiments, the tumor lysate is present in an amount of about 200 g.
[0007] In some embodiments, the tumor lysate is a lysate selected from a cancer selected from the group consisting of breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer and ocular melanoma.
[0008] In some embodiments, the particle is a yeast cell wall particle. In some embodiments, the dendritic cell is an immature cell that has been isolated for no more than 8 days.
[0009] Another embodiment relates to a vaccine comprising the foregoing isolated dendritic cell.
[0010] Some embodiments relate to a method for producing an isolated dendritic cell containing a tumor lysate loaded particle comprising: (i) loading the tumor lysate into the particle to produce the tumor lysate loaded particle; (ii) freeze-drying the tumor lysate loaded particle; and (iii) incubating the tumor lysate loaded particle with a dendritic cell, wherein the incubating causes the dendritic cell to phagocytose the tumor lysate loaded particle.
[0011] In specific embodiments, the foregoing method further comprises (a) resuspending the tumor lysate loaded particle in solution and (b) freeze-drying the resuspended solution before step (iii). In specific embodiments, the tumor lysate is produced by freezing and thawing the tumor. In specific embodiments, the foregoing method further comprises repeating the freezing and thawing steps. In specific embodiments, the foregoing method further comprises cryopreserving the tumor lysate at -150 C.
100021 A tumor cell exists in part because it has selected for one or more mutations that allows it to partially or completely escape immune surveillance in vivo.
100031 In an attempt to elicit an immune response to a tumor cell, previous researchers have used dendritic cells, which are professional antigen-presenting cells, to present tumor antigens to the immune system. For example, dendritic cells pulsed with peptide or tumor lysate have been used to vaccinate melanoma patients.
[0004] However, simply presenting tumor antigens to the immune system in the foregoing manner has not been effective because such antigens were merely endocytosed by the dendritic cells and generally presented through the Major Histocompatibility Complex (MHC) class II, which elicits only helper T cells and does not provide a robust immune response.
[0005] In contrast, presenting tumor antigens via the MHC class I pathway contributes to a more robust anti-tumor immunity by activating CD8+ T cells. Previous researchers have attempted to present tumor antigens through the MHC class I pathway by using gene transfer methods. However, these methods have disadvantages, including (1) a limited ability to identify all of the important tumor-specific antigens, (2) a limited ability to map the genes of specific tumor antigens, (3) only one or a small number of known tumor antigen genes can be introduced into a dendritic cell and (4) the methods are time-consuming and cumbersome.
SUMMARY OF THE INVENTION
[0006] Some embodiments relate to an isolated dendritic cell comprising a phagocytosed component consisting essentially of (i) a particle and (ii) a tumor lysate loaded within the particle. In specific embodiments, the tumor lysate is present in an amount from about 200 jig to about 500 jig. In specific embodiments, the tumor lysate is present in an amount of about 200 g.
[0007] In some embodiments, the tumor lysate is a lysate selected from a cancer selected from the group consisting of breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer and ocular melanoma.
[0008] In some embodiments, the particle is a yeast cell wall particle. In some embodiments, the dendritic cell is an immature cell that has been isolated for no more than 8 days.
[0009] Another embodiment relates to a vaccine comprising the foregoing isolated dendritic cell.
[0010] Some embodiments relate to a method for producing an isolated dendritic cell containing a tumor lysate loaded particle comprising: (i) loading the tumor lysate into the particle to produce the tumor lysate loaded particle; (ii) freeze-drying the tumor lysate loaded particle; and (iii) incubating the tumor lysate loaded particle with a dendritic cell, wherein the incubating causes the dendritic cell to phagocytose the tumor lysate loaded particle.
[0011] In specific embodiments, the foregoing method further comprises (a) resuspending the tumor lysate loaded particle in solution and (b) freeze-drying the resuspended solution before step (iii). In specific embodiments, the tumor lysate is produced by freezing and thawing the tumor. In specific embodiments, the foregoing method further comprises repeating the freezing and thawing steps. In specific embodiments, the foregoing method further comprises cryopreserving the tumor lysate at -150 C.
-2-[0012] In specific embodiments, step (iii) comprises: (a) adding tumor lysate into a yeast cell wall particle, (b) incubating the yeast cell wall particle, (c) freeze-drying the yeast cell wall particle and (d) washing the yeast cell wall, wherein steps (b)-(c) are repeated at least once with a step of adding water into the yeast cell particle before step (b) is repeated.
[0013] In specific embodiments, step (iii) comprises: (a) contacting the tumor lysate loaded particle and the dendritic cell at a ratio of about 100:1, (b) incubating the tumor lysate loaded particle with the dendritic cell for 1 to 2 hours and (c) collecting the dendritic cell and washing the cell.
[0014] In a preferred embodiment, a small amount of one or more immune response enhancing adjuvants is added to the tumor lysis buffer prior to incubating with a dendritic cell. The addition of one or more adjuvants increases the effects of the tumor lysate on the dendritic cell while dramatically decreasing any systemic effects from such adjuvants.
Commonly used adjuvants include but are not limited to proteins, peptides, nucleic acids and carbohydrates.
[0015] Exemplary adjuvants include but are not limited to monophosphoryl lipid A, GpC
ologonucleotides (such as GpC DNA), Poly I:C, Poly ICLC, potent MHC II epitope peptides, beta glucan, and dendritic cell stimulating cytokines such as IL-12. Suitable adjuvants are those molecules known to interact with receptors on dendritic cells in order to activate dendritic cells and further stimulate a more robust generation of T cells, such as CD4+ and CD8+ T cells.
[0016] In one embodiment, the amount of one or more immune response enhancing adjuvants is at least about 5 jig, at least about 10 jig, at least about 15 jig, at least about 20 jig, at least about 25 g, at least about 30 jig, at least about 35 jig, at least about 40 jig, at least about 45 jig, at least about 50 g, at least about 60 jig, at least about 70 gg, at least about 80 jig, at least about 80 g, at least about 90 jig, or at least about 100 jig. In one embodiment, the amount of adjuvant represents between 1-10% of the total lysate amount.
The amount of adjuvant is sufficient to stimulate receptors, such as the toll-like receptor, on the dendritic cell.
[0013] In specific embodiments, step (iii) comprises: (a) contacting the tumor lysate loaded particle and the dendritic cell at a ratio of about 100:1, (b) incubating the tumor lysate loaded particle with the dendritic cell for 1 to 2 hours and (c) collecting the dendritic cell and washing the cell.
[0014] In a preferred embodiment, a small amount of one or more immune response enhancing adjuvants is added to the tumor lysis buffer prior to incubating with a dendritic cell. The addition of one or more adjuvants increases the effects of the tumor lysate on the dendritic cell while dramatically decreasing any systemic effects from such adjuvants.
Commonly used adjuvants include but are not limited to proteins, peptides, nucleic acids and carbohydrates.
[0015] Exemplary adjuvants include but are not limited to monophosphoryl lipid A, GpC
ologonucleotides (such as GpC DNA), Poly I:C, Poly ICLC, potent MHC II epitope peptides, beta glucan, and dendritic cell stimulating cytokines such as IL-12. Suitable adjuvants are those molecules known to interact with receptors on dendritic cells in order to activate dendritic cells and further stimulate a more robust generation of T cells, such as CD4+ and CD8+ T cells.
[0016] In one embodiment, the amount of one or more immune response enhancing adjuvants is at least about 5 jig, at least about 10 jig, at least about 15 jig, at least about 20 jig, at least about 25 g, at least about 30 jig, at least about 35 jig, at least about 40 jig, at least about 45 jig, at least about 50 g, at least about 60 jig, at least about 70 gg, at least about 80 jig, at least about 80 g, at least about 90 jig, or at least about 100 jig. In one embodiment, the amount of adjuvant represents between 1-10% of the total lysate amount.
The amount of adjuvant is sufficient to stimulate receptors, such as the toll-like receptor, on the dendritic cell.
-3-[0017] Some embodiments relate to a method for treating cancer, comprising administering a vaccine comprising the foregoing isolated dendritic cell. In specific embodiments, the cancer is selected from the group consisting of breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer and ocular melanoma.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 depicts a process for producing dendritic cells.
[0019] FIG. 2 depicts a process for producing tumor lysate.
[0020] FIG. 3 depicts a process for producing yeast cell wall particles.
[0021] FIG. 4 depicts a process for loading tumor lysate into yeast cell wall particles.
[0022] FIG. 5 depicts a process for producing tumor lysate particle loaded dendritic cells.
[0023] FIG. 6 is a graph comparing the effect of tumor lysate particle loaded dendritic cells versus antigen pulsing of dcndritic cells on B3Z cells.
[0024] FIG. 7A shows the lungs of control mice afflicted with B16F0 murinc melanoma.
FIG. 7B shows the lungs of mice afflicted with B16F0 murine melanoma but treated with tumor lysate particle loaded dendritic cells.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0025] Reference is made herein to various methodologies known to those of ordinary skill in the art.
[0026] As used herein, the singular forms "a," "an," and "the" designate both the singular and the plural, unless expressly stated to designate the singular only.
Likewise, singular
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 depicts a process for producing dendritic cells.
[0019] FIG. 2 depicts a process for producing tumor lysate.
[0020] FIG. 3 depicts a process for producing yeast cell wall particles.
[0021] FIG. 4 depicts a process for loading tumor lysate into yeast cell wall particles.
[0022] FIG. 5 depicts a process for producing tumor lysate particle loaded dendritic cells.
[0023] FIG. 6 is a graph comparing the effect of tumor lysate particle loaded dendritic cells versus antigen pulsing of dcndritic cells on B3Z cells.
[0024] FIG. 7A shows the lungs of control mice afflicted with B16F0 murinc melanoma.
FIG. 7B shows the lungs of mice afflicted with B16F0 murine melanoma but treated with tumor lysate particle loaded dendritic cells.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0025] Reference is made herein to various methodologies known to those of ordinary skill in the art.
[0026] As used herein, the singular forms "a," "an," and "the" designate both the singular and the plural, unless expressly stated to designate the singular only.
Likewise, singular
-4-CA
forms of terms designate both the singular and plural, unless expressly stated to designate the singular only. For example, "vaccine" means "vaccine" or "vaccines."
[0027] The term "about" in connection with numerical values and ranges means that the number comprehended is not limited to the exact number set forth herein, and is intended to refer to ranges substantially within the quoted range while not departing from the scope of the invention. As used herein, "about" will be understood by persons of ordinary skill in the art and will vary to some extent on the context in which it is used.
[0028] As used herein "subject" or "patient" denotes any animal in need of treatment with a vaccine. For example, a subject may be suffering from or at risk of developing a condition that can be treated or prevented with a vaccine. As used herein "subject" or "patient"
includes humans.
[0029] As used herein, the phrases "therapeutically effective amount" and "therapeutic level" mean that vaccine dosage or plasma concentration in a subject, respectively, that provides the specific response for which the vaccine is administered in a subject in need of such treatment. For convenience only, exemplary dosages, vaccine delivery amounts, therapeutically effective amounts and therapeutic levels are provided below with reference to adult human subject. Those skilled in the art can adjust such amounts in accordance with standard practices as needed to treat a specific subject and/or condition/disease.
[0030] Tumor Lysate [0031] As described herein, "tumor lysate" refers to a tumor that has been lysed. Tumor lysis can occur under a number of conditions, including repeated freezing and thawing of the tumor, physical breakage of the tumor by homogenizing, contact with a hyper-or hypo-tonic solution and contact with one or more non-ionic detergents. The tumor lysate is not cross-linked during the lysing process. In another embodiment, the tumor lysate is produced by mincing, grinding or mashing the tumor, or otherwise pulverizing the tumor using any known technique in the art. In another embodiment, the tumor lysate is produced by mincing, grinding, mashing or pulverizing the tumor in the presence of phosphate buffer solution (PBS), such as 1X PBS.
forms of terms designate both the singular and plural, unless expressly stated to designate the singular only. For example, "vaccine" means "vaccine" or "vaccines."
[0027] The term "about" in connection with numerical values and ranges means that the number comprehended is not limited to the exact number set forth herein, and is intended to refer to ranges substantially within the quoted range while not departing from the scope of the invention. As used herein, "about" will be understood by persons of ordinary skill in the art and will vary to some extent on the context in which it is used.
[0028] As used herein "subject" or "patient" denotes any animal in need of treatment with a vaccine. For example, a subject may be suffering from or at risk of developing a condition that can be treated or prevented with a vaccine. As used herein "subject" or "patient"
includes humans.
[0029] As used herein, the phrases "therapeutically effective amount" and "therapeutic level" mean that vaccine dosage or plasma concentration in a subject, respectively, that provides the specific response for which the vaccine is administered in a subject in need of such treatment. For convenience only, exemplary dosages, vaccine delivery amounts, therapeutically effective amounts and therapeutic levels are provided below with reference to adult human subject. Those skilled in the art can adjust such amounts in accordance with standard practices as needed to treat a specific subject and/or condition/disease.
[0030] Tumor Lysate [0031] As described herein, "tumor lysate" refers to a tumor that has been lysed. Tumor lysis can occur under a number of conditions, including repeated freezing and thawing of the tumor, physical breakage of the tumor by homogenizing, contact with a hyper-or hypo-tonic solution and contact with one or more non-ionic detergents. The tumor lysate is not cross-linked during the lysing process. In another embodiment, the tumor lysate is produced by mincing, grinding or mashing the tumor, or otherwise pulverizing the tumor using any known technique in the art. In another embodiment, the tumor lysate is produced by mincing, grinding, mashing or pulverizing the tumor in the presence of phosphate buffer solution (PBS), such as 1X PBS.
-5-[0032] In specific embodiments, the tumor lysate is produced from a solid tumor weighing a minimum of 200 to 500 lug.
[0033] In another embodiment, the tumor lysate is produced by mincing, grinding, mashing or pulverizing the tumor followed by repeated freezing and thawing. In specific embodiments, the minced tumor is frozen and thawed multiple times. In specific embodiments, the minced tumor is frozen and thawed at least 1, 2, 3 or 4 times. In some embodiments, the freezing is performed in liquid nitrogen, and can be performed for 20 minutes. In specific embodiments, the thawing is performed at room temperature. In another embodiment, the tumor lysate is stored at a temperature of about -135 C or below after the freezing and thawing process. In specific embodiments, the tumor lysate is store at a temperature of -150 C or below after the freezing and thawing process.
[0034] The tumor lysate can be prepared from any solid tumor including, but not limited to carcinomas, and sarcomas. In some embodiments, the solid tumors are from tumors relating to breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer and ocular melanoma.
[0035] A number of immune response enhancing agents can be added to the tumor lysis buffer as adjuvants to boost immune response such that when the tumor lysate is incubated with a dendritic cell, the adjuvants exhibit an increased effect on the dendritic cell while dramatically decreasing any systemic effects from such adjuvants.
[0036] It is within the purview of one of ordinary skill in the art to select one or more suitable adjuvants for this invention. For instance, monophosphoryl lipid A, GpC
oligonucleotides, Poly I:C, Poly ICLC, potent MHC II epitope peptides, and dendritic cell stimulating cytokines such as IL-12, 1L-2, and GM-CSF arc good adjuvant candidates of this invention.
[0037] Particle [0038] As described herein, "particle" refers to any hollow and porous structure that can contain tumor lysate therein and also allow the lysate to exit the structure.
In some
[0033] In another embodiment, the tumor lysate is produced by mincing, grinding, mashing or pulverizing the tumor followed by repeated freezing and thawing. In specific embodiments, the minced tumor is frozen and thawed multiple times. In specific embodiments, the minced tumor is frozen and thawed at least 1, 2, 3 or 4 times. In some embodiments, the freezing is performed in liquid nitrogen, and can be performed for 20 minutes. In specific embodiments, the thawing is performed at room temperature. In another embodiment, the tumor lysate is stored at a temperature of about -135 C or below after the freezing and thawing process. In specific embodiments, the tumor lysate is store at a temperature of -150 C or below after the freezing and thawing process.
[0034] The tumor lysate can be prepared from any solid tumor including, but not limited to carcinomas, and sarcomas. In some embodiments, the solid tumors are from tumors relating to breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer and ocular melanoma.
[0035] A number of immune response enhancing agents can be added to the tumor lysis buffer as adjuvants to boost immune response such that when the tumor lysate is incubated with a dendritic cell, the adjuvants exhibit an increased effect on the dendritic cell while dramatically decreasing any systemic effects from such adjuvants.
[0036] It is within the purview of one of ordinary skill in the art to select one or more suitable adjuvants for this invention. For instance, monophosphoryl lipid A, GpC
oligonucleotides, Poly I:C, Poly ICLC, potent MHC II epitope peptides, and dendritic cell stimulating cytokines such as IL-12, 1L-2, and GM-CSF arc good adjuvant candidates of this invention.
[0037] Particle [0038] As described herein, "particle" refers to any hollow and porous structure that can contain tumor lysate therein and also allow the lysate to exit the structure.
In some
-6-embodiments, the size of the particle is about 0.5 to about 5 gm, which approximates the size of bacterium to allow the particle to be ingested by monocytes, such as dendritic cells. In specific embodiments, the size of the particle is about 0.5 to about 1 pm. In specific embodiments, the size of the particle is about 0.5 to about 2.5 ium. In some embodiments, the particle can be any particle with a glycan network, so long as the particle is about 0.5 to about pm in size.
[0039] In some embodiments, the particle is a bead vector. The bead vector is not limited by shape or material, but can be any shape, size or material that allows the bead vector to be phagocytosed by monocytes, including dendritic cells.
[0040] In another embodiment, the particle is a yeast cell wall particle ("YCWP"). The YCWP is prepared from yeast cell wall such that the particle is porous and can contain lysate therein. In one embodiment, the YCWP is prepared from Saccharomyces cerevisiae. In another embodiment, the YCWP is a zymosan particle. In another embodiment, the YCWP
approximates the size of microbial structures that cells of the mononuclear phagocyte system and other phagocytic cells typically ingests. In specific embodiments, the YCWP is about 1-5 pm.
[0041] In one embodiment, the YCWP is prepared by (a) suspending yeast to produce a suspension, (b) incubating the suspension, (c) centrifuging the suspension and removing the supernatant and (d) recovering the resulting YCWP. In another embodiment, steps (a)-(d) are repeated at least 1, 2, 3 or 4 times.
[0042] In another embodiment, the YCWP is prepared by (a) suspending yeast in a solution to produce a first suspension, (b) incubating the first suspension, (c) centrifuging the first suspension and removing the supernatant, (d) suspending the resulting pellet to produce a second suspension, (e) incubating the second suspension, (f) centrifuging the second suspension and removing the supernatant and (g) washing the resulting pellet to recover the YCWP. In another embodiment, the YCWP is sterilized.
[0043] In specific embodiments, the yeast is suspended in NaOH, including 1M
NaOH. In specific embodiments, the first suspension is incubated at about 80 C for about 1 hour or for 1 hour. In specific embodiments, the centrifuging is performed at about 2000 times gravity
[0039] In some embodiments, the particle is a bead vector. The bead vector is not limited by shape or material, but can be any shape, size or material that allows the bead vector to be phagocytosed by monocytes, including dendritic cells.
[0040] In another embodiment, the particle is a yeast cell wall particle ("YCWP"). The YCWP is prepared from yeast cell wall such that the particle is porous and can contain lysate therein. In one embodiment, the YCWP is prepared from Saccharomyces cerevisiae. In another embodiment, the YCWP is a zymosan particle. In another embodiment, the YCWP
approximates the size of microbial structures that cells of the mononuclear phagocyte system and other phagocytic cells typically ingests. In specific embodiments, the YCWP is about 1-5 pm.
[0041] In one embodiment, the YCWP is prepared by (a) suspending yeast to produce a suspension, (b) incubating the suspension, (c) centrifuging the suspension and removing the supernatant and (d) recovering the resulting YCWP. In another embodiment, steps (a)-(d) are repeated at least 1, 2, 3 or 4 times.
[0042] In another embodiment, the YCWP is prepared by (a) suspending yeast in a solution to produce a first suspension, (b) incubating the first suspension, (c) centrifuging the first suspension and removing the supernatant, (d) suspending the resulting pellet to produce a second suspension, (e) incubating the second suspension, (f) centrifuging the second suspension and removing the supernatant and (g) washing the resulting pellet to recover the YCWP. In another embodiment, the YCWP is sterilized.
[0043] In specific embodiments, the yeast is suspended in NaOH, including 1M
NaOH. In specific embodiments, the first suspension is incubated at about 80 C for about 1 hour or for 1 hour. In specific embodiments, the centrifuging is performed at about 2000 times gravity
-7-for about 10 minutes, or at 2000 times gravity for 10 minutes. In specific embodiments, the pellet is suspended in water, including water at about pH 4.5 or at pH 4.5. In specific embodiments, the second suspension is incubated at about 55 C for about 1 hour or at 55 C
for 1 hour. In specific embodiments, the pellet is washed in water at least 1, 2, 3 or 4 times.
In specific embodiments, the pellet is washed once.
[0044] In another embodiment, the YCWP is sterilized using isopropanol and/or acetone following washing of the pellet. In specific embodiments, other known alcohols arc appropriate. In specific embodiments, the YCWP is allowed to fully dry after sterilization.
In another embodiment, the YCWP is resuspended after being allowed to dry. In specific embodiments, the YCWP is resuspended in PBS, such as 1X PBS. In another embodiment, the YCWP is allowed to dry and then frozen before the tumor lysate is loaded into the YCWP, in order to place it in storage before use. In specific embodiments, the YCWP is freeze dried and store at about 4 C or lower. In specific embodiments, the YCWP is freeze dried and store at 4 C.
[0045] Tumor Lysate Loaded Particle [0046] The particle is loaded with tumor lysate. In one embodiment, the tumor lysate is loaded into the particle by incubating the lysate and a suspension of particles together and allowing the lysate to penetrate into the hollow insides of the particles.
[0047] In another embodiment, after the particle is loaded with tumor lysate, the combination is freeze-dried to create an anhydrous tumor lysate within the particle. By freeze-drying the particle loaded with tumor lysate, the lysate is trapped within the particle and ready to be phagocytosed by a monocyte, such as a dendritic cell. In specific embodiments, the freeze-drying is the only mechanism used to trap the lysate within the particle. In specific embodiments, the entrapment is not caused by a separate component blocking the lysate from exiting the particle, for example, by physical entrapment, hydrophobic binding, any other binding. In specific embodiments, the entrapment is not caused by crosslinking or otherwise attaching the lysate to the particle outside of any attachment that may occur upon freeze-drying.
for 1 hour. In specific embodiments, the pellet is washed in water at least 1, 2, 3 or 4 times.
In specific embodiments, the pellet is washed once.
[0044] In another embodiment, the YCWP is sterilized using isopropanol and/or acetone following washing of the pellet. In specific embodiments, other known alcohols arc appropriate. In specific embodiments, the YCWP is allowed to fully dry after sterilization.
In another embodiment, the YCWP is resuspended after being allowed to dry. In specific embodiments, the YCWP is resuspended in PBS, such as 1X PBS. In another embodiment, the YCWP is allowed to dry and then frozen before the tumor lysate is loaded into the YCWP, in order to place it in storage before use. In specific embodiments, the YCWP is freeze dried and store at about 4 C or lower. In specific embodiments, the YCWP is freeze dried and store at 4 C.
[0045] Tumor Lysate Loaded Particle [0046] The particle is loaded with tumor lysate. In one embodiment, the tumor lysate is loaded into the particle by incubating the lysate and a suspension of particles together and allowing the lysate to penetrate into the hollow insides of the particles.
[0047] In another embodiment, after the particle is loaded with tumor lysate, the combination is freeze-dried to create an anhydrous tumor lysate within the particle. By freeze-drying the particle loaded with tumor lysate, the lysate is trapped within the particle and ready to be phagocytosed by a monocyte, such as a dendritic cell. In specific embodiments, the freeze-drying is the only mechanism used to trap the lysate within the particle. In specific embodiments, the entrapment is not caused by a separate component blocking the lysate from exiting the particle, for example, by physical entrapment, hydrophobic binding, any other binding. In specific embodiments, the entrapment is not caused by crosslinking or otherwise attaching the lysate to the particle outside of any attachment that may occur upon freeze-drying.
-8-
9 PCT/US2013/063091 [0048] In another embodiment, the particle is resuspended in solution after the freeze-drying. In specific embodiments, the solution is water. In specific embodiments, the particle is resuspended to allow additional tumor lysate to penetrate the particle and then the combination is freeze-dried again. In other embodiments, the combination is subjected to multiple freeze-drying and resuspensions. In other embodiments, the tumor lysate loaded particle is sterilized in ethanol after the freeze-drying and before use.
[0049] In specific embodiments, the tumor lysate is loaded into the particle by (a) incubating the lysate and a suspension of the particles, allowing the lysate to penetrate into the hollow insides of the particles and freeze-drying the suspension of particles loaded with lysate and (b) optionally resuspending the particles, incubating the resuspended particles and freeze drying the resuspended particles and any tumor lysate not already in the particle.
[0050] In specific embodiments using YCWPs, the number of YCWPs is about 1 x 109 and the volume of tumor lysate is about 50 iaL (generated from about 200 lag of tumor tissue). In specific embodiments, the number of YCWPs is 1 x 109 and the volume of tumor lysate is 50 (from about 200 jig of tumor tissue). In specific embodiments, the incubation in step (a) is for about 2 hours at about 4 C. In specific embodiments, the incubation in step (a) is for 2 hours at 4 C. In some embodiments, the foregoing suspension is freeze dried in step (b) over a period of about 2 hours or over a period of 2 hours. In some embodiments, the YCWPs in step (c) are resuspended in water, including about 50 IA of water or 50 IA of water. In some embodiments, the resuspended YCWPs are incubated in step (d) for about 2 hours at about 4 C or for 2 hours at 4 C.
[0051] Dendritic Cell [0052] As described herein, "dendritic cell" refers to a cell generated from a peripheral blood mononuclear cell (-PBMC"). In one embodiment, a dendritic cell is prepared by (a) collecting blood, (b) diluting the blood, (c) performing a density gradient separation of PBMCs, (d) lysing red blood cells and washing the PBMCs, (e) incubating the PBMCs, (f) removing nonadherent cells and (g) culturing adherent cells in media.
[0053] In some embodiments, the dendritic cell is an immature dendritic cell that has been cultured for no more than 5 days. In other embodiments, the dendritic cell has been cultured for 6-8 days.
[0054] In specific embodiments, the blood is heparinized. In specific embodiments, the density gradient separation at step (c) comprises placing the blood in a Lymphocyte Separation Medium and then centrifuging the blood. In specific embodiments, the centrifuging is performed at about 1000 times gravity for about 20 minutes or at 1000 times gravity for 20 minutes. In specific embodiments, a second centrifuging is performed before step (d) and is performed at about 500g for about 5 minutes or is performed at 500g for 5 minutes. In specific embodiments, a third centrifuging is performed before step (d) and is performed at about 500g for about 10 minutes or is performed at 500g for 10 minutes. In specific embodiments, the lysing is performed using an ACK lysing solution, followed by incubation, preferably at room temperature for about 5 minutes, and followed by a subsequent centrifugation. In specific embodiments, the PBMCs are washed in medium. In specific embodiments, the PBMCs are incubated at step (e) in flasks at about 37 C for about 1-2 hours or at 37 C for 1-2 hours. In specific embodiments, serum-free DC
media is added to the flask.
[0055] In some embodiments, one or more cytokines is present in the culture media, including, but not limited to, granulocyte macrophage colony stimulating factor (800 units/m1) and IL-4 (500 units/m1).
[0056] Tumor Lysate Loaded Particles Phagocytosed in Dendritic Cells [0057] The tumor lysate loaded particle is phagocytosed within a monocyte, preferably a dendrite cell. In one embodiment, the tumor lysate loaded particle is incubated with a dendritic cell such that the cell phagocytoses the tumor lysate loaded particle.
[0058] In specific embodiments, the particle is incubated with the dendritic cell at a ratio of about 100:1 or at a ratio of 100:1. The incubation can be performed for in about 1 hour, 1 hour or preferably less than 1 hour.
[0049] In specific embodiments, the tumor lysate is loaded into the particle by (a) incubating the lysate and a suspension of the particles, allowing the lysate to penetrate into the hollow insides of the particles and freeze-drying the suspension of particles loaded with lysate and (b) optionally resuspending the particles, incubating the resuspended particles and freeze drying the resuspended particles and any tumor lysate not already in the particle.
[0050] In specific embodiments using YCWPs, the number of YCWPs is about 1 x 109 and the volume of tumor lysate is about 50 iaL (generated from about 200 lag of tumor tissue). In specific embodiments, the number of YCWPs is 1 x 109 and the volume of tumor lysate is 50 (from about 200 jig of tumor tissue). In specific embodiments, the incubation in step (a) is for about 2 hours at about 4 C. In specific embodiments, the incubation in step (a) is for 2 hours at 4 C. In some embodiments, the foregoing suspension is freeze dried in step (b) over a period of about 2 hours or over a period of 2 hours. In some embodiments, the YCWPs in step (c) are resuspended in water, including about 50 IA of water or 50 IA of water. In some embodiments, the resuspended YCWPs are incubated in step (d) for about 2 hours at about 4 C or for 2 hours at 4 C.
[0051] Dendritic Cell [0052] As described herein, "dendritic cell" refers to a cell generated from a peripheral blood mononuclear cell (-PBMC"). In one embodiment, a dendritic cell is prepared by (a) collecting blood, (b) diluting the blood, (c) performing a density gradient separation of PBMCs, (d) lysing red blood cells and washing the PBMCs, (e) incubating the PBMCs, (f) removing nonadherent cells and (g) culturing adherent cells in media.
[0053] In some embodiments, the dendritic cell is an immature dendritic cell that has been cultured for no more than 5 days. In other embodiments, the dendritic cell has been cultured for 6-8 days.
[0054] In specific embodiments, the blood is heparinized. In specific embodiments, the density gradient separation at step (c) comprises placing the blood in a Lymphocyte Separation Medium and then centrifuging the blood. In specific embodiments, the centrifuging is performed at about 1000 times gravity for about 20 minutes or at 1000 times gravity for 20 minutes. In specific embodiments, a second centrifuging is performed before step (d) and is performed at about 500g for about 5 minutes or is performed at 500g for 5 minutes. In specific embodiments, a third centrifuging is performed before step (d) and is performed at about 500g for about 10 minutes or is performed at 500g for 10 minutes. In specific embodiments, the lysing is performed using an ACK lysing solution, followed by incubation, preferably at room temperature for about 5 minutes, and followed by a subsequent centrifugation. In specific embodiments, the PBMCs are washed in medium. In specific embodiments, the PBMCs are incubated at step (e) in flasks at about 37 C for about 1-2 hours or at 37 C for 1-2 hours. In specific embodiments, serum-free DC
media is added to the flask.
[0055] In some embodiments, one or more cytokines is present in the culture media, including, but not limited to, granulocyte macrophage colony stimulating factor (800 units/m1) and IL-4 (500 units/m1).
[0056] Tumor Lysate Loaded Particles Phagocytosed in Dendritic Cells [0057] The tumor lysate loaded particle is phagocytosed within a monocyte, preferably a dendrite cell. In one embodiment, the tumor lysate loaded particle is incubated with a dendritic cell such that the cell phagocytoses the tumor lysate loaded particle.
[0058] In specific embodiments, the particle is incubated with the dendritic cell at a ratio of about 100:1 or at a ratio of 100:1. The incubation can be performed for in about 1 hour, 1 hour or preferably less than 1 hour.
-10-[0059] In specific embodiments, the incubated dendritic cell containing the tumor lysate particle is collected and washed, for example, at least 1, 2, 3 or 4 times. In other embodiments, the dendritic cells are incubated after washing and resuspended in freezing medium. In specific embodiments, the resuspension produces a concentration of about 10 x 106 cells per ml or 10 x 106 cells per ml. In specific embodiments, the resuspension is frozen for storage before use.
[0060] Vaccine [0061] In one embodiment, the dendritic cell containing a tumor lysate loaded particle is used as a vaccine to prevent and/or treat a disease, including cancer. The disease to be treated is not particularly limiting, but depends on the particular tumor lysate loaded into the particle. For example, a vaccine using tumor lysate from a breast cancer tumor is used to treat breast cancer. In another embodiment, a patient's own tumor cells are used to create the vaccine. For example, the vaccine can be produced using tumor lysate from a tumor associated with breast cancer and then administered to the breast cancer patient from which the tumor was extracted. In another embodiment, about 200 ht of a 10 x 106 concentration of dendritic cells containing tumor lysate loaded particles forms one dose of the vaccine.
[0062] In another embodiment, the dose is administered by diluting the 200 ht aliquot to a final volume of 1 ml before administering the dose to a patient. In specific embodiments, the aliquot is diluted with sterile saline containing 5% human serum albumin. In specific embodiments, the 200 iut aliquot will need to be thawed before dilution. In such a scenario, the length of time between thawing and administration of the dose to a patient will be no longer than 2 hours. In some embodiments, the diluted aliquot is administered in a 3 cc syringe. In some embodiments, a syringe needle no smaller than 23 gauge is used.
[0063] In another embodiment, a patient is administered at least 1, 2, 3 or 4 doses. In specific embodiments, a patient is re-vaccinated once every 4 weeks. In specific embodiments, about 1-2 million dendritic cells containing tumor lysate loaded particles will be administered at each vaccination. In another embodiment, the dendritic cells containing tumor lysate loaded particles are administered to a patient by injection. In specific
[0060] Vaccine [0061] In one embodiment, the dendritic cell containing a tumor lysate loaded particle is used as a vaccine to prevent and/or treat a disease, including cancer. The disease to be treated is not particularly limiting, but depends on the particular tumor lysate loaded into the particle. For example, a vaccine using tumor lysate from a breast cancer tumor is used to treat breast cancer. In another embodiment, a patient's own tumor cells are used to create the vaccine. For example, the vaccine can be produced using tumor lysate from a tumor associated with breast cancer and then administered to the breast cancer patient from which the tumor was extracted. In another embodiment, about 200 ht of a 10 x 106 concentration of dendritic cells containing tumor lysate loaded particles forms one dose of the vaccine.
[0062] In another embodiment, the dose is administered by diluting the 200 ht aliquot to a final volume of 1 ml before administering the dose to a patient. In specific embodiments, the aliquot is diluted with sterile saline containing 5% human serum albumin. In specific embodiments, the 200 iut aliquot will need to be thawed before dilution. In such a scenario, the length of time between thawing and administration of the dose to a patient will be no longer than 2 hours. In some embodiments, the diluted aliquot is administered in a 3 cc syringe. In some embodiments, a syringe needle no smaller than 23 gauge is used.
[0063] In another embodiment, a patient is administered at least 1, 2, 3 or 4 doses. In specific embodiments, a patient is re-vaccinated once every 4 weeks. In specific embodiments, about 1-2 million dendritic cells containing tumor lysate loaded particles will be administered at each vaccination. In another embodiment, the dendritic cells containing tumor lysate loaded particles are administered to a patient by injection. In specific
-11-embodiments, the tumor lysate loaded particles are injected in a patient at or near (1) a tumor or (2) a lymph node.
[0064] In some embodiments, the vaccine is not administered with any other immunosuppressive treatment, such as steroids or chemotherapy. The vaccine can be administered using any technique, including intravenous injection and inhalation.
[0065] The vaccine can also contain biological adjuvants, including but not limited to nucleic acids such as GpC oligonucleotides, proteins or peptide epitopes such as the tetanus toxoid MHC class 11-binding p30 peptide.
[0066] EXAMPLE 1: Preparing Dendritic Cells [0067] Dendritic cells were generated from a patient's PBMCs. PBMCs were collected from the patient by a blood draw of 200 ml following standard operating procedures. The blood was then transferred to 250 ml centrifuge tubes and diluted 1:1 with 1X
PBS. Then, 35 ml of the diluted blood was layered over 15 ml of room temperature Lymphocyte Separation Medium (LSM; Mediatech) in 50 ml tubes and centrifuged at 1000g for 20 minutes at room temperature. The PBMC layers were removed by pipetting from the LSM gradients and placed into clean 50 ml centrifuge tubes. Four volumes of 1X PBS were added and the tubes were inverted to mix the contents. The PBMCs were then centrifuged at 500g at room temperature for 5 minutes. Ten ml of 1X PBS were added into each tube and the cells were resuspended and pooled into 1 tube. The PBMCs were again centrifuged at 500g at room temperature for 10 minutes, resuspended in 20 to 40 ml of ACK lysing solution (Cambrex) and incubated at room temperature for 5 minutes. The cells were then centrifuged again at 1500 rpm for 5 minutes. The PBMCs were resuspended in 30 ml RPMI-1640 medium (Mediatech). The cells were then transferred into 2-4 T75 flasks. The flasks were incubated at 37 C for 1 to 2 hours. The non-adherent cells were then removed by rinsing. Afterwards, ml of 1X PBS were added into each flask, the flask swirled, and the PBS
removed.
Afterwards, 10 ml of complete DC media (serum-free DC Medium + 800 U/ml GM-CSF
+
1000 U/ml IL-4) was added to each flask. The flasks were then incubated at 37 C, 5% CO2 for 2 days. On Day 3, 10 ml of complete DC medium was added into each flask.
The cells
[0064] In some embodiments, the vaccine is not administered with any other immunosuppressive treatment, such as steroids or chemotherapy. The vaccine can be administered using any technique, including intravenous injection and inhalation.
[0065] The vaccine can also contain biological adjuvants, including but not limited to nucleic acids such as GpC oligonucleotides, proteins or peptide epitopes such as the tetanus toxoid MHC class 11-binding p30 peptide.
[0066] EXAMPLE 1: Preparing Dendritic Cells [0067] Dendritic cells were generated from a patient's PBMCs. PBMCs were collected from the patient by a blood draw of 200 ml following standard operating procedures. The blood was then transferred to 250 ml centrifuge tubes and diluted 1:1 with 1X
PBS. Then, 35 ml of the diluted blood was layered over 15 ml of room temperature Lymphocyte Separation Medium (LSM; Mediatech) in 50 ml tubes and centrifuged at 1000g for 20 minutes at room temperature. The PBMC layers were removed by pipetting from the LSM gradients and placed into clean 50 ml centrifuge tubes. Four volumes of 1X PBS were added and the tubes were inverted to mix the contents. The PBMCs were then centrifuged at 500g at room temperature for 5 minutes. Ten ml of 1X PBS were added into each tube and the cells were resuspended and pooled into 1 tube. The PBMCs were again centrifuged at 500g at room temperature for 10 minutes, resuspended in 20 to 40 ml of ACK lysing solution (Cambrex) and incubated at room temperature for 5 minutes. The cells were then centrifuged again at 1500 rpm for 5 minutes. The PBMCs were resuspended in 30 ml RPMI-1640 medium (Mediatech). The cells were then transferred into 2-4 T75 flasks. The flasks were incubated at 37 C for 1 to 2 hours. The non-adherent cells were then removed by rinsing. Afterwards, ml of 1X PBS were added into each flask, the flask swirled, and the PBS
removed.
Afterwards, 10 ml of complete DC media (serum-free DC Medium + 800 U/ml GM-CSF
+
1000 U/ml IL-4) was added to each flask. The flasks were then incubated at 37 C, 5% CO2 for 2 days. On Day 3, 10 ml of complete DC medium was added into each flask.
The cells
-12-were then incubated for another 2 days. On Day 6 or 7, the resulting immature DCs were ready for use.
[0068] Figure 1 provides an overview of the generation of dendritic cells.
[0069] EXAMPLE 2: Preparing Tumor Lysate [0070] A tumor sample was obtained from a patient. After separating fat and necrotic tissue away from the tumor tissue, the tissue was weighed and 1X PBS added (50 IA of PBS
per 200)tg of tissue) and the tumor was minced thoroughly with scalpels in 1X
PBS. The tumor cells were then subjected to 4 cycles of freeze and thaw. The freezing was performed in liquid nitrogen for 20 minutes and the thawing was performed at room temperature.
Prepared tumor lysate was quantified by a spectrophotometer. An aliquot was taken for quality control testing. The remainder was stored at < -135 C in preparation for vaccine preparation. Small amounts of adjuvant can optionally be added after the freeze thaw cycles.
[0071] Figure 2 provides an overview of the tumor cell lysate processing.
[0072] EXAMPLE 3: Preparing YCWP
[0073] YCWPs were prepared from Fleishmans Baker's Yeast or equivalent.
Briefly, 10 g of Fleishmans Baker's yeast was suspended in 100 ml of 1 M NaOH and heated to 80 C for one hour. The undissolved yeast cell walls were recovered by centrifugation at 2000 x g for minutes. The recovered yeast cell walls were then resuspended in 100 ml of water with the pH adjusted to 4.5 with HC1 and incubated at 55 C for an additional hour, and subsequently recovered by centrifugation. The recovered YCWPs were then washed with water once, isopropanol 4 times and finally acetone 2 times. Once the YCWPs were fully dried they were resuspended in PBS, counted, aliquoted into groups of 1 X109 particles and freeze dried for use in manufacturing the vaccine.
[0074] Figure 3 provides an overview of the yeast cell wall particles processing.
[0075] EXAMPLE 4: Preparing YCWP
[0068] Figure 1 provides an overview of the generation of dendritic cells.
[0069] EXAMPLE 2: Preparing Tumor Lysate [0070] A tumor sample was obtained from a patient. After separating fat and necrotic tissue away from the tumor tissue, the tissue was weighed and 1X PBS added (50 IA of PBS
per 200)tg of tissue) and the tumor was minced thoroughly with scalpels in 1X
PBS. The tumor cells were then subjected to 4 cycles of freeze and thaw. The freezing was performed in liquid nitrogen for 20 minutes and the thawing was performed at room temperature.
Prepared tumor lysate was quantified by a spectrophotometer. An aliquot was taken for quality control testing. The remainder was stored at < -135 C in preparation for vaccine preparation. Small amounts of adjuvant can optionally be added after the freeze thaw cycles.
[0071] Figure 2 provides an overview of the tumor cell lysate processing.
[0072] EXAMPLE 3: Preparing YCWP
[0073] YCWPs were prepared from Fleishmans Baker's Yeast or equivalent.
Briefly, 10 g of Fleishmans Baker's yeast was suspended in 100 ml of 1 M NaOH and heated to 80 C for one hour. The undissolved yeast cell walls were recovered by centrifugation at 2000 x g for minutes. The recovered yeast cell walls were then resuspended in 100 ml of water with the pH adjusted to 4.5 with HC1 and incubated at 55 C for an additional hour, and subsequently recovered by centrifugation. The recovered YCWPs were then washed with water once, isopropanol 4 times and finally acetone 2 times. Once the YCWPs were fully dried they were resuspended in PBS, counted, aliquoted into groups of 1 X109 particles and freeze dried for use in manufacturing the vaccine.
[0074] Figure 3 provides an overview of the yeast cell wall particles processing.
[0075] EXAMPLE 4: Preparing YCWP
-13-[0076] Three grams of active dry yeast (Fleischmann's or equivalent) were washed three times in water by suspending the yeast in 30 mL of sterile water, vortexing, and centrifuging at 800-1000 x g for 5 minutes at room temperature. After decanting the supernatant, the yeast pellet was resuspended in 50 mL of 1 M NaOH and heated in a 90 C water bath for 1 hour.
[0077] The yeast suspension was subsequently centrifuged at 800-1000 x g for 5 minutes, and the pellet was resuspended in 25-30 mL of acid water (pH adjusted to 4.5 with HCI). The acid water wash step was repeated until the pH of the suspension is < 7Ø
Then the pellet was resuspended in 30 mL acid water and incubated in a 75 C water bath for 1 hour. The yeast pellet was recovered by centrifugation at 1000 x g for 5 minutes, and then washed with mL of sterile water 3 times, 10 mL of isopropanol 4 times and finally 10 mL of acetone 2 times. The acetone was carefully removed, and the pellet was spread evenly on the glass surface of a beaker, allowed to air dry overnight.
[0078] The dried YWCPs were collected and stored in a vacuum jar at 4 C and then washed in 10-15 mL of filtered 70% ethanol 3 times. The YWCPs were briefly sonicated on the final wash, and the sonication was repeated if necessary to disperse clumps. Once the ethanol was removed, the YWCPs were washed in sterile water. Aliquots of 100 1 of YWCPs were dispensed into 2.0 mL rounded bottom snap top centrifuge tubes, placed in freezer for 1 hour, freeze dried, and stored in a vacuum jar at 4 C for future use.
[0079] EXAMPLE 5: Loading Tumor Lysate into YCWP
[0080] A suspension of fully anhydrous YCWPs (1 X 109) was placed in contact with 50 uL of tumor lysate in PBS (from 200 jigs of tumor tissue) over a period of 2 hours at 4 C, allowing the lysate to penetrate into the hollow insides of the YCWPs to produce loaded YCWPs. The suspension was then freeze dried for 2 hours. After freeze drying, 50 iLtI, of water was added to the loaded YCWPs, incubated for another 2 hours at 4 C and again freeze dried to yield YCWPs with dry tumor lysate within their hollow insides.
The loaded YCWPs were then sterilized by washing in ethanol and maintained in ethanol.
[0081] Figure 4 provides an overview of the YCWPs loading procedure.
[0082] EXAMPLE 6: Loading YCWPs with Tumor Lysate
[0077] The yeast suspension was subsequently centrifuged at 800-1000 x g for 5 minutes, and the pellet was resuspended in 25-30 mL of acid water (pH adjusted to 4.5 with HCI). The acid water wash step was repeated until the pH of the suspension is < 7Ø
Then the pellet was resuspended in 30 mL acid water and incubated in a 75 C water bath for 1 hour. The yeast pellet was recovered by centrifugation at 1000 x g for 5 minutes, and then washed with mL of sterile water 3 times, 10 mL of isopropanol 4 times and finally 10 mL of acetone 2 times. The acetone was carefully removed, and the pellet was spread evenly on the glass surface of a beaker, allowed to air dry overnight.
[0078] The dried YWCPs were collected and stored in a vacuum jar at 4 C and then washed in 10-15 mL of filtered 70% ethanol 3 times. The YWCPs were briefly sonicated on the final wash, and the sonication was repeated if necessary to disperse clumps. Once the ethanol was removed, the YWCPs were washed in sterile water. Aliquots of 100 1 of YWCPs were dispensed into 2.0 mL rounded bottom snap top centrifuge tubes, placed in freezer for 1 hour, freeze dried, and stored in a vacuum jar at 4 C for future use.
[0079] EXAMPLE 5: Loading Tumor Lysate into YCWP
[0080] A suspension of fully anhydrous YCWPs (1 X 109) was placed in contact with 50 uL of tumor lysate in PBS (from 200 jigs of tumor tissue) over a period of 2 hours at 4 C, allowing the lysate to penetrate into the hollow insides of the YCWPs to produce loaded YCWPs. The suspension was then freeze dried for 2 hours. After freeze drying, 50 iLtI, of water was added to the loaded YCWPs, incubated for another 2 hours at 4 C and again freeze dried to yield YCWPs with dry tumor lysate within their hollow insides.
The loaded YCWPs were then sterilized by washing in ethanol and maintained in ethanol.
[0081] Figure 4 provides an overview of the YCWPs loading procedure.
[0082] EXAMPLE 6: Loading YCWPs with Tumor Lysate
-14-[0083] A patient tumor biopsy sample was mixed carefully with 50-100 p1 of lysis buffer (PBS) (depending on the amount of the tumor sample), avoiding bubbles during mixing, and was then incubated at 4 C for 30 minutes. The mixture was subjected to freeze-thaw 3 times in acetone-dry ice bath and 37 C water bath, and centrifuged at 4 C for 10 minutes at maximum speed. 50 i.t1 of the prepared tumor lysate was added in a sterile 2 mL centrifuge tube containing 10 mg of dried YCWPs such that the liquid tumor lysate covered the YCWPs. The mixture was incubated at 4 C for 2 hours until the liquid tumor lysate soaked into the YCWPs.
[0084] The tube was then placed into a -85 C freezer for 30 minutes for a quick freeze of the pellet. The tube was placed on freeze drier overnight. 50 111 of sterile water was added onto the dried yeast pellet and incubated at 4 C for 2 hours to allow the liquid to soak into the pellets.
[0085] The tube was placed into a -85 C freezer for 30 minutes for a quick freeze of the pellet. The tube was then placed on freeze drier overnight. The dried particles were then resuspended in 1 mL of 70% ethanol and stored at 4 C for future use.
[0086] EXAMPLE 8: Preparing Dendritic Cells Containing Tumor Lysate Loaded Particles [0087] The tumor lysate loaded YCWPs in 70% ethanol suspension was centrifuged. The ethanol was removed carefully and replaced with 1 mL of PBS. The loaded YCWPs were sonicated. The loaded YCWPs were washed with sterile lx PBS. After final wash, the loaded YCWPs were resuspended in PBS to approximately 1 X 108 particles/100 ittl PBS.
[0088] The loaded YCWPs were added to a dendritic cell culture at a ratio of 1:100, and the culture was returned to 37 C incubator. Subsequently, the following factors were added to the culture: 50itig/mL of TNF-a in sterile water was added to the culture at a ratio of 1:5000 in volume (2 iLtI, per 10 mL of culture); 10 p.g/mL of IL-113 in sterile water was added to the culture at a ratio of 1:1000 in volume; 10 tg/mL of IL-6 in sterile water was added to the culture at a ratio of 1:1000 in volume; and 1 mg/mL of PGE2 in 100% ethanol was added to the culture at a ratio of 1:1000 in volume. After all factors were added and mixed into the culture, the culture was incubated overnight.
[0084] The tube was then placed into a -85 C freezer for 30 minutes for a quick freeze of the pellet. The tube was placed on freeze drier overnight. 50 111 of sterile water was added onto the dried yeast pellet and incubated at 4 C for 2 hours to allow the liquid to soak into the pellets.
[0085] The tube was placed into a -85 C freezer for 30 minutes for a quick freeze of the pellet. The tube was then placed on freeze drier overnight. The dried particles were then resuspended in 1 mL of 70% ethanol and stored at 4 C for future use.
[0086] EXAMPLE 8: Preparing Dendritic Cells Containing Tumor Lysate Loaded Particles [0087] The tumor lysate loaded YCWPs in 70% ethanol suspension was centrifuged. The ethanol was removed carefully and replaced with 1 mL of PBS. The loaded YCWPs were sonicated. The loaded YCWPs were washed with sterile lx PBS. After final wash, the loaded YCWPs were resuspended in PBS to approximately 1 X 108 particles/100 ittl PBS.
[0088] The loaded YCWPs were added to a dendritic cell culture at a ratio of 1:100, and the culture was returned to 37 C incubator. Subsequently, the following factors were added to the culture: 50itig/mL of TNF-a in sterile water was added to the culture at a ratio of 1:5000 in volume (2 iLtI, per 10 mL of culture); 10 p.g/mL of IL-113 in sterile water was added to the culture at a ratio of 1:1000 in volume; 10 tg/mL of IL-6 in sterile water was added to the culture at a ratio of 1:1000 in volume; and 1 mg/mL of PGE2 in 100% ethanol was added to the culture at a ratio of 1:1000 in volume. After all factors were added and mixed into the culture, the culture was incubated overnight.
-15-[0089] EXAMPLE 9: Harvest of Dendritic Cells, Preparation and Cryopresrvation of Vaccine [0090] The dendritic cell culture prepared according to Example 9 was removed from the incubator. The following procedure was performed in a hood under sterile conditions. 10 mL of media were removed from culture flask. The culture flask was rinsed with 4.0-4.5 mL
of IX PBS and also added to the media.
[0091] 1.5-2.0 mL of CcllStripperTM was added to the culture flask. The culture flask was placed in 37 C incubator for 10-20 minutes. About 4 mL of the culture media were added back to the flask from the tube to wash and remove cells. The flask was washed to harvest as many cells as possible. The cells were counted on hemacytometer or CellometerTm. The supernatant was removed after centrifugation.
[0092] Subsequently, the cells were resuspended in CryoStorTM 10 at 5 X 106 cells/mL, aliquoted into cryovials properly labeled with patient ID Number, date and cell concentration at 1.25 X 106 cells/mL per vial (about 250 4). A 250-500 iaL portion was saved in a cryovial for sterility testing, and the remaining vials were stored in Styrofoam containers and placed under -86 C to step down freeze.
[0093] EXAMPLE 10: Preparation of the Solid Tumor Vaccine for Patient Administration [0094] One cryovial of patient's cell was removed from cryostorage and carefully thawed at 37 C in a water bath. Under sterile conditions, 1 mL of sterile saline for injection with 5%
human serum albumin (or 1 mL of sterile 1X PBS) was gently added to the cryovial containing the cells. After the cells were carefully resuspended, the entire volume from the cryovial was drawn and the syringe containing the tumor cells was used for administration of the vaccine to a patient.
[0095] EXAMPLE 11: Dendritic Cells Containing Tumor Lysate Loaded Particles versus antigen pulsed dendritic cells (DCs) [0096] B3Z cells are a T cell hybridoma expressing a T-cell receptor that specifically recognizes the OVA(257_264) (SI1NFEKL) epitopc in the context of H-2Kb and carry a beta-
of IX PBS and also added to the media.
[0091] 1.5-2.0 mL of CcllStripperTM was added to the culture flask. The culture flask was placed in 37 C incubator for 10-20 minutes. About 4 mL of the culture media were added back to the flask from the tube to wash and remove cells. The flask was washed to harvest as many cells as possible. The cells were counted on hemacytometer or CellometerTm. The supernatant was removed after centrifugation.
[0092] Subsequently, the cells were resuspended in CryoStorTM 10 at 5 X 106 cells/mL, aliquoted into cryovials properly labeled with patient ID Number, date and cell concentration at 1.25 X 106 cells/mL per vial (about 250 4). A 250-500 iaL portion was saved in a cryovial for sterility testing, and the remaining vials were stored in Styrofoam containers and placed under -86 C to step down freeze.
[0093] EXAMPLE 10: Preparation of the Solid Tumor Vaccine for Patient Administration [0094] One cryovial of patient's cell was removed from cryostorage and carefully thawed at 37 C in a water bath. Under sterile conditions, 1 mL of sterile saline for injection with 5%
human serum albumin (or 1 mL of sterile 1X PBS) was gently added to the cryovial containing the cells. After the cells were carefully resuspended, the entire volume from the cryovial was drawn and the syringe containing the tumor cells was used for administration of the vaccine to a patient.
[0095] EXAMPLE 11: Dendritic Cells Containing Tumor Lysate Loaded Particles versus antigen pulsed dendritic cells (DCs) [0096] B3Z cells are a T cell hybridoma expressing a T-cell receptor that specifically recognizes the OVA(257_264) (SI1NFEKL) epitopc in the context of H-2Kb and carry a beta-
-16-galactosidase (lacZ) construct driven by a nuclear factor of activated T cells elements from the interleukin 2 promoter (X). These B3Z cells were used to evaluate the effectiveness of dendritic cells pulsed with ovalbumin versus those loaded with ovalbumin by way of ovalbumin loaded YCWPs for antigen presentation, resulting in a CD8+ T cell response.
[0097] Upon activation by interaction with MHC class I molecules on dendritic cells presenting ovalbumin epitopes, the B3Z cells were engineered to respond by expressing p-galactosidase. I3-Galactosidase catalyzes a breakdown of X-gal (5-bromo-4-chloro-indoly1-13-D-galactopyranoside) to yield 5-bromo-4-chloro-3-hydroxyindole, a blue colored product.
Spectroscopic measurement of this blue color gives a measure of the effective MHC class presentation of the ovalbumin epitope. The results of this experiment, shown in Figure 6, demonstrate that loading dendritic cells by ovalbumin loaded YCWPs gave more than a 100 fold increase in CD8+ T cell response over dendritic cells pulsed with ovalbumin.
[0098] EXAMPLE 12: In vitro Data [0099] Dendritic cells were prepared from cells obtained from the bone marrow of the femur and tibia of both hind legs of a female C57BL/6J mouse. Bl6F0 murine melanoma cells were obtained (ATCC (CRL-6322)) and cultured using standard tissue culture techniques. The dendritic cells were loaded with YCWPs containing B 1 6F0 tumor lysate (around 2x10-15 g/YCWP) at a ratio of 100:1 particles:DC by adding the particles at day 7 of a dendritic cell culture for a period of 2 hours. Three days prior to the preparation of the dendritic cells containing tumor lysate loaded particles, female C57BL/6J mice were challenged with 0.75 x 106 B16F0 melanoma cells in 0.4 ml 1X PBS by intravenous injection. Once the dendritic cells containing tumor lysate loaded particles were prepared, each mouse in the treatment group was injected intravenously with 2x106 of dendritic cells containing tumor lysate loaded particles and this vaccination was repeated for three weekly doses. The mice were monitored up to four weeks for pulmonary metastasis.
[0100] At the end of four weeks (when one of the control mice died), the mice were sacrificed and any occurrence of metastases was counted. All four control animals that were not treated with dendritic cells containing tumor lysate loaded particles had more than 50 tumors. However, none of the treated animals had measurable metastases.
This data
[0097] Upon activation by interaction with MHC class I molecules on dendritic cells presenting ovalbumin epitopes, the B3Z cells were engineered to respond by expressing p-galactosidase. I3-Galactosidase catalyzes a breakdown of X-gal (5-bromo-4-chloro-indoly1-13-D-galactopyranoside) to yield 5-bromo-4-chloro-3-hydroxyindole, a blue colored product.
Spectroscopic measurement of this blue color gives a measure of the effective MHC class presentation of the ovalbumin epitope. The results of this experiment, shown in Figure 6, demonstrate that loading dendritic cells by ovalbumin loaded YCWPs gave more than a 100 fold increase in CD8+ T cell response over dendritic cells pulsed with ovalbumin.
[0098] EXAMPLE 12: In vitro Data [0099] Dendritic cells were prepared from cells obtained from the bone marrow of the femur and tibia of both hind legs of a female C57BL/6J mouse. Bl6F0 murine melanoma cells were obtained (ATCC (CRL-6322)) and cultured using standard tissue culture techniques. The dendritic cells were loaded with YCWPs containing B 1 6F0 tumor lysate (around 2x10-15 g/YCWP) at a ratio of 100:1 particles:DC by adding the particles at day 7 of a dendritic cell culture for a period of 2 hours. Three days prior to the preparation of the dendritic cells containing tumor lysate loaded particles, female C57BL/6J mice were challenged with 0.75 x 106 B16F0 melanoma cells in 0.4 ml 1X PBS by intravenous injection. Once the dendritic cells containing tumor lysate loaded particles were prepared, each mouse in the treatment group was injected intravenously with 2x106 of dendritic cells containing tumor lysate loaded particles and this vaccination was repeated for three weekly doses. The mice were monitored up to four weeks for pulmonary metastasis.
[0100] At the end of four weeks (when one of the control mice died), the mice were sacrificed and any occurrence of metastases was counted. All four control animals that were not treated with dendritic cells containing tumor lysate loaded particles had more than 50 tumors. However, none of the treated animals had measurable metastases.
This data
-17-indicates that dendritic cells containing tumor lysate loaded particles is effective in treating cancer in a proven animal model system. The data are compiled in Table 1.
[0101] Table 1. Number of Metastases in Control and Treated Mice Number of Metastases Group (including tumors at non-lung sites) Control:
A >50 >50 >50 >50 Treated:
[0102] Moreover, Figure 7A shows the lungs of three of the control mice (one mouse died prior to the end of the experiment and the lungs were not able to be photographed) in this experiment and Figure 7B shows the lungs of the four treated mice.
[0103] EXAMPLE 13: In vivo Procedure [0104] To vaccinate a subject, a dose of 1.25 million dendritic cells containing tumor lysate loaded particles can be cryopreserved in 0.2 mL of a serum-free, 10% dimethyl sulfoxide freezing medium (CryoStorlm CS-10, BioLife Solutinos, Inc.). Before injection, the dendritic
[0101] Table 1. Number of Metastases in Control and Treated Mice Number of Metastases Group (including tumors at non-lung sites) Control:
A >50 >50 >50 >50 Treated:
[0102] Moreover, Figure 7A shows the lungs of three of the control mice (one mouse died prior to the end of the experiment and the lungs were not able to be photographed) in this experiment and Figure 7B shows the lungs of the four treated mice.
[0103] EXAMPLE 13: In vivo Procedure [0104] To vaccinate a subject, a dose of 1.25 million dendritic cells containing tumor lysate loaded particles can be cryopreserved in 0.2 mL of a serum-free, 10% dimethyl sulfoxide freezing medium (CryoStorlm CS-10, BioLife Solutinos, Inc.). Before injection, the dendritic
-18-cells can be thawed and diluted to a 1 mL with sterile saline for injection containing 5%
human serum albumin (Albuminar -25, Aventis Behring). The dilution can then be transferred to a 3.0 cc syringe for injection and using a needle no smaller than 23 gauge, which should be administered within 2 hours of the thawing. The injection can be administered subcutaneously into an area of lymph nodes.
[0105] EXAMPLE 14: Isolation of Mononuclear Cells from Whole Peripheral Blood using the SepMate-50 System Procedure:
STEP PROCEDURE/WORK INSTRUCTIONS
1 Add 15mL of lymphocyte separation medium (LSM) to each SepMate tube by carefully, yet quickly, pipetting it through the central hole of each tube insert.
2 Pool the whole blood.
3 Dilute the whole blood sample with twice the initial blood volume of 1xPBS
4 Add 30 mL diluted blood to the Sepmate tubes.
Centrifuge for 10-15 minutes at room temperature.
6 Pour off the top layer containing the enriched PBMC's from each Sepmate tube into new centrifuge tubes.
7 Cap tubes and centrifuge 5 minutes.
8 Resuspend pellet in each tube with up to 1.0 mL ACK lysing buffer with pipette. Repeat cycles of adding 1X PBS to resuspend pellet and centrifuge.
9 Decant the supernatant, and aliquot 50 x 106 cells suspended in 15 mL RPMI media per flask. Place in the CO2 incubator at 37 C for 1-1.5 hours.
Remove flasks from incubator. Wash pellet with 1X PBS.
11 add 15 mL complete DC Media (containing IL-4, GM-CSF, and
human serum albumin (Albuminar -25, Aventis Behring). The dilution can then be transferred to a 3.0 cc syringe for injection and using a needle no smaller than 23 gauge, which should be administered within 2 hours of the thawing. The injection can be administered subcutaneously into an area of lymph nodes.
[0105] EXAMPLE 14: Isolation of Mononuclear Cells from Whole Peripheral Blood using the SepMate-50 System Procedure:
STEP PROCEDURE/WORK INSTRUCTIONS
1 Add 15mL of lymphocyte separation medium (LSM) to each SepMate tube by carefully, yet quickly, pipetting it through the central hole of each tube insert.
2 Pool the whole blood.
3 Dilute the whole blood sample with twice the initial blood volume of 1xPBS
4 Add 30 mL diluted blood to the Sepmate tubes.
Centrifuge for 10-15 minutes at room temperature.
6 Pour off the top layer containing the enriched PBMC's from each Sepmate tube into new centrifuge tubes.
7 Cap tubes and centrifuge 5 minutes.
8 Resuspend pellet in each tube with up to 1.0 mL ACK lysing buffer with pipette. Repeat cycles of adding 1X PBS to resuspend pellet and centrifuge.
9 Decant the supernatant, and aliquot 50 x 106 cells suspended in 15 mL RPMI media per flask. Place in the CO2 incubator at 37 C for 1-1.5 hours.
Remove flasks from incubator. Wash pellet with 1X PBS.
11 add 15 mL complete DC Media (containing IL-4, GM-CSF, and
-19-Gentamycin) and place in the 37 CO2 incubator for 22-24 hours.
12 On Day 2, continue with inoculation of cultures with YWCP's and cytokines after the dendritic cells have incubated at 37 C for approx.
22 hours.
[0106] EXAMPLE 15: Generation of Dendritic Cells Combined with Loaded YCWP's [0107] Following the procedure in Example 14, the following methods are performed:
I. Addition of YCWP's STEP PROCEDURE/WORK INSTRUCTIONS
To each dendritic cell culture flask, add a sufficient volume of tumor lysate infused YCWP's at a ratio of 1:100. (50-200u1) and incubate for 1-2 hours.
II. Preparation And Addition of Cytokines STEP PROCEDURE/WORK INSTRUCTIONS
1 Add TNF-a , 113, IL-6 and PGE2 to each culture flask, [0108] EXAMPLE 16: Harvest of Cells, Preparation and Cryopreservation of Vaccine [0109] Following the procedure in Example 15, the following methods are performed:
Harvest of cells:
STEP PROCEDURE/WORK INSTRUCTIONS
Add 4.0-4.5 mL 1xPBS to each flask containing 10 mL media.
2 Add 1.5 -2.0 mL CellStripperTM to each flask to release mature cells and incubate at 37C.
3 Centrifuge and emove supernatant by decanting until 'dry' pellet remains.
12 On Day 2, continue with inoculation of cultures with YWCP's and cytokines after the dendritic cells have incubated at 37 C for approx.
22 hours.
[0106] EXAMPLE 15: Generation of Dendritic Cells Combined with Loaded YCWP's [0107] Following the procedure in Example 14, the following methods are performed:
I. Addition of YCWP's STEP PROCEDURE/WORK INSTRUCTIONS
To each dendritic cell culture flask, add a sufficient volume of tumor lysate infused YCWP's at a ratio of 1:100. (50-200u1) and incubate for 1-2 hours.
II. Preparation And Addition of Cytokines STEP PROCEDURE/WORK INSTRUCTIONS
1 Add TNF-a , 113, IL-6 and PGE2 to each culture flask, [0108] EXAMPLE 16: Harvest of Cells, Preparation and Cryopreservation of Vaccine [0109] Following the procedure in Example 15, the following methods are performed:
Harvest of cells:
STEP PROCEDURE/WORK INSTRUCTIONS
Add 4.0-4.5 mL 1xPBS to each flask containing 10 mL media.
2 Add 1.5 -2.0 mL CellStripperTM to each flask to release mature cells and incubate at 37C.
3 Centrifuge and emove supernatant by decanting until 'dry' pellet remains.
-20-II. Preparation of Vaccine and Cryopreservation:
STEP PROCEDURE/WORK INSTRUCTIONS
Resuspend cells in CryoStorTM 10, aliquot and step down freeze.
STEP PROCEDURE/WORK INSTRUCTIONS
Resuspend cells in CryoStorTM 10, aliquot and step down freeze.
-21-
Claims (54)
1. An isolated dendritic cell comprising a phagocytosed component consisting of (i) yeast cell wall particle and (ii) a tumor lysate loaded within the yeast cell wall particle, wherein the loaded yeast cell wall particle was prepared by freeze-drying the tumor lysate with the yeast cell wall particle to entrap the tumor lysate.
2. The isolated dendritic cell of claim 1, wherein the tumor lysate is present in an amount from about 200 [tg to about 500 [tg.
3. The isolated dendritic cell of claim 1, wherein the tumor lysate is present in an amount of about 200 mg.
4. The isolated dendritic cell of claim 1, wherein the tumor lysate is a lysate from a cancer which is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
5. The isolated dendritic cell of claim 1, wherein the isolated dendritic cell is an immature cell that has been isolated for no more than 8 days.
6. A vaccine comprising the isolated dendritic cell of claim 1.
7. A method for producing an isolated dendritic cell containing a tumor lysate loaded yeast cell wall particle comprising:
loading the tumor lysate into the yeast cell wall particle to produce the tumor lysate loaded particle;
(ii) freeze-drying the tumor lysate loaded yeast cell wall particle; and (iii) incubating the tumor lysate loaded yeast cell wall particle with a dendritic cell, wherein the incubating causes the dendritic cell to phagocytose the tumor lysate loaded particle.
Date Recue/Date Received 2021-07-29
loading the tumor lysate into the yeast cell wall particle to produce the tumor lysate loaded particle;
(ii) freeze-drying the tumor lysate loaded yeast cell wall particle; and (iii) incubating the tumor lysate loaded yeast cell wall particle with a dendritic cell, wherein the incubating causes the dendritic cell to phagocytose the tumor lysate loaded particle.
Date Recue/Date Received 2021-07-29
8. The method of claim 7, further comprising (a) resuspending the tumor lysate loaded yeast cell wall particle in solution and (b) freeze-drying the resuspended solution before step (iii) and after step (ii).
9. The method of claim 7, wherein the tumor lysate is produced by freezing and thawing the tumor.
10. The method of claim 9, further comprising repeating the freezing and thawing steps.
11. The method of claim 10, further comprising cryopreserving the tumor lysate at -150 C.
12. The method of claim 7, wherein step (i) comprises: (a) adding tumor lysate into a yeast cell wall particle, (b) incubating the yeast cell wall particle, (c) freeze-drying the yeast cell wall particle and (d) washing the yeast cell wall particle, wherein steps (b)-(c) are repeated at least once with a step of adding water into the yeast cell particle before step (b) is repeated.
13. The method of claim 7, wherein step (iii) comprises: (a) contacting the tumor lysate loaded particle and the dendritic cell at a ratio of about 100:1, (b) incubating the tumor lysate loaded particle with the dendritic cell for 1 to 2 hours and (c) collecting the dendritic cell and washing the cell.
14. The method of claim 7, wherein about 200 [tg to about 500 [tg tumor lysate is present in about 109 yeast cell wall particles.
15. A use of a vaccine comprising the isolated dendritic cell of claim 1, for treating cancer in a patient in need thereof, wherein the tumor lysate is from the same type of cancer that is being treated.
16. A use of a vaccine comprising the isolated dendritic call of claim 1, for the preparation of a medicament for treating cancer in a patient in need thereof, wherein the tumor lysate is from the same type of cancer that is being treated.
Date Recue/Date Received 2021-07-29
Date Recue/Date Received 2021-07-29
17. The use of claims 15, wherein the cancer is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
18. The use of claims 16, wherein the cancer is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
19. Isolated dendritic cells comprising phagocytosed components consisting essentially of (i) yeast cell wall particles and (ii) tumor lysate loaded within the yeast cell wall particles, wherein about 200 pg to about 500 pg tumor lysate is present in about 109 yeast cell wall particles.
20. The isolated dendritic cells of claim 19, wherein about 200 pg tumor lysate is present in about 109 yeast cell wall particles.
21. The isolated dendritic cells of claim 19, wherein the tumor lysate is a lysate of a cancer which is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
22. The isolated dendritic cells of claim 19, wherein the dendritic cell is an immature cell that has been isolated for no more than 8 days prior to contacting the tumor lysate loaded yeast cell wall particle.
23. A vaccine comprising the isolated dendritic cells of claim 19.
24. A use of a vaccine comprising the isolated dendritic cells of claim 19, for treating cancer in a patient in need thereof, wherein the tumor lysate is from the same type of cancer that is being treated.
Date Recue/Date Received 2021-07-29
Date Recue/Date Received 2021-07-29
25. The use of claim 24, wherein the cancer is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
26. A use of a vaccine comprising the isolated dendritic cells of claim 19, for the preparation of a medicament for treating cancer in a patient in need thereof, wherein the tumor lysate is from the same type of cancer that is being treated.
27. The use of claim 26, wherein the cancer is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
28. A composition comprising a yeast cell wall particle and a tumor lysate, wherein about 200 pg to about 500 lig tumor lysate is loaded within about 109 yeast cell wall particles.
29. The composition of claim 28, wherein the yeast cell wall particle is about 0.5 pm to about 5 pm in size.
30. The composition of claim 28, wherein the tumor lysate is present in an amount of about 200 pg.
31. The composition of claim 28, wherein the tumor lysate is a lysate of a cancer which is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
32. The composition of claim 28, further comprising a dendritic cell, wherein the tumor lysate loaded particle is phagocytosed by the dendritic cell.
Date Recue/Date Received 2021-07-29
Date Recue/Date Received 2021-07-29
33. The composition of claim 32, wherein the dendritic cell is an immature cell that has been isolated for no more than 8 days.
34. A method for producing a vaccine comprising the composition of any one of claim 28-33 comprising:
(i) contacting the yeast cell wall particle with the tumor lysate; and (ii) freeze drying the tumor lysate and the yeast cell wall particle to produce the tumor lysate loaded yeast cell wall particle, wherein about 200 lag to about 500 lag tumor lysate is loaded within about 109yeast cell wall particles.
(i) contacting the yeast cell wall particle with the tumor lysate; and (ii) freeze drying the tumor lysate and the yeast cell wall particle to produce the tumor lysate loaded yeast cell wall particle, wherein about 200 lag to about 500 lag tumor lysate is loaded within about 109yeast cell wall particles.
35. The method of claim 34, further comprising (iii) resuspending the freeze-dried yeast cell wall particle of (ii); and (iv) freeze-drying the resuspended solution.
36. The method of claim 34, further comprising incubating the tumor lysate loaded particle with a dendritic cell such that the cell phagocytoses the particle.
37. The method of claim 36, further comprising cryopreserving the dendritic cell comprising the phagocytosed loaded particle.
38. The method of claim 34, wherein step (i) further comprises: (a) adding tumor lysate to the yeast cell wall particle, (b) incubating the yeast cell wall particle, (c) freeze-drying the yeast cell wall particle and (d) washing the yeast cell wall particle, wherein steps (b)-(c) are repeated at least once with a step of adding water into the yeast cell particle before step (b) is repeated.
39. The method of claim 36, wherein the tumor lysate loaded particle and the dendritic cell are incubated in a ratio of about 100:1 for 1 to 2 hours, followed by collecting and washing of the dendritic cell.
40. A use of the composition of claim 28, for treating cancer in a patient in need thereof, wherein the tumor lysate is from the same type of cancer that is being treated.
Date Recue/Date Received 2021-07-29
Date Recue/Date Received 2021-07-29
41. The use of claim 40, wherein the cancer is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumor, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
42. A use of the composition of claim 28, for the preparation of a medicament for treating cancer in a patient in need thereof, wherein the tumor lysate is from the same type of cancer that is being treated.
43. The use of claim 42, wherein the cancer is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumor, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
44. A method for producing a tumor lysate loaded particle comprising:
(i) contacting a suspension of yeast cell wall particles (YCWPs) with a tumor lysate, wherein contacting the suspension comprises:
(a) incubating the suspension of YCWPs with the tumor lysate, (b) freeze-drying the suspension of YCWPs, and (c) washing the YCWPs, wherein steps (a)-(b) are repeated at least once with a step of adding water into the yeast cell particle before step (a) is repeated; and (ii) freeze-drying the suspension of YCWPs and the tumor lysate to produce a tumor lysate loaded particle.
(i) contacting a suspension of yeast cell wall particles (YCWPs) with a tumor lysate, wherein contacting the suspension comprises:
(a) incubating the suspension of YCWPs with the tumor lysate, (b) freeze-drying the suspension of YCWPs, and (c) washing the YCWPs, wherein steps (a)-(b) are repeated at least once with a step of adding water into the yeast cell particle before step (a) is repeated; and (ii) freeze-drying the suspension of YCWPs and the tumor lysate to produce a tumor lysate loaded particle.
45. The method of claim 44, the tumor lysate is a lysate of a cancer which is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
46. A vaccine comprising the tumor lysate loaded particle produced by the method of claim 44.
Date Recue/Date Received 2021-07-29
Date Recue/Date Received 2021-07-29
47. The vaccine of claim 46, further comprising a CpG oligonucleotide.
48. The vaccine of claim 46, further comprising a tetanus toxoid MEC class II-binding p30 peptide.
49. The vaccine of claim 46, further comprising a dendritic cell.
50. The vaccine of claim 49, wherein the tumor lysate loaded particle is phagocytosed by the dendritic cell.
51. A use of the vaccine of claim 46, for treating cancer in a patient in need thereof, wherein the tumor lysate is from the same type of cancer that is being treated.
52. The use of claim 51, wherein the cancer is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
53. Use of the vaccine of claim 46, for the preparation of a medicament for treating cancer in a patient in need thereof, wherein the tumor lysate is from the same type of cancer that is being treated.
54. The use of claim 53, wherein the cancer is breast cancer, small cell lung cancer, non-small cell lung cancer, glioma, medulloblastoma, neuroblastoma, Wilms tumors, rhabdomyosarcoma, osteosarcoma, liver cancer, pancreatic cancer, melanoma, prostate cancer or ocular melanoma.
Date Recue/Date Received 2021-07-29
Date Recue/Date Received 2021-07-29
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/019,007 US20140065173A1 (en) | 2012-09-06 | 2013-09-05 | Tumor lysate loaded particles |
| US14/019,025 | 2013-09-05 | ||
| US14/019,007 | 2013-09-05 | ||
| US14/019,025 US9744193B2 (en) | 2012-09-06 | 2013-09-05 | Tumor lysate loaded particles |
| PCT/US2013/063091 WO2014040089A1 (en) | 2012-09-06 | 2013-10-02 | Tumor lysate loaded particles |
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| AU2002225681A1 (en) * | 2000-11-15 | 2002-05-27 | Globe Immune, Inc. | Yeast-dentritic cell vaccines and uses thereof |
| WO2011053331A1 (en) * | 2009-11-02 | 2011-05-05 | Orbis Health Solutions Llc | Vaccine compositions and methods of use |
| ES2614181T3 (en) * | 2010-08-14 | 2017-05-30 | University Of Massachusetts | Yeast cell wall particle for delivery of nanoparticles addressed to the receiver |
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