WO2002016560A1 - Verfahren zur herstellung gebrauchsfertiger, antigenbeladener oder -unbeladener, kryokonservierter, reifer dendritischer zellen - Google Patents
Verfahren zur herstellung gebrauchsfertiger, antigenbeladener oder -unbeladener, kryokonservierter, reifer dendritischer zellen Download PDFInfo
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- WO2002016560A1 WO2002016560A1 PCT/EP2001/009790 EP0109790W WO0216560A1 WO 2002016560 A1 WO2002016560 A1 WO 2002016560A1 EP 0109790 W EP0109790 W EP 0109790W WO 0216560 A1 WO0216560 A1 WO 0216560A1
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- cells
- antigen
- freezing
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- immature
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Definitions
- the present invention relates to a process for the production of ready-to-use, cryopreserved, mature dendritic cells, in particular for the production of a vaccine which contains these dendritic cells, in which immature dendritic cells are cultivated in the presence of suitable maturation stimuli and the mature dendritic cells obtained in this way are frozen. Before or after freezing, the dendritic cells can be loaded with antigen.
- the invention also relates to a vaccine obtainable by the method according to the invention and a composition containing frozen, mature, antigen-loaded dendritic cells.
- DC Dendritic cells
- DZ Dendritic cells
- T-cell stimulatory mode T-cell stimulatory mode
- DC which was isolated from tissue or blood and was loaded with antigen in vitro, was immunogenic as a mature DC in vivo after back injection. It has recently been shown that DC can induce CD4 + and CD8 + T cell immunity both in healthy people and in cancer patients. In immunocompetent, healthy individuals, a single booster injection with mature DC not only increased the frequency but also the functional avidity of the CD8 + T cell response. For these reasons are (especially mature) DCs currently very promising adjuvants for eliciting potent T cell responses to tumors and infections in humans.
- DC fetal calf serum
- GM-CSF + IL-4 fetal calf serum
- Frozen PBMC also have the disadvantage that after thawing, the cells have to be cultivated for several days in order to differentiate them in DC.
- the freezing of immature dendritic cells produced by means of GM-CSF and IL-4 from monocytes is also disclosed in WO 99/46984.
- An object of the present invention is therefore to provide a composition such as. B. Provide a vaccine containing mature DC over a longer period Can be kept without significant loss of activity and at
- Need can be administered within a short time.
- the DCs used according to the invention preferably originate from the patient who is treated with the vaccine (autologous).
- the DC can also come from other patients (ailogen), e.g. B. from Leukapheresaten by normal volunteers, such as. B. in Thurner et al. (1999) J. Immunol. Methods 283, 1-15.
- mature DC only fully mature DC (hereinafter also referred to as “mature DC” for short), which can be obtained by culturing in the presence of a suitable "ripening cocktail” with specific maturation stimuli, survive to a high percentage after freezing without FCS and thawing and have immunostimulatory activities that are comparable to those of freshly prepared, mature DC.
- a suitable "ripening cocktail” with specific maturation stimuli, survive to a high percentage after freezing without FCS and thawing and have immunostimulatory activities that are comparable to those of freshly prepared, mature DC.
- the immature DC When cultivating with the ripening cocktail, the immature DC is differentiated into mature DC.
- a particularly preferred ripening cocktail contains interleukin- ⁇ (IL- ⁇ ), interleukin-6 (IL-6), prostaglandin E 2 (PGE 2 ) and "tumor necrosis factor ⁇ " TNF ⁇ .
- the present invention thus relates
- a method for producing ready-to-use, cryopreserved, mature dendritic cells comprising a) providing immature dendritic cells (DC); b) Culturing the immature DC in a culture medium containing a ripening cocktail with one or more ripening stimuli under
- a method for finding advantageous conditions for freezing DC comprising the steps of: a) providing immature DC; b) culturing different approaches of immature DC in the presence of different maturation stimuli; c) subsequently culturing the DC in medium with or without cytokines, cultivation without cytokines being preferred; d) determining the proportion of living cells after at least 1 day of culture in the medium with or without cytokines; and e) determining the maturation stimulus that gave the highest survival rate.
- immature DC are first cultivated, a suitable ripening cocktail with one or more ripening stimuli being added to the culture medium.
- Suitable maturation stimuli are IL-1 such as e.g. B. IL-lß etc., IL-6, TNF- ⁇ , prostglandins such as e.g. B. PGE 2 etc., IFIM- ⁇ , lipopolysaccharides and other bacterial cell products such as.
- B. MPL monophosphoryl lipid A
- lipoteichoic acid, etc. phosphorylcholine
- calcium ionophores phorbol esters
- phorbol esters such as PMA
- heat shock proteins nucleotides such as. B.
- the culture medium or the ripening cocktail contains IL-1ß, IL-6, PGE 2 and TNF ⁇ or the maturation cocktail is monocyte-conditioned medium (MCM) or MCM with additional PGE 2 .
- the DC can be loaded with antigen during or after the cultivation step. After maturation and, if necessary, loading with antigen, the DC are frozen in freezing medium which does not contain heterologous serum such as e.g. B.
- FCS contains.
- heterologous serum is serum that does not originate from the human species. According to the invention, however, it is possible to use both autologous serum or plasma (which comes from the same person as the DC) and allogeneic serum or plasma (which comes from a different person than the DC).
- Immature DC in the sense of this application are CD83 (and / or p55 / fascin- and / or DC-LAMP-) negative (or only weak and / or too little positive), compared to mature DC only small amounts of class I - and class II MHC and adhesion or costimulatory molecules (eg in particular CD86, CD80, CD40) expressing leukocytes which differentiate into mature DC after a suitable maturation stimulus.
- Mature DC in the sense of this application are leukocytes which develop from immature DC after the action of a maturation stimulus, an increased expression of CD83 (and / or p55 / fascin and / or DC-LAMP) and of class dog class I Show MHC molecules and adhesion or costimulatory molecules, in particular of CD86, CD80, CD40. Furthermore, the mature DC show a clearly increased T-cell stimulatory capacity in comparison to immature DC (eg, in contrast to immature DC, they show a clear stimulatory activity in the allogeneic MLR even with a DC: T ratio ⁇ 1: 100); in addition, a characteristic of the mature DC in the sense of this application is that these DC are stable, i. H.
- DCs that are not fully developed are not stable and differentiate from immature DCs or z.
- the immature DC can be provided from various known sources.
- the progenitor cells of immature DC are usually non-proliferating CD14-positive mononuclear cells (PBMC; monocytes) or proliferating CD34-positive cells.
- PBMC can be isolated from leukapheresis products.
- the PBMC can be differentiated into immature DC as described (Thurner et al. (1999) J. Exp. Med. 190, 1669). For this, the PBMC are cultivated in the presence of IL-4 (or IL-13; Romani et al. (1996) J. Immunol.
- Immature DC can also be produced from CD14-positive monocytes by cultivation in the presence of GM-CSF and IFN ⁇ (Santini et al. (2000) J. Exp. Med. 191, 1777-1788).
- CD34-positive cells can be cultivated in the presence of GM-CSF, SCF (stem cell factor) and TNF. mature DC can be obtained.
- the immature dendritic cells can also be obtained directly from fresh blood, e.g. B. Nestle et al. (1998) Nat. Med. 4, 328.
- CDllc + and CDllc-DC also exist in the blood.
- M-DC8-DC Schott al. (1999) Pathobiology 67, 287-290
- These DCs can also be isolated from the blood and used further in the method according to the invention.
- the preferred concentrations of the various maturation stimuli in the culture medium are in the range from 0.1 ng / ml to 100 ⁇ g / ml, preferably 1 ng / ml to 10 ⁇ g / ml.
- the concentration of the ripening stimuli is 0.1 to 100 ng / ml IL-1, 0.1 to 100 ng / ml IL-6, 0.1 to 10 ⁇ g / ml PGE 2 and 0, 1 to 100 ng / ml TNF ⁇ (most preferably, the concentration of these specific maturation stimuli is approximately 10 ng / ml IL-lß, 10 ng / ml IL-6, 1 ⁇ g / ml PGE 2 and 10 ng / ml TNF ⁇ ).
- the concentrations relate to the final concentrations of the substances in the cell culture medium in which the DC are cultivated.
- One way to mature the DC in the presence of the active substances mentioned is to cultivate the immature DC in the presence of monocyte-conditioned medium (MCM).
- MCM contains IL- ⁇ , IL-6, PGE 2 and TNF ⁇ . It can be obtained by culturing PBMC in medium without cytokines, as described for example in Romani et al. (1996) J. Immunol. Methods 196, 137.
- MCM monocyte-conditioned medium
- the culture medium contains 1-100%, preferably 5-25% MCM.
- the DC is matured by adding MCM and a defined amount of PGE 2 .
- maturing times 6 to 96 hours, preferably 18 to 36 hours (in the case of using leucopharesis as the starting material) or for 36 to 60 hours (when using fresh blood or buffy as the starting material) ,
- the DCs are loaded with at least one antigen or an antigen-antibody complex during and / or after said ripening step.
- the antigen loading can take place before or after freezing. If it occurs after freezing, the DCs are only loaded with antigen after thawing. However, loading with antigen is preferred before freezing the DC. This has the advantage that the DC are ready for use immediately after thawing.
- Antigens in the sense of this application are proteins, protein fragments, peptides and molecules derived therefrom (e.g. glycosified compounds or compounds with other chemical modifications), but also the nucleic acid coding for them, viruses, whole pro- or eukaryotic cells or fragments thereof or apoptotic cells.
- “Loading by antigen” is understood to mean a process which leads to MHC molecules "presenting" on the cell surface of the DC peptides, ie having a complex with the MHC molecules. While the MHC molecules can be loaded directly using specific peptides, protein (fragment) s must first be processed, i.e. first taken up by the cell.
- MHCII-peptide complexes are presented on the cell surface.
- proteins or protein fragments come into consideration as antigens.
- the proteins can be of native origin or have been produced recombinantly.
- the maturation and loading with protein antigen results in the DC MHCII-peptide complexes on the cell surface, which comprise peptide fragments of the added antigen.
- the concentration of the protein antigen in the culture medium is usually 0.1 to 100 ⁇ g / ml, preferably 1 to 50 ⁇ g / ml, most preferably 1 to 10 ⁇ g / ml.
- the loading should preferably take place during the maturation of the DC. Then a particularly effective presentation of the antigen fragments by MHCII molecules takes place.
- the protein (fragment) need not be present throughout the ripening period, but both the ripening composition and the protein (fragment) should be present at least for part of the ripening period.
- protein antigens examples include KLH (keyhole limpet hemocyanin) as a widely used positive control antigen, MAGE-3 protein as an example of a tumor antigen, and hepatitis B surface antigen (HbsAg) or HIV-1 gp 160 protein as an example of a protein useful for the treatment of viral diseases.
- KLH keyhole limpet hemocyanin
- MAGE-3 protein as an example of a tumor antigen
- HbsAg hepatitis B surface antigen
- HIV-1 gp 160 protein examples include HIV-1 gp 160 protein useful for the treatment of viral diseases.
- short polypeptides or protein fragments (e.g. short polypeptides with up to 50 amino acid residues that fit exactly into the MHC molecules on the DC surface)
- a loading after the Maturation possible namely before freezing or after thawing.
- the short polypeptides are added to washed TLC.
- a further possibility for loading with antigen is the addition of apoptotic or lysed cells to the culture medium.
- the cells added can then be phagocytized by the DC.
- This method has the advantage that in addition to MHC class II molecules, class I molecules are also loaded effectively. It was shown, for example, that even when proteins (especially particulate nature) are administered, presentation also takes place on MHC class I molecules.
- DC fragments from necrotic cells or apoptotic tumor cells
- DC z. B. can also be loaded with antigen DC that DC z. B. be fused with tumor cells.
- a fusion can be achieved by means of polyethylene glycol or electroporation.
- the DC are loaded with antigen by transfecting or virally infecting them.
- nucleic acids coding for antigens are introduced into the DC and brought to expression.
- DNA or RNA transfection or infection with adenoviruses can be carried out in a suitable manner.
- This also makes it possible to load the MHC class I molecules.
- RNA prepared from tumor cells can also be transfected. Common methods such as e.g. B. electroporation can be used.
- specific antigen peptide may be added during or after the ripening period to directly load Class I or II MHC molecules.
- the peptide antigen can be added to the cells before the ripening composition, but is preferably added simultaneously or afterwards.
- the antigen loading is preferably carried out for at least 10 minutes, more preferably for 1 to 24 hours, most preferably for 3 to 12 hours.
- the peptides typically have at least 8 amino acids. Such peptides preferably have 8 to 12 amino acids (MHCI) or 8 to 25 amino acids (MHCII).
- the concentration of the peptide in the culture medium for loading is generally 0.01 to 1000 ⁇ M, preferably 0.1 to 100 ⁇ M, most preferably 1 to 20 ⁇ M.
- peptides that can be presented by MHC molecules are conceivable as usable peptides.
- Peptides derived from proteins derived from pathogens are preferred. These can also be peptides that have variations in the naturally occurring amino acid sequence. Such variations are usually one or two amino acid changes.
- Examples of peptide antigens are the influenza matrix peptide (IMP) with the amino acid sequence GILGFVFTL (SEQ ID NO: 1) or the melan A-analogous peptide with the sequence ELAGIGILTV (SEQ ID NO: 2). Examples of other possible peptides are shown in FIG. 26.
- IMP influenza matrix peptide
- GILGFVFTL amino acid sequence GILGFVFTL
- melan A-analogous peptide melan A-analogous peptide with the sequence ELAGIGILTV
- FIG. 26 examples of other possible peptides are shown in FIG. 26.
- peptide / protein pulsing can also be carried out in order to load DC with
- the DC can also be loaded with antigen-antibody complexes.
- Suitable antigens for this are all the antigens mentioned above.
- Antigen-antibody complexes in the sense of the present invention are complexes of these antigens with suitable antibodies, e.g. B. antigen-IgG or IgE complexes.
- suitable antibodies e.g. B. antigen-IgG or IgE complexes.
- the loading of DC with such antigens is described in Reynault, A. et al., 3rd Exp. Med. 189 (2): 371-80 (1999), to which express reference is made here.
- the mature DC can be frozen in freezing medium.
- the freezing medium can also contain one or more antifreezing agents (for example from 0.1 to 35% (v / v), preferably 5 to 25% (v / v)).
- Suitable antifreeze agents are preferably the following compounds: DMSO, glycerol, polyvinyl pyrrolidone, polyethylene glycol, albumin, choline chloride, amino acids, methanol, acetamide, glycerol monoacetate, inorganic salts etc.
- the preferred antifreeze agent is DMSO, which is preferably in a concentration of 5 to 25% (v / v), more preferably 10 to 20% (v / v), most preferably about 10% DMSO is contained in the freezing medium.
- the freezing medium can contain a non-heterologous serum component, preferably in a concentration of 2 to 90% (w / v), preferably 5 to 80% (w / v), with human serum albumin, preferably in a concentration of 10 to 30% (w / v) is particularly preferred.
- the freezing medium contains autologous serum or plasma instead of human serum albumin. It can also contain human, allogeneic or pool serum.
- One or more carbohydrate-derived polyol compounds may also be present in the freezing medium as an additive. preferably at a concentration of 2 to 30%, more preferably 5 to 10%, most preferably about 5% (w / v).
- the most preferred freezing medium is pure autologous serum with approximately 10% DMSO and approximately 5% glucose. Usually the cells are centrifuged before freezing in order to concentrate them and take them up in the freezing medium.
- the preferred concentration of cells in the freezing medium is 1 to 100 x 10 6 cells / ml, the most preferred concentration is approximately 5 x 10 6 cells / ml to 20 x 10 6 cells / ml.
- the survival rate of DC is increased when the DC is contacted with an anti-apoptotic molecule before freezing or after thawing.
- the DC are therefore brought into contact with a molecule which can inhibit apoptosis before freezing or after thawing.
- Preferred anti-apoptotic molecules are CD40 ligand (CD40L) (Morris et al. (1999) J. Biol. Chem. 274, 418), TRANCE (Wong et al. (1997) J. Exp. Med. 186, 2075) or RANKL (Anderson et al. (1997) Nature 390, 175).
- one of the molecules before freezing or after thawing 'of DC is at least at least 10 min, preferably at least 1 hour preferably at least four hours the culture medium was added.
- Preferred concentrations in the culture medium are 1 ng / ml to 5 ⁇ g / ml (RA KL / TRANCE) or 1 ng / ml to 1 ⁇ g / ml (CD40L).
- Particularly preferred concentrations are 0.5 to 1 ⁇ g / ml (RANKL / TRANCE) and 0.1 to 0.5 ⁇ g / ml (CD40L).
- the DC are furthermore in the presence of the immunosuppressive interleukin-10 (IL-10) or other immune / maturation modulators such as e.g. B. vitamin D3 and its derivatives, fumaric acid and derivatives thereof such as. B. esters, etc., mycophenolate mofetil, etc. cultivated.
- IL-10 immunosuppressive interleukin-10
- other immune / maturation modulators such as e.g. B. vitamin D3 and its derivatives, fumaric acid and derivatives thereof such as. B. esters, etc., mycophenolate mofetil, etc. cultivated.
- Cells treated in this way are not used to stimulate the immune system; rather, tolerance to certain antigens is to be induced.
- the concentration of these modulators and of IL-10 in the medium is 1 - 1000 ng / ml, preferably 10 - 100 ng / ml.
- the present invention also relates to a vaccine which can be obtained by the method according to the invention.
- the vaccine according to the invention can also be pharmaceutical contain pharmaceutically acceptable excipients. After thawing the vaccine according to the invention, various substances can be added that are pharmaceutically acceptable and advantageous for administration.
- the invention also relates to frozen, mature, antigen-loaded dendritic cells.
- These cells according to the invention can be part of a pharmaceutical composition which, in addition to the cells, also contains conventional additives suitable for administration to humans.
- the present invention for the first time provides a vaccine that contains mature, antigen-loaded DC and can be frozen.
- a major advantage of the invention is that the survival rate of the DC after thawing is very high. After thawing the frozen DC, more than 75%, preferably more than 85% surviving DC, based on the number of frozen DC, is generally obtained. Such high survival rates of thawed DC had never been achieved without the addition of FCS. However, this is an important prerequisite for achieving effective immune stimulation.
- a significant advantage of freezing mature, antigen-loaded DC is that numerous aliquots of a vaccine can be made and frozen. As a result, the vaccine is immediately available when needed and can be applied in a very short time without lengthy culture steps.
- Antigen loading only after freezing and thawing mature DC makes it possible to load the DC variably according to the particular circumstances. For example, in the event of developing overstimulation or allergy to one of the peptides used for vaccination, this can be dispensed with during loading.
- the invention is therefore also based on the finding that the maturation stimulus according to the invention not only leads to full DC maturation, but also delivers DC that can survive better than DC that have been matured by other stimuli. So far, no attention has been paid to the maturation stimulus with regard to freezing.
- a further aspect of the invention is therefore a method for finding advantageous conditions for freezing DC, immature DC being provided and being cultivated in the presence of various maturation stimuli, the cells then being cultivated in medium with or without cytokines, preferably without cytokines, after at least one day of culture in medium with or without cytokines, the proportion of surviving cells is determined and finally the maturation stimulus is determined which gave the highest survival rate of DC.
- This maturation stimulus is then used to make DC, which is frozen.
- the number of living cells is preferably determined only after at least 2 days of culture in medium without cytokines, most preferably after at least 3 days.
- FIG 1 shows the influence of the cell concentration in the freezing vessels on the yield of DC after thawing.
- Mature DCs were made from healthy adult leukapheresis products, initially converting adherent monocytes to immature DCs by culture in GM-CSF + IL-4 for six days, then maturing for one day using a four-component cocktail. from TNF ⁇ + IL-lß + IL-6 + PGE 2 (see Example 1). Mature (day 7) DC were frozen at a freezing rate of -l ° C / min in pure autologous serum + 10% DMSO + 5% glucose at different cell densities (DC number / ml).
- FIG. 2 shows the influence of various freezing media on the DC yield after thawing.
- DCs were prepared as described in the legend to FIG. 1, and aliquots were at a concentration of 10 ⁇ 10 6 DC / ml in HSA + 10% DMSO, in autologous serum + 10% DMSO and in autologous serum + 10% DMSO + 5% glucose (final concentrations) frozen.
- FIG. 3 shows the survival rate of fresh DC in comparison with the frozen and thawed DC in "washout tests”.
- Figure 4 shows that freezing and thawing does not change the characteristic morphology of mature DC.
- Ripe, d7-DC which had been produced as described for FIG. 1, were either cultured immediately for a further 2 days or, after freezing, at least 3 hours of storage in the gas phase of liquid nitrogen and thawed again. Even after 48 hours of further culture in the absence of cytokines ("washout test"), the unfrozen (left) and frozen / thawed (right) DC remained stable, non-adherent cells.
- FIG. 5 shows that freezing and thawing does not change the characteristic phenotype of mature DC.
- FIG. 6 shows that freezing and thawing does not change the stimulatory capacity of mature DC in the primary allogeneic MLR ("Mixed Leukocyte Reaction").
- Mature d7 DCs were produced as shown in FIG. 1 and the allostimulatory potency of freshly prepared, not frozen DCs was compared with an aliquot of this DC which had been frozen and thawed (after storage in liquid nitrogen for 3 hours).
- Figure 7 shows that freezing and thawing does not change the ability of mature DCs to induce a strong IMP-specific CTL response.
- purified CD8 + T cells were cultivated without DC ⁇ addition of IMP. After 7 days, the T cells were harvested and examined for cytolytic activity using a standard 51 Cr release assay.
- T2 cells which were pulsed without or with 10 ⁇ g / ml IMP, served as target cells.
- Figure 8 shows that freezing and thawing does not change the ability of mature DC to induce a strong IMP-specific CD8 + T cell response (HLA-A2.1 / peptide tetramer analysis).
- the expansion of IMP peptide-specific CD8 + T cells (the percentage of tetramer-binding CD8 + T cells is shown in the figure) is comparable for fresh and frozen DC. Loading DC before freezing and after
- Figure 9 shows that contact with CD40L further improves the survival rate of thawed DC.
- Mature d7-DC were produced as described for FIG. 1.
- soluble primary CD40L 100 ng / ml
- FIG. 10 shows that DC can be successfully loaded with protein antigen before freezing.
- DC at their immature stage was pulsed by adding the model antigen tetanus toxoid (TT) (10 ⁇ g / ml) on day 6.
- Ripe DCs were then harvested on day 7 and frozen as described in the legend to Figure 3. Frozen, TT pulsed DCs were as stimulatory as freshly made TT pulsed, mature DCs.
- FIG. 11 shows that DC can be successfully loaded with peptide antigen before freezing.
- the expansion of melan-A peptide-specific CD8 + T cells is comparable to frozen DCs that were loaded before freezing or after thawing , See also Figure 8.
- FIG. 12 shows the induction of a helper line type 1 response against KLH in patients who were vaccinated as described in example 6.
- FIG. 13-15 show the results of Example 7.
- FIG. 16 shows a schematic illustration of the experimental setup of Example 8. The results of Example 8 are summarized in FIGS. 17 and 18.
- FIG. 17A shows the total number of DC after loading with tumor cell lysate or necrotic tumor cells and subsequent cryopreservation.
- FIG. 17B shows the allostimulatory potency of DC after loading with tumor cell lysate or necrotic tumor cells and subsequent cryopreservation.
- FIG. 17C shows the result of the FACS analysis after tumor loading and cryopreservation.
- FIG. 18A shows the result of the determination of the total number of. DC after loading with apoptotic tumor cells and subsequent cryopreservation.
- FIG. 18B shows the allostimulatory potency of DC after loading with apoptotic MEL 526 melanoma cells and subsequent cryopreservation.
- FIG. 18C shows the results of the FACS analysis of the MAGE-1 / HLA-Al Ag expression on Mage-1 peptide-pulsed DC before or after cryopreservation.
- FIG. 18D shows the comparison of the expression of MAGE-1 / HLA-Al complexes (determined by means of antibodies against MAGE-1 / HLA-Al complex) before and after cryopreservation on DC, which were loaded in different ways.
- FIG. 19 shows a schematic illustration of the experimental setup of Example 9, in which adenovirus-infected dendritic cells are compared with or without cryopreservation.
- the results of Example 9 are summarized in FIGS. 20 to 23
- FIG. 20 shows the recovery of adenovirus-infected dendritic cells after cryopreservation.
- the recovery rate of adeno-GFP-infected DC after freezing and thawing versus mock-treated (non-transfected) DC is comparable.
- Figure 21 CD4-T cell stimulating activity of adenovirus-infected dendritic cells after cryopreservation. It can be shown that cryopreservation does not change the allostimulatory activity of adenovirus-infected DC.
- Figures 22A and 22B show that a similar phenotype is present in adenovirus-infected DC with or without cryopreservation.
- Figures 23A and 23B show a phenotype of adenovirus-infected DC with or without cryopreservation.
- FIG. 24 shows the schematic test procedure of Example 10 in comparison to RNA-electroporated DC with or without cryopreservation. The results are summarized in Figures 25 to 27.
- FIG. 25 shows that the recovery after cryopreservation of EGFP-RNA electroporated DC is similar to that in the control experiment.
- FIG. 26 shows that cryopreservation does not change the allostimulatory capacity of the EGFP-RNA transfected DC.
- Figure 27 shows that the phenotype of RNA-transfected DC is similar to that in the control experiment.
- Figure 28 shows MHC class I and II restricted melanoma and influenza virus peptides that can be used in the method of the present invention.
- AS amino acids
- NT nucleotides
- NP nucleoprotein
- ana * analog peptide a most common DR4 subtype, approximately 80% b most common DR4 subtype, approximately 80% c
- AS amino acids
- NT nucleotides
- NP nucleoprotein
- ana * analog peptide a most common DR4 subtype, approximately 80% b most common DR4 subtype, approximately 80% c
- the survival rate of freshly produced, immature DC and of DC matured by various maturation stimuli was determined.
- Immature TLC were obtained by culture in complete medium with recombinant human GM-CSF (800 U / ml) and IL-4 (500 U / ml).
- GM-CSF 800 U / ml
- IL-4 500 U / ml
- the various maturation stimuli mentioned above were added to the DC
- the mature DC were harvested and cultivated for a further two days in the absence of cytokines.
- the survival rates after two days of culture as a percentage of the DC sown were: 38.25% for immature DC,
- DCs were frozen as follows: DCs were resuspended in cryogenic vessels in different concentrations (5, 20, 40, 60 and 100 x 10 6 per ml) either in pure autologous serum or in 20% human serum albumin ( HSA; consisting of 1000 ml electrolyte solution supplemented with 200 g human plasma proteins with at least 95% albumin; DRK blood donation service Baden-written, Baden-Baden, Germany).
- HSA human serum albumin
- the resulting DC suspension was mixed 1: 1 with the various freezing solutions described below, then immediately transferred to a 1.0 or 1.8 ml cryo jar.
- HSA + DMSO ⁇ glucose Consisting of 20% HSA solution (see above + 10, 15, 20 and 25% (v / v) DMSO + glucose (Glucosteril 40% TM, Fresenius, Germany, active ingredient: glucose monohydrate)) 2, 4, 6, 10, 20 or 30% (v / v)];
- Serum + DMSO + Glucose [pure autologous serum + 20% (v / v) DMSO ⁇ glucose added to 2, 4, 6, 10, 20 or 30%];
- Erythrocyte Freezing Solution TM Erythrocyte Freezing Solution TM (Fresenius, Dreieich, Germany), consisting of 38% glycerol, 2.9% sorbitol and 0.63% sodium chloride in sterile water];
- Frozen mature (day 7) DC were thawed as described under 1 and after a rest period of two hours at 37 ° C. and 5% CO 2 on tissue culture dishes (Falcon Bacton Dickinson Labware, New Jersey, USA), the cells were harvested (centrifugation for 10 min at 150 g and 22 ° C) for further use.
- the respective amounts of living DC were determined by a cell counter (Cassy Cell Counter and Analyzer System, Model TT, Scharfung System, Reutlingen, Germany; this system uses "Pulse area analysis” and permits the determination of cell numbers, cell size and volume and whether living cells are present) and also determined as a control by standard trypan blue staining.
- Optimally matured and frozen DC are freshly made DC equivalent in terms of survival and T-cell stimulatory activity.
- the morphology and phenotype of thawed DC was also compared to freshly made DC.
- the morphology of the cells was examined under an invert phase microscope (Leika DM IRB, Leika Mikroskopie und Systeme GmbH, Wetzlar, Germany) and recorded photographically.
- the phenotype of the cell populations was examined by a series of monoclonal antibodies and examined on a FACScan device (Becton Dickinson, New Jersey, USA) as described (Thurner et al. (1999) J. Immunol. Methods 223, 1). Dead cells were sorted out due to their light scattering properties. The result is shown in FIGS. 4 and 5. Frozen and thawed DC retain their characteristic morphological properties and phenotype for several days.
- IMP Melan-A A2.1-peptide-specific CD8 + T cells
- CTL were quantified by a standard lysis assay (Bhardwaj et al. (1994) J. Clin. Invest. 94, 797) or by tetrahedral staining at 37 ° C (Whelan et al. (1999) J. Immunol. 163, 4342).
- Target cells for the standard 4 hour 51 Cr release assay which was carried out at different effector / target cell ratios, were IMP-pulsed (10 ⁇ g / ml for 1 hour at 37 ° C.) T2A1 cells, non-pulsed T2A1 cells and K562 target cells (all 51 Cr labeled). All experiments were carried out with an 80-fold excess of K562 cells in order to block the natural killer cell activity.
- the specific lysis in% was calculated using the formula (specific release - spontaneous
- the cells were analyzed on a FACScan device (Becton Dickinson).
- Freezing and thawing DC does not change the ability of mature DC to induce a strong IMP-specific CLT response. Freezing and thawing also does not change the ability of mature DCs to induce strong IMP-specific CD8 + T cell responses, as demonstrated by HLA-A2.1 / peptide tetramer analysis.
- the DC were the various anti-apoptotic stimuli at 37 ° C overnight for the last 12-16 h of culture before freezing, for 4 h before freezing (cell density lxlO 6 in complete medium with GM-CSF and IL-4) and also exposed for 4 h after thawing (cell density lxlO 6 in complete medium with GM-CSF and IL-4).
- Short-term exposure of thawed DC to the anti-apoptotic stimuli was just as effective as the DC treatment before freezing and resulted in an increased survival rate, which was often only visible after 3 days in the "washout test”.
- CD40L ( Figure 9) and TRANCE / RANKL (results not shown) gave similar results. The results show that adding CD40L or TRANCE / RANKL improves the survival rate of DC beyond day 3.
- DC was loaded with tetanus toxoid (TT) (as an example of a protein antigen) or with IMP (as a model peptide).
- TT tetanus toxoid
- IMP a model peptide
- DC were made from fresh or frozen aliquots of PBMC from leukapheresis products (see above).
- TT was added to the immature cells on day 5 at 10 ⁇ g / ml.
- Matured DCs were harvested on day 7 and examined for their ability to induce TT-specific proliferative responses in PBMC, either freezing or after freezing and thawing (after 4 h).
- TT-pulsed DC were just as stimulatory as freshly made, TT-pulsed DC ( Figure 10). Both before freezing and after thawing, IMP- or Melan A-loaded DC stimulated equally well IMP- or Melan A-specific CTL (FIGS. 8 and 11). These results show that it is possible to prepare frozen aliquots of mature DC that are already loaded with antigen and can be used immediately after thawing.
- FIG. 12 shows the induction of a helper cell type 1 response against KLH in all vaccinated patients.
- the patients each received only a single subcutaneous administration of 4 million mature DCs, which were prepared from leukopheresates using GM-CSF and interleukin-4 and the maturation composition as described in the application (e.g. FIGS. 1 and 3) ,
- the control antigen KLH was added in a concentration of 10 ⁇ g / ml at the same time as the ripening composition and the DC was then frozen in portions.
- a patient from the study of Example 6 received several vaccinations with DC, with 4 million DC thawed in each case loaded with the peptides shown in FIGS. 13, 14 and 15 (ie only 1 peptide per 4 million DC) and injected subcutaneously were.
- Blood was drawn before the first vaccination and 14 days after the previous vaccination and immediately before the next vaccination, and a standard Elispot assay was carried out as described in Thurner et al. (1999), J. Exp. Med. 190, 1669-1678 under Material and Methods.
- the DCs used for the vaccination were produced as described in the legend to FIGS. 8 and 11 / in Example 5 and were only loaded with the corresponding peptides after thawing.
- FIG. 13 shows the induction of immunity to the influenza apeptides NP-A3 and IMP-A2 after a single vaccination (No. 2 means blood sample and Elispot measurement shortly before administration of vaccination No. 2) and shows an increase after another vaccination, however no change in EBV-A2 and IV-9-A2 peptides that were not used for vaccination.
- FIG. 2 shows the induction of immunity to the influenza apeptides NP-A3 and IMP-A2 after a single vaccination (No. 2 means blood sample and Elispot measurement shortly before administration of vaccination No. 2) and shows an increase after another vaccination, however no change in EBV-A2 and IV-9-A2 peptides that were not used for vaccination.
- FIG. 14 shows an induction of immunity against 4 class I-restricted tumor peptides, clearly and unequivocally against the peptide melan A-A2.1.
- FIG. 15 shows an induction of immunity against two class II restricted tumor peptides (Mage 3-DR13 and -DP4), but not against tyrosinase-DR4 and GP 100 DR4 (this represents a negative control since the patient was DR4 negative and the DC could not be loaded with these peptides).
- tumor cell preparations tumor cell lysates, necrotic or apoptotic tumor cells
- DC Dendritic cells
- TAA tumor-associated antigens
- Tumor cell preparation The Mel526 melanoma cell line was used to prepare the tumor cell preparations. Mel526 cells were washed in RPMI and treated by repetitive heating to 57 ° C. and subsequent cooling in the liquid nitrogen. The cell material was then broken up using an ultrasound device. Since necrosis is induced by the warming / freezing cycles, this type of tumor cell preparation, which contains all cell components, is referred to below as necrotic cell material. In order to obtain lysate, we connected ultracentrifugation to these steps to remove cell components and purify the proteins in the Centricon centrifuge. gationstube performed. According to the results of the Bradford analysis, we have the protein fraction with the higher activity, namely the> 10 KDa. used.
- DC were generated from leukapheresis according to the technique used in experimental immunotherapy. PBMC were plated out in Nunc Cell Factories and cultured with RPMI (1% autologous, heat-inactivated plasma) substituted with 1000 IU / ml GM-CSF and 500 IU / ml IL-4. On day 5, the immature DCs were used and loaded with the described tumor cell preparations in a concentration of 1: 1 for 4 hours. Loading: The loading was carried out in a 5 ml polypropylene reaction vessel at 37 ° C. and 5% CO 2 .
- the DC were plated out in 12 ml tissue culture plates and cultivated with a maturation cocktail consisting of TNF- ⁇ , IL- ⁇ , IL-6 and PGE 2 for 24 h. Freezing / thawing: Half of the DC in each case was loaded according to the method described (Feuerstein B. et al., J. Immunol. Methods 245: 15-29 (2000)) in 1.8 ml Nunc freeze vials at -80 ° C cryopreserved for 3 hours. The cells were then again thawed in accordance with the method described and cultured for one hour in RPMI medium at 37 ° C. and 5% CO 2 .
- a mixed leukocyte reaction test (MLR) was carried out to test the functional capacity.
- the loaded DCs were placed in an allogeneic MLR (4 days incubation with allogeneic leukocytes) and then pulsed with radioactive thymidine ( 3 H-thymidine) for 13 hours. It turned out comparable allostimulatory potencies for cryopreserved and non-cryopreserved loaded DC (FIGS. 17B, 18B).
- Phenotype To evaluate the expression of the surface molecules relevant for the antigen presentation and the functional state of the DC, a FACS analysis was carried out with the corresponding antibodies. A comparable surface expression pattern was found both for the different loading methods and after cryopreservation (FIG. 17C).
- Direct antigen detection For the direct detection of tumor antigen, an antibody was used that MAGE-1 in the HLA-Al context d. H. recognizes the complex of Mage-1 peptide and the HLA-Al molecule. The differently loaded DCs were stained with this antibody and analyzed in the FACS.
- the MAGE-1 / Al antibody was used to determine the effectiveness of the different loading methods.
- a significant loading was achieved with the tumor cell preparations (the melanoma cell line used expresses the Mage-1 antigen), which reached approximately 20% of the antigen density of the peptide pulse (FIG. 18D).
- the expression of the MAGE-1 / HLA-Al complex was detectable in comparable quantity before and after cryopreservation (calculated as positivity against the background of unloaded DC).
- the method of the present invention not only allows an effective cryopreservation of unloaded DC loaded with peptide or protein (as shown in Example 1-7), but also an effective one of DC, which with (tumor -) Cell preparations (simple necrotic tumor cells, lysates made from tumor cells or apoptotic tumor cells) were loaded.
- Effective means that freezing i) means that the cell loss after thawing is ⁇ 25% compared to unfrozen DC, ii) the thawed DC has a comparable T cell stimulatory capacity as the unfrozen DC (tested in the allo - genes MLR) and iii) the surface expression of antigens or ligands for
- T cell receptors ie specific MHC-peptide complexes
- T cell receptors are retained after the freezing and thawing process (shown by way of example by direct detection of a specific peptide / MHC complex, namely the MAGE-1 / HLA-Al complex, using one of these Complex-specifically recognizing monoclonal antibody).
- Dendritic cells transfected with adenoviruses can be frozen using the method according to the invention in such a way that the properties of the dendritic cells are comparable in comparison to non-transfected dendritic cells.
- mature DC with an infection multiplicity (MOI) of 500 for 2 hours were infected with an adenovirus vector (AD5) which contains a cDNA coding for the "Green Fluorescent Protein” (GFP). After washing twice, the cells were frozen at a concentration of 10 ⁇ 10 6 DC / ml in the HSA and 10% DMSO in 5% glucose (final concentration) and stored for 4 hours. After thawing, the viability of the cells was determined by trypain blue exclusion. The viable cell recovery rate is shown in Figure 20 as a percentage of frozen DC.
- mature DC were cryopreserved with adeno-GFP at an MOI of 500 as described above. After thawing and the indicated culture time, the cells were counterstained using antibodies specific for CD83, CD25, CD86, CD80, followed by PE-conjugated goat / mouse IG (Fab ') 2 fragments. The results are shown in Fig. 22A. In a comparable experiment using HLA class 1, HLA-DR and CD40 specific antibodies, the results shown in Figure 22B were obtained.
- Dendritic cells transfected with RNA can be frozen using the method according to the invention in such a way that the properties of the dendritic cells are comparable in comparison to non-transfected dendritic cells.
- the DC can be transfected with RNA in the immature stage - then matured - and then frozen as a mature DC (not shown).
- Mature DCs are preferably transfected with RNA and cryopreserved. The results are summarized in Figures 25 to 27.
- Control TLC were pulsed without the addition of RNA.
- the cells were frozen at a concentration of 10 ⁇ 10 6 DC / ml in HSA (with 10% DMSO and 5% glucose (final concentration)) and stored for 4 hours. After thawing, cell viability was determined by trypan blue exclusion. The recovery of viable cells is shown in Figure 25 as a percentage of the frozen DCs. Mature DCs were electroporated with EGFP-RNA and cryopreserved as described above. After thawing and a culture period of 48 hours, the dendritic cells were co-cultivated with allogeneic CD4 + T cells (2 ⁇ 10 5 / well) at the ratios indicated in FIG. 26. After 4 days, the cells were pulsed with [ 3 H] thymidine for 16 hours and the incorporation of the radioactivity was determined. 26 shows the mean values for triplicate measurement (with standard deviation). The numbers of T cells alone or DC alone were less than 1000 per minute.
- RNA electroporated DC does not change the phenotypic DC marker.
- mature DC were electroporated, with or without EGFP-RNA and cryopreserved as described above. After thawing and a cultivation period of 48 hours, the DC were counterstained with the mouse monoclonal antibodies and PE-conjugated anti-mouse Ig (Fab ') 2 fragments shown in FIG. 27, followed by FACS analysis.
- the numbers in FIG. 27 relate to the EGFP-positive DC in the lower right part of the square and the EGFP / DC marker double-positive DC in the upper right part.
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AU2001282123A AU2001282123B8 (en) | 2000-08-24 | 2001-08-24 | Method for producing ready to use, antigen loaded or unloaded, cryoconserved mature dendritic cells |
JP2002522234A JP4610847B2 (ja) | 2000-08-24 | 2001-08-24 | すぐ使用できる、抗原負荷また非負荷の凍結保存された成熟成樹状細胞の調製方法 |
BR0114030-2A BR0114030A (pt) | 2000-08-24 | 2001-08-24 | Método para preparação de células dendrìticas maduras, crioconservadas, prontas para uso, introduzidas ou não com antìgenos |
DE50114426T DE50114426D1 (de) | 2000-08-24 | 2001-08-24 | Verfahren zur herstellung gebrauchsfertiger, antigenbeladener oder -unbeladener, kryokonservierter, reifer dendritischer zellen |
KR1020037002645A KR100849740B1 (ko) | 2000-08-24 | 2001-08-24 | 항원이 로딩된 즉시 사용가능한 동결저장된 성숙한수상돌기 세포 또는 항원이 로딩되지 않은 즉시사용가능한 동결저장된 성숙한 수상돌기 세포의 제조 방법 |
AU8212301A AU8212301A (en) | 2000-08-24 | 2001-08-24 | Method for producing ready to use, antigen loaded or unloaded, cryoconserved mature dendritic cells |
EP01960708A EP1311658B1 (de) | 2000-08-24 | 2001-08-24 | Verfahren zur herstellung gebrauchsfertiger, antigenbeladener oder -unbeladener, kryokonservierter, reifer dendritischer zellen |
CA002420260A CA2420260A1 (en) | 2000-08-24 | 2001-08-24 | Method for producing ready to use, antigen loaded or unloaded, cryoconserved mature dendritic cells |
US10/362,715 US8236562B2 (en) | 2000-08-24 | 2001-08-24 | Method for producing ready to use, antigen-loaded or unloaded, cryoconserved mature dendritic cells |
DK01960708T DK1311658T3 (da) | 2000-08-24 | 2001-08-24 | Fremgangsmåde til fremstilling af brugsfærdige, eventuelt antigenholdige cryokonserverede modne dendritiske celler |
NZ524356A NZ524356A (en) | 2000-08-24 | 2001-08-24 | Method for producing ready to use, antigen loaded or unloaded, cryoconserved mature dendritic cells |
US13/479,612 US8574901B2 (en) | 2000-08-24 | 2012-05-24 | Cryoconserved mature dendritic cells |
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DE10041515A DE10041515A1 (de) | 2000-08-24 | 2000-08-24 | Verfahren zur Herstellung gebrauchsfertiger, Antigen-beladener oder -unbeladener, kryokonservierter reifer dendritischer Zellen |
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US13/479,612 Division US8574901B2 (en) | 2000-08-24 | 2012-05-24 | Cryoconserved mature dendritic cells |
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KR (1) | KR100849740B1 (de) |
CN (1) | CN1471575A (de) |
AT (1) | ATE411380T1 (de) |
AU (2) | AU8212301A (de) |
BR (1) | BR0114030A (de) |
CA (1) | CA2420260A1 (de) |
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Also Published As
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AU2001282123B2 (en) | 2008-02-28 |
EP1311658A1 (de) | 2003-05-21 |
CN1471575A (zh) | 2004-01-28 |
ATE411380T1 (de) | 2008-10-15 |
KR100849740B1 (ko) | 2008-08-01 |
US20040253574A1 (en) | 2004-12-16 |
US8236562B2 (en) | 2012-08-07 |
EP1311658B1 (de) | 2008-10-15 |
BR0114030A (pt) | 2003-09-23 |
DK1311658T3 (da) | 2009-01-12 |
JP4610847B2 (ja) | 2011-01-12 |
CA2420260A1 (en) | 2003-02-21 |
AU8212301A (en) | 2002-03-04 |
AU2001282123B8 (en) | 2008-04-03 |
NZ524356A (en) | 2004-07-30 |
US20120301959A1 (en) | 2012-11-29 |
ZA200301466B (en) | 2004-02-24 |
JP2004507238A (ja) | 2004-03-11 |
DE50114426D1 (de) | 2008-11-27 |
DE10041515A1 (de) | 2002-03-14 |
KR20030061782A (ko) | 2003-07-22 |
US8574901B2 (en) | 2013-11-05 |
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