JP7262709B2 - 製剤 - Google Patents
製剤 Download PDFInfo
- Publication number
- JP7262709B2 JP7262709B2 JP2018559880A JP2018559880A JP7262709B2 JP 7262709 B2 JP7262709 B2 JP 7262709B2 JP 2018559880 A JP2018559880 A JP 2018559880A JP 2018559880 A JP2018559880 A JP 2018559880A JP 7262709 B2 JP7262709 B2 JP 7262709B2
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- formulation
- stereoreticular
- silicate mineral
- ice
- water
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- 239000008194 pharmaceutical composition Substances 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 54
- 239000000203 mixture Substances 0.000 claims description 35
- 238000009472 formulation Methods 0.000 claims description 34
- 229910052604 silicate mineral Inorganic materials 0.000 claims description 32
- 238000007710 freezing Methods 0.000 claims description 19
- 230000008014 freezing Effects 0.000 claims description 19
- 239000010433 feldspar Substances 0.000 claims description 18
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical group [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 15
- 238000005138 cryopreservation Methods 0.000 claims description 14
- 239000002667 nucleating agent Substances 0.000 claims description 13
- 150000003863 ammonium salts Chemical class 0.000 claims description 11
- 239000002577 cryoprotective agent Substances 0.000 claims description 11
- 235000019270 ammonium chloride Nutrition 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000004781 supercooling Methods 0.000 claims description 7
- 230000001737 promoting effect Effects 0.000 claims description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052656 albite Inorganic materials 0.000 claims description 3
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 229910052651 microcline Inorganic materials 0.000 claims 2
- 229910052652 orthoclase Inorganic materials 0.000 claims 2
- 229910052654 sanidine Inorganic materials 0.000 claims 2
- 210000004027 cell Anatomy 0.000 description 33
- 239000000243 solution Substances 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 230000006910 ice nucleation Effects 0.000 description 11
- 230000006911 nucleation Effects 0.000 description 10
- 238000010899 nucleation Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000013078 crystal Substances 0.000 description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 description 8
- 239000011707 mineral Substances 0.000 description 8
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- 239000007788 liquid Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
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- 238000001816 cooling Methods 0.000 description 6
- 239000003814 drug Substances 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 5
- 238000004108 freeze drying Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 150000004760 silicates Chemical class 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 235000011130 ammonium sulphate Nutrition 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000003833 cell viability Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000010902 straw Substances 0.000 description 3
- JKFYKCYQEWQPTM-UHFFFAOYSA-N 2-azaniumyl-2-(4-fluorophenyl)acetate Chemical compound OC(=O)C(N)C1=CC=C(F)C=C1 JKFYKCYQEWQPTM-UHFFFAOYSA-N 0.000 description 2
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 description 2
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 2
- 239000005695 Ammonium acetate Substances 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 229910021612 Silver iodide Inorganic materials 0.000 description 2
- 108700042768 University of Wisconsin-lactobionate solution Proteins 0.000 description 2
- 229940072056 alginate Drugs 0.000 description 2
- 235000010443 alginic acid Nutrition 0.000 description 2
- 229920000615 alginic acid Polymers 0.000 description 2
- 229940043376 ammonium acetate Drugs 0.000 description 2
- 235000019257 ammonium acetate Nutrition 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 229910052661 anorthite Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000012620 biological material Substances 0.000 description 2
- 239000012472 biological sample Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- GWWPLLOVYSCJIO-UHFFFAOYSA-N dialuminum;calcium;disilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] GWWPLLOVYSCJIO-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
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- 238000002474 experimental method Methods 0.000 description 2
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- 235000011187 glycerol Nutrition 0.000 description 2
- 238000013537 high throughput screening Methods 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
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- 229910052655 plagioclase feldspar Inorganic materials 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 229940045105 silver iodide Drugs 0.000 description 2
- UCSJYZPVAKXKNQ-HZYVHMACSA-N streptomycin Chemical compound CN[C@H]1[C@H](O)[C@@H](O)[C@H](CO)O[C@H]1O[C@@H]1[C@](C=O)(O)[C@H](C)O[C@H]1O[C@@H]1[C@@H](NC(N)=N)[C@H](O)[C@@H](NC(N)=N)[C@H](O)[C@H]1O UCSJYZPVAKXKNQ-HZYVHMACSA-N 0.000 description 2
- 238000000859 sublimation Methods 0.000 description 2
- 230000008022 sublimation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000000346 sugar Nutrition 0.000 description 2
- 150000008163 sugars Chemical class 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 229960005486 vaccine Drugs 0.000 description 2
- HDTRYLNUVZCQOY-UHFFFAOYSA-N α-D-glucopyranosyl-α-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OC1C(O)C(O)C(O)C(CO)O1 HDTRYLNUVZCQOY-UHFFFAOYSA-N 0.000 description 1
- CHADEQDQBURGHL-UHFFFAOYSA-N (6'-acetyloxy-3-oxospiro[2-benzofuran-1,9'-xanthene]-3'-yl) acetate Chemical compound O1C(=O)C2=CC=CC=C2C21C1=CC=C(OC(C)=O)C=C1OC1=CC(OC(=O)C)=CC=C21 CHADEQDQBURGHL-UHFFFAOYSA-N 0.000 description 1
- XZXYQEHISUMZAT-UHFFFAOYSA-N 2-[(2-hydroxy-5-methylphenyl)methyl]-4-methylphenol Chemical compound CC1=CC=C(O)C(CC=2C(=CC=C(C)C=2)O)=C1 XZXYQEHISUMZAT-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 229920002307 Dextran Polymers 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 1
- 241000124008 Mammalia Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
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- 229930182555 Penicillin Natural products 0.000 description 1
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- 241000589615 Pseudomonas syringae Species 0.000 description 1
- MUPFEKGTMRGPLJ-RMMQSMQOSA-N Raffinose Natural products O(C[C@H]1[C@@H](O)[C@H](O)[C@@H](O)[C@@H](O[C@@]2(CO)[C@H](O)[C@@H](O)[C@@H](CO)O2)O1)[C@@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 MUPFEKGTMRGPLJ-RMMQSMQOSA-N 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- HDTRYLNUVZCQOY-WSWWMNSNSA-N Trehalose Natural products O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 HDTRYLNUVZCQOY-WSWWMNSNSA-N 0.000 description 1
- MUPFEKGTMRGPLJ-UHFFFAOYSA-N UNPD196149 Natural products OC1C(O)C(CO)OC1(CO)OC1C(O)C(O)C(O)C(COC2C(C(O)C(O)C(CO)O2)O)O1 MUPFEKGTMRGPLJ-UHFFFAOYSA-N 0.000 description 1
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- 229910052650 alkali feldspar Inorganic materials 0.000 description 1
- HDTRYLNUVZCQOY-LIZSDCNHSA-N alpha,alpha-trehalose Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 HDTRYLNUVZCQOY-LIZSDCNHSA-N 0.000 description 1
- 229960001040 ammonium chloride Drugs 0.000 description 1
- 150000003868 ammonium compounds Chemical class 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
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- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 230000000975 bioactive effect Effects 0.000 description 1
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- 235000012000 cholesterol Nutrition 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000000959 cryoprotective effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
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- 210000002308 embryonic cell Anatomy 0.000 description 1
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- 235000013305 food Nutrition 0.000 description 1
- 239000012520 frozen sample Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 210000003494 hepatocyte Anatomy 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 210000002977 intracellular fluid Anatomy 0.000 description 1
- 239000010978 jasper Substances 0.000 description 1
- 229910052907 leucite Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000007246 mechanism Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000003278 mimic effect Effects 0.000 description 1
- 210000005087 mononuclear cell Anatomy 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- XGFDHKJUZCCPKQ-UHFFFAOYSA-N n-nonadecyl alcohol Natural products CCCCCCCCCCCCCCCCCCCO XGFDHKJUZCCPKQ-UHFFFAOYSA-N 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910052664 nepheline Inorganic materials 0.000 description 1
- 239000010434 nepheline Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 210000000287 oocyte Anatomy 0.000 description 1
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- 230000003204 osmotic effect Effects 0.000 description 1
- 210000001672 ovary Anatomy 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229940049954 penicillin Drugs 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- XJMOSONTPMZWPB-UHFFFAOYSA-M propidium iodide Chemical compound [I-].[I-].C12=CC(N)=CC=C2C2=CC=C(N)C=C2[N+](CCC[N+](C)(CC)CC)=C1C1=CC=CC=C1 XJMOSONTPMZWPB-UHFFFAOYSA-M 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- MUPFEKGTMRGPLJ-ZQSKZDJDSA-N raffinose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO[C@@H]2[C@@H]([C@@H](O)[C@@H](O)[C@@H](CO)O2)O)O1 MUPFEKGTMRGPLJ-ZQSKZDJDSA-N 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N1/00—Preservation of bodies of humans or animals, or parts thereof
- A01N1/02—Preservation of living parts
- A01N1/0205—Chemical aspects
- A01N1/021—Preservation or perfusion media, liquids, solids or gases used in the preservation of cells, tissue, organs or bodily fluids
- A01N1/0221—Freeze-process protecting agents, i.e. substances protecting cells from effects of the physical process, e.g. cryoprotectants, osmolarity regulators like oncotic agents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Description
・直径2~4mm、長さ140mmまでの薄肉のチューブで、容量0.2ml~0.5mlのストロー;
・直径約12.5mm、容量0.5ml~5.0mlの幅広の短いチューブである冷結保存バイアル;
・大容量の凍結保存用に5ml~1000mlの容量を有する可撓性バッグ;
・マイクロタイタープレート、マトリックスチューブ、およびロボット工学およびハイスループットのスクリーニングで使用される他のSBSフォーマット。
氷核剤として作用することができる立体網状珪酸塩鉱物、および
アンモニウム塩を含む製剤を提供する。
Whaleら(2015)によりTechnique for Quantifying Heterogeneous Ice Nucleation in Microlitre Supercooled Water Droplets.Atmos.Meas.Tech.8,2437-2447に詳細に記載されている浸漬粒子装置でのμL核生成実験を行った。この装置は、1μLという容量の約50滴の凍結温度を測定する。これらの実験では、立体網状珪酸塩(IceStart(商標)(Asymptote Ltd))の0.1重量%懸濁液を、純水および塩化アンモニウム、硫酸塩および水酸化物の0.07M溶液において凍結させた。結果を図1に示す。この図から、アンモニウム化合物が過冷却を約2.5℃低下させたことが見て取れる。
細胞の培養および封入
HepG2細胞を単層で培養した。80~90%のコンフルエンスに達したら、細胞を継代した。2%アルギネート(Manugel、FMCバイオポリマー)を含有する水溶液を、4000000cells/mlを含有する培地で、1:1の比率で混合した。この混合物をGenialab Jetcutter封入システムに通して、0.204MのCaCl2溶液で重合させた、半径500μmの球形液滴を産生した。これは個々の細胞が内部に分布したスフェロイドを産生した。スフェロイドを、T175フラスコ中の50U/mlのペニシリン、50μg/mlのストレプトマイシン(Invitrogen plc)、1Mの0.5%CaCl2(v/v)、および10%ヒト血漿を添加した修飾α-MEMの加温培養物に、スフェロイド:培地の比1:32で添加した。これらを37℃、5%CO2で、加湿インキュベーター内で培養した。2~3日ごとに100%の培地交換を行った。
凍結保存は、スフェロイドを4℃に冷却し、1:1の比で、以下の前冷却溶液と混合することによって実施した:
0.2wt%の長石を核剤として含有するViaspan溶液中の24%ジメチルスルホキシド(DMSO)(DMSO+Nuc)
Viaspan溶液(v/v)中の24%DMSO(DMSO-Nuc)
核剤として0.2重量%の長石を含有する300mMの塩化アンモニウム(v/v)中の24%(NH4Cl+Nuc)
300mMの塩化アンモニウム(v/v)中24%DMSO(NH4Cl-Nuc)
溶液を5分間平衡化させた。その後、1mlの上清を1.8mlの冷結保存バイアル5個に条件ごとに添加し、その後、EF600制御速度フリーザーで0.3℃/分で4℃から-100℃まで冷却した。冷却作動が完了したら、冷結保存バイアルを液体窒素貯蔵庫に移した。
保管していた液体窒素からサンプルを取り出し、最後の氷結晶がちょうど溶けるまで37℃の水に浸して解凍した。これには330秒かかった。凍結保護剤は、4℃に冷却した培地を用いて段階的に洗い流した。凍結保護剤を洗い流した後、37℃に温めた培地を加え、ELSを37℃、5%CO2の加湿インキュベーターの培養物に入れた。
生存率
指定された時点で、ELSを培養液から取り出し、蛍光顕微鏡下で見るためにヨウ化プロピジウム溶液(PI、1mg/ml、Sigma)20μlおよび二酢酸フルオレセイン溶液(FDA、1mg/ml、Sigma)で10μlで染色した。PIは機能しない膜で細胞の核を染色するので、死細胞の指標となる。FDAは代謝的に活性のある細胞を染色する。較正されたマクロを用いたPIとFDAの放射の強度を比較することにより、生存率を判定することができる。結果を図2に示す。
総細胞数は、ヌクレオカウンターシステムを使用して判定した。ELSをPBSで洗浄して脱凝集させる前に、16mMのEDTA溶液(Applichem)を用いてアルギン酸塩から遊離させた。すべての細胞を溶液で溶解し、核小体をPIで染色した。この溶液をヌクレオカセットに引き込み、染色された核を計数した。HepG2細胞は単核細胞であるため、これをELSの細胞密度に変換することができる。結果を図3に示す。
Claims (11)
- 水含有の生物学的実体を凍結処理する間に非自発的な氷の形成を促進するための製剤であって、
氷核剤として作用することができる立体網状珪酸塩鉱物、および
アンモニウム塩
を含む、製剤であって、
前記立体網状珪酸塩鉱物が立体網状アルミノ珪酸塩であり、
前記製剤が水を含有する場合におけるアリコート当たり、前記立体網状珪酸塩鉱物が、その表面積が3×10-6cm2を超えるような量で前記製剤中に存在し、
前記アンモニウム塩が300mMの濃度の塩化アンモニウムであり、
前記立体網状アルミノ珪酸塩が、0.2重量%の濃度である、製剤。 - 前記立体網状珪酸塩鉱物が多元素である、請求項1に記載の製剤。
- 前記立体網状珪酸塩鉱物が長石である、請求項1または2に記載の製剤。
- 前記立体網状珪酸塩鉱物が、NaAlSi3O8およびKAlSi3O8を主成分とする長石である、請求項3に記載の製剤。
- 前記立体網状珪酸塩鉱物が、KAlSi3O8を主成分とする長石である、請求項3または4に記載の製剤。
- 使用時に8℃以下の過冷却で、前記水含有の分量を凍結させる、請求項1乃至5のいずれか1項に記載の製剤。
- 1つ以上の凍結保護剤をさらに含む、請求項1乃至6のいずれか1項に記載の製剤。
- 前記各凍結保護剤が、複数のヒドロキシル基の存在を特徴とする、請求項7に記載の製剤。
- 生物学的に許容される、請求項1乃至8のいずれか1項に記載の製剤。
- 水含有の生物学的実体を容器内で凍結処理する際の、請求項1乃至9のいずれか1項に定義されている製剤の使用。
- 前記生物学的実体が細胞または細胞の集合体である、請求項10に記載の使用。
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