JP2011111406A - Vitrified liquid for cryopreservation of animal cell - Google Patents
Vitrified liquid for cryopreservation of animal cell Download PDFInfo
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- JP2011111406A JP2011111406A JP2009268123A JP2009268123A JP2011111406A JP 2011111406 A JP2011111406 A JP 2011111406A JP 2009268123 A JP2009268123 A JP 2009268123A JP 2009268123 A JP2009268123 A JP 2009268123A JP 2011111406 A JP2011111406 A JP 2011111406A
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- 238000005138 cryopreservation Methods 0.000 title claims abstract description 53
- 210000004102 animal cell Anatomy 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 title abstract description 10
- 238000004017 vitrification Methods 0.000 claims abstract description 24
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims abstract description 20
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims abstract description 20
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims abstract description 20
- 210000002966 serum Anatomy 0.000 claims abstract description 19
- 229920002678 cellulose Polymers 0.000 claims abstract description 15
- 239000001913 cellulose Substances 0.000 claims abstract description 15
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 claims abstract description 7
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 7
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 7
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 7
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 36
- 239000002577 cryoprotective agent Substances 0.000 claims description 30
- 229930006000 Sucrose Natural products 0.000 claims description 15
- 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 claims description 15
- 239000005720 sucrose Substances 0.000 claims description 15
- -1 dimethylsulfoside Chemical compound 0.000 claims description 11
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 9
- 210000000170 cell membrane Anatomy 0.000 claims description 8
- 210000004027 cell Anatomy 0.000 claims description 5
- 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 claims description 4
- 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 claims description 4
- 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 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 3
- 238000007710 freezing Methods 0.000 abstract description 4
- 230000008014 freezing Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 230000000959 cryoprotective effect Effects 0.000 abstract 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 7
- CEAZRRDELHUEMR-URQXQFDESA-N Gentamicin Chemical compound O1[C@H](C(C)NC)CC[C@@H](N)[C@H]1O[C@H]1[C@H](O)[C@@H](O[C@@H]2[C@@H]([C@@H](NC)[C@@](C)(O)CO2)O)[C@H](N)C[C@@H]1N CEAZRRDELHUEMR-URQXQFDESA-N 0.000 description 6
- 229930182566 Gentamicin Natural products 0.000 description 6
- 239000000654 additive Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 6
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- 229960002518 gentamicin Drugs 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000006467 substitution reaction Methods 0.000 description 5
- 239000012595 freezing medium Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 210000002257 embryonic structure Anatomy 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 229920000609 methyl cellulose Polymers 0.000 description 3
- 239000001923 methylcellulose Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- DVQHRBFGRZHMSR-UHFFFAOYSA-N sodium methyl 2,2-dimethyl-4,6-dioxo-5-(N-prop-2-enoxy-C-propylcarbonimidoyl)cyclohexane-1-carboxylate Chemical compound [Na+].C=CCON=C(CCC)[C-]1C(=O)CC(C)(C)C(C(=O)OC)C1=O DVQHRBFGRZHMSR-UHFFFAOYSA-N 0.000 description 3
- 241000283690 Bos taurus Species 0.000 description 2
- 238000003744 In vitro fertilisation Methods 0.000 description 2
- 230000003115 biocidal effect Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000001850 reproductive effect Effects 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- WZFUQSJFWNHZHM-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 WZFUQSJFWNHZHM-UHFFFAOYSA-N 0.000 description 1
- GAWIXWVDTYZWAW-UHFFFAOYSA-N C[CH]O Chemical group C[CH]O GAWIXWVDTYZWAW-UHFFFAOYSA-N 0.000 description 1
- 241000282472 Canis lupus familiaris Species 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- 229920003114 HPC-L Polymers 0.000 description 1
- 229920003115 HPC-SL Polymers 0.000 description 1
- 229920003116 HPC-SSL Polymers 0.000 description 1
- 241000124008 Mammalia Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000282887 Suidae Species 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 230000003833 cell viability Effects 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000002016 disaccharides Chemical class 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 239000012679 serum free medium Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
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- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Description
本発明は、血清を含まない新規な生体細胞のガラス化凍結保存液に関する。 The present invention relates to a novel vitrified cryopreservation solution of living cells that does not contain serum.
従来より、動物細胞を凍結保存する場合、その凍結培地中に血清の添加を必要とする。また、血清の替りとしてメチルセルロースを添加した凍結保存用培地を用いて凍結する方法も確立されている。
血清の構成成分は、未だ完全に解明されておらず、その上、凍結保存中に動物細胞に何らかの変異を促す因子が存在する可能性もある。また血清やメチルセルロースを細胞凍結時の保護剤として添加した、凍結保存用培地を用いても、それらによって十分に凍結保存ができない動物細胞があることも知られている。
近年、生殖医療の分野では、卵子および胚の凍結保存がIVF治療の基幹技術として重要な役割を果たしている。我が国だけでも年間20万件を超える。IVF治療において近年、開発、実用化されたガラス化保存法がその標準法として普及定着している。一方、生殖医療に用いられる様々な培地、凍結液の安全性についても、そのニーズに基づいた規制が進み始めており、血清など、従来の培養、凍結保存液に不可欠である生体由来物質に対し、組成が明らかで安全な代替物質への移行が望まれている。
Conventionally, when animal cells are cryopreserved, it is necessary to add serum to the freezing medium. In addition, a method of freezing using a cryopreservation medium added with methylcellulose instead of serum has been established.
Serum components have not yet been fully elucidated, and there may be factors that induce some mutation in animal cells during cryopreservation. It is also known that there are animal cells that cannot be sufficiently cryopreserved by using a cryopreservation medium to which serum or methylcellulose is added as a protective agent during cell freezing.
In recent years, in the field of reproductive medicine, the cryopreservation of eggs and embryos has played an important role as a basic technique for IVF treatment. Japan alone exceeds 200,000 cases per year. In recent years, the vitrification preservation method developed and put into practical use in IVF treatment has become widespread as the standard method. On the other hand, as for the safety of various culture media and frozen solutions used in reproductive medicine, regulations based on their needs have begun to progress. For biological substances that are indispensable for conventional culture and cryopreservation solutions such as serum, There is a desire to move to a safe alternative with a clear composition.
特開平5−7489(特許文献1)には、血清を含まず、凍結保護剤として2糖類であるトレハロースを含有することを特徴とする動物細胞の凍結保存用血清不含培地を開示しており、また、血清の替りとしてメチルセルロースを添加した凍結保存用培地を用いて凍結する方法が確立されていることも開示している。
また、特表2000−500327(特許文献2)は、ガラス化液にカルボキシメチルセルロースを添加することを開示している。
Japanese Patent Application Laid-Open No. 5-7489 (Patent Document 1) discloses a serum-free medium for cryopreservation of animal cells, which does not contain serum and contains trehalose, a disaccharide, as a cryoprotectant. It also discloses that a method of freezing using a cryopreservation medium to which methylcellulose is added instead of serum has been established.
JP 2000-500327 (Patent Document 2) discloses adding carboxymethyl cellulose to a vitrification solution.
特に、本願発明者が鋭意研究したところ、ガラス化凍結保存液に添加する保存細胞膜非透過性凍結保護物質として、ヒドロキシプロピルセルロースが有効かつ添加の容易性が高いことを知見した。
本発明の目的は、血清を用いない既知の成分からなる凍結保護物質を含有し、かつ良好にガラス化凍結が可能なガラス化凍結保存液を提供するものである。
In particular, as a result of intensive studies by the present inventors, it has been found that hydroxypropylcellulose is effective and easy to add as a preserved cell membrane impermeable cryoprotectant to be added to a vitrified cryopreservation solution.
An object of the present invention is to provide a vitrified cryopreservation solution that contains a cryoprotectant composed of known components that do not use serum and that can be vitrified and frozen well.
上記目的を達成するものは、以下のものである。
(1) 血清を含まず、凍結保護物質としてヒドロキシプロピルセルロース、ヒドロキシプロピルメチルセルロース、ヒドロキシエチルメチルセルロースからなる群より選択された少なくとも一種の水溶性セルロース系凍結保護物質を含有する動物細胞のガラス化凍結保存液。
(2) 前記ガラス化凍結保存液は、グリセロール、プロピレングリコール、ジメチルスルホサイド、エチレングリコール、ブタンジオールから選択される1種または2種以上の細胞膜透過性凍結保護物質を含有するものである上記(1)に記載の動物細胞のガラス化凍結保存液。
(3) 前記ガラス化凍結保存液は、前記セルロース系凍結保護物質に加えて、スクロース、トレハロース、ポリエチレングリコール、ポリビニルピロリドンから選択される1種または2種以上の細胞膜非透過性凍結保護物質を含有するものである上記(1)または(2)に記載の動物細胞のガラス化凍結保存液。
(4) 前記ガラス化凍結保存液は、前記セルロース系凍結保護物質に加えて、スクロースを含有するものである上記(1)または(2)に記載の動物細胞のガラス化凍結保存液。
(5) 前記ガラス化凍結保存液は、前記セルロース系凍結保護物質に加えて、スクロース、ジメチルスルホサイドおよびエチレングリコールを含有するものである上記(1)または(2)に記載の動物細胞のガラス化凍結保存液。
What achieves the above object is as follows.
(1) Vitrified cryopreservation of animal cells containing no serum and containing at least one water-soluble cellulose cryoprotectant selected from the group consisting of hydroxypropylcellulose, hydroxypropylmethylcellulose, and hydroxyethylmethylcellulose as a cryoprotectant liquid.
(2) The above vitrified cryopreservation solution contains one or more cell membrane-permeable cryoprotectants selected from glycerol, propylene glycol, dimethylsulfoside, ethylene glycol, and butanediol. The vitrified cryopreservation solution for animal cells according to 1).
(3) The vitrified cryopreservation solution contains one or more cell membrane impermeable cryoprotectants selected from sucrose, trehalose, polyethylene glycol, and polyvinylpyrrolidone in addition to the cellulose cryoprotectant. The vitrified cryopreservation solution for animal cells according to (1) or (2) above.
(4) The vitrification cryopreservation solution for animal cells according to (1) or (2) above, wherein the vitrification cryopreservation solution contains sucrose in addition to the cellulose cryoprotectant.
(5) The glass for animal cells according to (1) or (2) above, wherein the vitrified cryopreservation solution contains sucrose, dimethylsulfoside and ethylene glycol in addition to the cellulose cryoprotectant. Frozen storage solution.
本発明のガラス化凍結保存液は、血清を含まず、凍結保護物質としてヒドロキシプロピルセルロースを含有するものであるので、血清を含有しないにもかかわらず血清を含有するガラス化凍結保存液と同等の細胞生存率を持ち、かつヒドロキシプロピルセルロースは、非イオン性の水溶性セルロースエーテルであるため、ガラス化凍結保存液に添加したときの溶解性が極めて良好である。 Since the vitrified cryopreservation solution of the present invention does not contain serum and contains hydroxypropylcellulose as a cryoprotectant, it is equivalent to a vitrified cryopreservation solution containing serum despite not containing serum. Since it has cell viability and hydroxypropylcellulose is a nonionic water-soluble cellulose ether, its solubility when added to a vitrified cryopreservation solution is extremely good.
本発明のガラス化凍結保存液について、実施例を用いて説明する。
本発明の動物細胞のガラス化凍結保存液は、血清を含まず、凍結保護物質としてヒドロキシプロピルセルロース、ヒドロキシプロピルメチルセルロース、ヒドロキシエチルメチルセルロースからなる群より選択された少なくとも一種の水溶性セルロース系凍結保護物質を含有するものである。
本発明のガラス化凍結保存液を用いてガラス化凍結する動物細胞としては、家畜(ウシ、ブタなど)、愛玩動物(ネコ、イヌなど)などのほ乳類の精子、卵子、胚、また、人間の精子、卵子、胚などがあげられる。
本発明で用いる水溶性セルロース系凍結保護物質は、天然物であるセルロースを原料とし、これを苛性ソーダで処理した後、エーテル化剤と反応させることにより得られる非イオン性の水溶性セルロースである。
ヒドロキシプロピルセルロースは、セルロースの水酸基の水素原子の一部をヒドロキシプロピル(ヒドロキシプロポキシ基)で置換したものである。そして、ヒドロキシプロピルセルロースとしては、ヒドロキシプロポキシ基による置換率は、10〜80%であることが好ましく、特に、30〜60%であることが好ましい。
ヒドロキシプロピルメチルセルロースは、セルロースの水酸基の水素原子の一部をメチル(メトキシ基)およびヒドロキシプロピル(ヒドロキシプロポキシ基)で置換したものである。そして、ヒドロキシプロピルメチルセルロースとしては、ヒドロキシプロポキシ基置換率は、7〜12%であり、メトキシ基置換率は、17〜30%であることが好ましい。
ヒドロキシエチルメチルセルロースは、セルロースの水酸基の水素原子の一部をメチル(メトキシ基)およびヒドロキシエチル(ヒドロキシエトキシ基)で置換したものである。また、ヒドロキシエチルメチルセルロースとしては、ヒドロキシエトキシ基置換率は、7〜12%であり、メトキシ基置換率は、17〜30%であることが好ましい。
そして、上述したセルロース系凍結保護物質の分子量は、30000〜200000程度のものが好適であり、特に、80000〜180000が好ましい。また、ヒドロキシプロピルセルロースとしては、特に、30000〜170000が好ましい。
また、ガラス化凍結保存液におけるセルロース系凍結保護物質の添加量は、0.6g/L〜6g/Lであることが好ましい。また、本発明のガラス化凍結保存液は、セルロース系凍結保護物質としては、上述した3種のものより一つのみを選択して添加するもの、任意の2つを選択して添加するもの、さらには、3種すべてを選択して添加するもののいずれかであってもよい。
The vitrification cryopreservation solution of the present invention will be described using examples.
The vitrified cryopreservation solution for animal cells of the present invention does not contain serum, and at least one water-soluble cellulose cryoprotectant selected from the group consisting of hydroxypropylcellulose, hydroxypropylmethylcellulose, and hydroxyethylmethylcellulose as a cryoprotectant It contains.
Examples of animal cells that are vitrified and frozen using the vitrification cryopreservation solution of the present invention include sperm, eggs, embryos of mammals such as domestic animals (cow, pigs, etc.), pets (cats, dogs, etc.) Examples include sperm, eggs, and embryos.
The water-soluble cellulose cryoprotectant used in the present invention is nonionic water-soluble cellulose obtained by reacting a natural product cellulose with a caustic soda and then reacting with an etherifying agent.
Hydroxypropyl cellulose is obtained by substituting part of the hydrogen atoms of the hydroxyl group of cellulose with hydroxypropyl (hydroxypropoxy group). And as hydroxypropylcellulose, it is preferable that the substitution rate by a hydroxypropoxy group is 10 to 80%, and it is especially preferable that it is 30 to 60%.
Hydroxypropyl methylcellulose is obtained by substituting a part of hydrogen atoms of hydroxyl group of cellulose with methyl (methoxy group) and hydroxypropyl (hydroxypropoxy group). As hydroxypropylmethylcellulose, the hydroxypropoxy group substitution rate is preferably 7 to 12%, and the methoxy group substitution rate is preferably 17 to 30%.
Hydroxyethyl methylcellulose is obtained by substituting part of the hydrogen atoms of the hydroxyl group of cellulose with methyl (methoxy group) and hydroxyethyl (hydroxyethoxy group). Moreover, as hydroxyethyl methylcellulose, it is preferable that a hydroxyethoxy group substitution rate is 7 to 12%, and a methoxy group substitution rate is 17 to 30%.
And as for the molecular weight of the cellulose cryoprotectant mentioned above, the thing of about 30000-200000 is suitable, and 80000-18000 are especially preferable. Moreover, as hydroxypropylcellulose, 30000-170000 are especially preferable.
Moreover, it is preferable that the addition amount of the cellulosic cryoprotectant in the vitrification cryopreservation solution is 0.6 g / L to 6 g / L. Moreover, the vitrification cryopreservation liquid of the present invention is a cellulosic cryoprotectant that is added by selecting only one from the above-mentioned three types, and by adding any two selected, Furthermore, it may be any one selected by adding all three types.
ガラス化凍結保存液は、細胞膜透過性凍結保護物質と細胞膜非透過性凍結保護物質を含有するものであることが好ましい。
そして、本発明のガラス化凍結保存液は、細胞膜非透過性凍結保護物質として、ヒドロキシプロピルセルロースを含有するものである。さらに、本発明のガラス化凍結保存液は、ヒドロキシプロピルセルロースに加えて、スクロース、トレハロース、ポリエチレングリコール、ポリビニルピロリドンから選択される1種または2種以上の細胞膜非透過性凍結保護物質を含有するものであることが好ましい。
特に、細胞膜非透過性凍結保護物質として、ヒドロキシプロピルセルロースに加えて、スクロースを含有するものであることが好ましい。
また、本発明のガラス化凍結保存液に用いる細胞膜透過性凍結保護物質としては、グリセロール、プロピレングリコール、ジメチルスルホサイド、エチレングリコール、ブタンジオールから選択される1種または2種以上のものを用いることが好ましい。
The vitrified cryopreservation solution preferably contains a cell membrane permeable cryoprotectant and a cell membrane impermeable cryoprotectant.
The vitrification cryopreservation solution of the present invention contains hydroxypropylcellulose as a cell membrane impermeable cryoprotectant. Furthermore, the vitrified cryopreservation solution of the present invention contains one or more cell membrane impermeable cryoprotectants selected from sucrose, trehalose, polyethylene glycol, and polyvinylpyrrolidone in addition to hydroxypropylcellulose. It is preferable that
In particular, the cell membrane impermeable cryoprotectant preferably contains sucrose in addition to hydroxypropylcellulose.
The cell membrane-permeable cryoprotectant used in the vitrification cryopreservation solution of the present invention should be one or more selected from glycerol, propylene glycol, dimethylsulfoside, ethylene glycol, and butanediol. Is preferred.
特に、本発明のガラス化凍結保存液は、ヒドロキシプロピルセルロースに加えて、スクロース、ジメチルスルホサイドおよびエチレングリコールを含有するものであることが好ましい。
ガラス化凍結保存液におけるスクロースの添加量は、120g/L〜200g/Lであることが好ましい。ガラス化凍結保存液におけるジメチルスルホキシド(濃度99.5%以上)の添加量は、100ml/L〜200ml/Lであることが好ましい。ガラス化凍結保存液におけるエチレングリコールの添加量は、100ml/L〜200ml/Lであることが好ましい。
そして、本発明のガラス化凍結保存液は、ゲンタマイシンのような抗生物質を含有することが好ましい。ガラス化凍結保存液における抗生物質の添加量は、25mg/L〜75mg/Lであることが好ましい。
In particular, the vitrified cryopreservation solution of the present invention preferably contains sucrose, dimethylsulfoside and ethylene glycol in addition to hydroxypropylcellulose.
The amount of sucrose added in the vitrified cryopreservation solution is preferably 120 g / L to 200 g / L. The addition amount of dimethyl sulfoxide (concentration of 99.5% or more) in the vitrified cryopreservation solution is preferably 100 ml / L to 200 ml / L. The amount of ethylene glycol added in the vitrified cryopreservation solution is preferably 100 ml / L to 200 ml / L.
The vitrified cryopreservation solution of the present invention preferably contains an antibiotic such as gentamicin. The amount of antibiotic added in the vitrified cryopreservation solution is preferably 25 mg / L to 75 mg / L.
(実施例1)
以下の組成にて、基礎液に各添加物を添加させることにより本発明のガラス化凍結保存液1Lを作製した。
ヒドロキシプロピルセルロース(日本曹達製 製品名HPC-SSL 分子量3万〜5万) 0.6g/L
スクロース(シグマ社) 171.15g/L
ジメチルスルホキシド(99.5:シグマ社) 150ml/L
エチレングリコール(シグマ社) 150ml/L
ゲンタマイシン 50mg/L
(実施例2)
以下の組成にて、基礎液に各添加物を添加させることにより本発明のガラス化凍結保存液1Lを作製した。
ヒドロキシプロピルセルロース(日本曹達製 製品名HPC-SL 分子量8万〜12万) 0.6g/L
スクロース(シグマ社) 171.15g/L
ジメチルスルホキシド(99.5:シグマ社) 150ml/L
エチレングリコール(シグマ社) 150ml/L
ゲンタマイシン 50mg/L
(実施例3)
以下の組成にて、基礎液に各添加物を添加させることにより本発明のガラス化凍結保存液1Lを作製した。
ヒドロキシプロピルセルロース(日本曹達製 製品名HPC-L 分子量10万〜17万) 0.6g/L
スクロース(シグマ社) 171.15g/L
ジメチルスルホキシド(99.5:シグマ社) 150ml/L
エチレングリコール(シグマ社) 150ml/L
ゲンタマイシン 50mg/L
(実施例4)
以下の組成にて、基礎液に各添加物を添加させることにより本発明のガラス化凍結保存液1Lを作製した。
ヒドロキシプロピルメチルセルロース(信越化学社製)0.6g/L
スクロース(シグマ社) 171.15g/L
ジメチルスルホキシド(99.5:シグマ社) 150ml/L
エチレングリコール(シグマ社) 150ml/L
ゲンタマイシン 50mg/L
(実施例5)
以下の組成にて、基礎液に各添加物を添加させることにより本発明のガラス化凍結保存液1Lを作製した。
ヒドロキシエチルメチルセルロース(信越化学社製)0.6g/L
スクロース(シグマ社) 171.15g/L
ジメチルスルホキシド(99.5:シグマ社) 150ml/L
エチレングリコール(シグマ社) 150ml/L
ゲンタマイシン 50mg/L
Example 1
1 L of vitrification cryopreservation liquid of this invention was produced by making each additive add to a base solution with the following compositions.
Hydroxypropyl cellulose (Nippon Soda product name HPC-SSL Molecular weight 30,000 to 50,000) 0.6g / L
Sucrose (Sigma) 171.15 g / L
Dimethyl sulfoxide (99.5: Sigma) 150ml / L
Ethylene glycol (Sigma) 150ml / L
Gentamicin 50mg / L
(Example 2)
1 L of vitrification cryopreservation liquid of this invention was produced by making each additive add to a base solution with the following compositions.
Hydroxypropylcellulose (Nippon Soda product name HPC-SL molecular weight 80,000-120,000) 0.6g / L
Sucrose (Sigma) 171.15 g / L
Dimethyl sulfoxide (99.5: Sigma) 150ml / L
Ethylene glycol (Sigma) 150ml / L
Gentamicin 50mg / L
(Example 3)
1 L of vitrification cryopreservation liquid of this invention was produced by making each additive add to a base solution with the following compositions.
Hydroxypropyl cellulose (Nippon Soda product name HPC-L molecular weight 100,000 ~ 170,000) 0.6g / L
Sucrose (Sigma) 171.15 g / L
Dimethyl sulfoxide (99.5: Sigma) 150ml / L
Ethylene glycol (Sigma) 150ml / L
Gentamicin 50mg / L
Example 4
1 L of vitrification cryopreservation liquid of this invention was produced by making each additive add to a base solution with the following compositions.
Hydroxypropyl methylcellulose (Shin-Etsu Chemical Co., Ltd.) 0.6g / L
Sucrose (Sigma) 171.15 g / L
Dimethyl sulfoxide (99.5: Sigma) 150ml / L
Ethylene glycol (Sigma) 150ml / L
Gentamicin 50mg / L
(Example 5)
1 L of vitrification cryopreservation liquid of this invention was produced by making each additive add to a base solution with the following compositions.
Hydroxyethyl methylcellulose (Shin-Etsu Chemical Co., Ltd.) 0.6 g / L
Sucrose (Sigma) 171.15 g / L
Dimethyl sulfoxide (99.5: Sigma) 150ml / L
Ethylene glycol (Sigma) 150ml / L
Gentamicin 50mg / L
(比較例1)
ヒドロキシプロピルセルロースを添加しない以外、実施例1と同様に行い比較例1のガラス化凍結保存液1Lを作製した。
(比較例2)
ヒドロキシプロピルセルロースの代わりに、血清成分(SSS; serum substitute supplement, Irvine scientific社)をほぼ同量添加した以外、実施例1と同様に行い比較例2のガラス化凍結保存液1Lを作製した。
(Comparative Example 1)
A vitrified cryopreservation solution 1L of Comparative Example 1 was prepared in the same manner as in Example 1 except that hydroxypropylcellulose was not added.
(Comparative Example 2)
A vitrified cryopreservation solution 1L of Comparative Example 2 was prepared in the same manner as in Example 1, except that almost the same amount of serum component (SSS; serum substitute supplement, Irvine scientific) was added instead of hydroxypropylcellulose.
(実験)
ウシ卵子を体外成熟培養後、実施例1ないし5,比較例1および2のガラス化凍結保存液を用いて、卵子をガラス化保存し、それぞれ、解凍後、形態的判定により生存性を評価、比較した。
比較例1の無添加ガラス化保存液での生存率は87%であったが、実施例1ないし5および比較例2のガラス化保存液では、100%生存率が得られた。
以上の結果から、食品、医療分野で安全な添加物として使用されているヒドロキシプロピルセルロースが、卵子ガラス化保存におけるガラス化液の血清由来成分の代替物質として利用できることがわかった。
(Experiment)
After in vitro maturation culture of bovine eggs, the vitrified cryopreservation solutions of Examples 1 to 5 and Comparative Examples 1 and 2 were used to preserve vitrified eggs, and after thawing, respectively, the viability was evaluated by morphological determination. Compared.
The survival rate in the additive-free vitrification storage solution of Comparative Example 1 was 87%, but in the vitrification storage solutions of Examples 1 to 5 and Comparative Example 2, 100% survival rate was obtained.
From the above results, it was found that hydroxypropylcellulose, which is used as a safe additive in the food and medical fields, can be used as a substitute for the serum-derived component of the vitrification solution in egg vitrification preservation.
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