JP5773347B2 - 血液細胞の凍結保存剤 - Google Patents
血液細胞の凍結保存剤 Download PDFInfo
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Description
凍害防止剤としてジメチルスルホキシド(DMSO)またはN−メチルアセトアミド(NMA)を用い、細胞保護剤としてヒドロキシエチルスターチ(HES)およびヒト血清アルブミン(Alb)を用いて、滅菌水中に以下の成分を含む凍結保存剤を調製した。なお、濃度は細胞と混合したときの最終濃度として表す。
5% DMSO + 0.9% NaCl + 6% HES + 4% Alb
1-8% NMA + 0.9% NaCl+ 6% HES + 4% Alb
NMAとDMSOの毒性を比較するために、次の凍結保存剤を調製した(最終濃度)。
5% DMSO + 0.9% NaCl + 6% HES + 4% Alb
5% NMA + 0.9% NaCl + 6% HES + 4% Alb
ヒト血液細胞株RPMI8226を凍結保存剤に加え、37℃でインキュベーションし、トリパンブルーを用いて1時間ごとに生細胞数をカウントして、細胞の生存率の経時変化を観察した。3回の実験の平均値を図2に示す。
マウス骨髄細胞およびヒト末梢血幹細胞を用いて、本発明の凍結保存剤の効果を調べた。マウス骨髄細胞はマウスを解剖して骨髄を採取し、ただちに凍結保存液に加えた。凍結保存液の組成物は次のとおりである(最終濃度)。
5% DMSO + 0.9% NaCl + 6% HES + 4% Alb
5% NMA + 0.9% NaCl + 6% HES + 4% Alb
ヒト末梢血幹細胞は、以前に採取して凍結保存されていた幹細胞を解凍して用いた。末梢血幹細胞は、G-CSF(顆粒球コロニー刺激因子)投与等で刺激した状態のヒト末梢血から採集した。採集は、血管から採血した血液を連続血液成分採血装置中で体外循環の回路にて遠心分離し、造血幹細胞を多く含む単核球層を採取した。造血幹細胞は、濃縮されて血漿に浮遊した単核球浮遊液として採集バッグ中に採集されるので、細胞濃度を調整して保存した。なお、細胞有益実験への転用に関しては被験者から同意を取得済みである。
これらの細胞を実施例1と同様にして冷却し、−80℃で24時間凍結保存した後、解凍して細胞の生存率を調べた。結果を下記の表に示す。
実施例3と同様にして、マウス骨髄細胞およびヒト末梢血幹細胞を凍結保存剤に加えて凍結した。−80℃で1週間凍結保存した後、解凍し、メチルセルロ−ス培地上(mouse GF M3434、human GF H4044))にて37℃で培養した。2週間後、出現したコロニー数をカウントした。結果を下記の表に示す。
4%のヒト血清アルブミンを含む生理食塩水に、ジメチルスルホキシド(DMSO)、N−メチルアセトアミド(NMA)、ヒドロキシエチルスターチ(HES)およびデキストラン(DEX)を下記の表に示す濃度で加えて凍結保存剤を調製した(濃度は細胞と混合したときの最終濃度で示す)。実施例4と同様にして、マウス骨髄細胞を凍結後−80℃で一週間保存し、解凍後2週間後の骨髄細胞のコロニー形成数を比較した。また、骨髄を摘出してから凍結保存剤中で室温で45分間保持した後に凍結した実験も行った。これは凍結保存剤の細胞に対する毒性を観察するためである。5%NMA単独では、5%DMSOより解凍後のコロニー形成数が低かった。しかし、細胞保護剤として、DEXかHESのいずれかを入れると細胞増殖率が非常に高くなった。なお、解凍後の生存率は60%から70%の間であった。
Claims (4)
- 3〜8%の濃度(最終濃度)のN−メチルアセトアミドと、1〜10%の濃度(最終濃度)のデキストランを含む血液細胞の凍結保存剤(DMSOを含むものを除く)。
- 血液細胞は造血幹細胞である、請求項1記載の凍結保存剤。
- 血液細胞を請求項1記載の凍結保存剤とともに凍結することを含む、血液細胞の凍結保存方法。
- 血液細胞は造血幹細胞である、請求項3記載の凍結保存方法。
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WO2024024892A1 (ja) | 2022-07-28 | 2024-02-01 | 公立大学法人山陽小野田市立山口東京理科大学 | 凍結保存用の組成物、凍結保存方法、及び凍結した細胞又は生体組織 |
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CN103827303B (zh) | 2011-09-26 | 2021-10-22 | 普瑞阿那利提克斯有限公司 | 细胞外核酸的稳定化和分离 |
US11021733B2 (en) | 2011-09-26 | 2021-06-01 | Qiagen Gmbh | Stabilization and isolation of extracellular nucleic acids |
EP4397770A1 (en) | 2011-09-26 | 2024-07-10 | PreAnalytiX GmbH | Stabilisation and isolation of extracellular nucleic acids |
EP2900834B1 (en) | 2012-09-25 | 2016-11-09 | Qiagen GmbH | Stabilisation of biological samples |
US9943545B2 (en) * | 2013-03-15 | 2018-04-17 | Fate Therapeutics, Inc. | Stem cell culture media and methods of enhancing cell survival |
CN105283550A (zh) * | 2013-03-18 | 2016-01-27 | 凯杰有限公司 | 生物样品的稳定化 |
EP2976426A1 (en) | 2013-03-18 | 2016-01-27 | Qiagen GmbH | Stabilization and isolation of extracellular nucleic acids |
GB201306810D0 (en) * | 2013-04-15 | 2013-05-29 | Cells4Life Group Llp | Methods of cell separation |
US11203777B2 (en) | 2015-11-20 | 2021-12-21 | Qiagen Gmbh | Method of preparing sterilized compositions for stabilization of extracellular nucleic acids |
CN110896946A (zh) * | 2019-12-30 | 2020-03-24 | 贵州汉氏联合生物技术有限公司 | 一种造血干细胞冻存液及造血干细胞冻存方法 |
CN116420714A (zh) * | 2023-02-17 | 2023-07-14 | 浙江大学 | 一种人血液病样本的冻存优化方法及利用人血液样本建立pdx动物模型的方法 |
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JP2942822B2 (ja) * | 1998-02-09 | 1999-08-30 | 農林水産省家畜改良センター所長 | 生殖細胞の凍結保存方法 |
JP2000201672A (ja) * | 1999-01-11 | 2000-07-25 | Asahi Medical Co Ltd | 有核細胞の凍結保存用組成物 |
TWI349567B (en) * | 2003-10-10 | 2011-10-01 | Asahi Kasei Medical Co Ltd | A method of preparation of cell concentrates,a method of lyophilization storage of cells,a cell composition,and a cell lyophilized product |
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