JP2013530721A - 羊膜由来間葉幹細胞培養用の培地組成物及びこれを利用した羊膜由来間葉幹細胞の培養方法 - Google Patents
羊膜由来間葉幹細胞培養用の培地組成物及びこれを利用した羊膜由来間葉幹細胞の培養方法 Download PDFInfo
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Abstract
Description
そこで、本発明者らは、分化能を維持しながら、羊膜由来幹細胞の増殖率を向上させることができる方法を開発しようと鋭意努力した結果、DMEM−P及びKSFM−Pを混合した培地において羊膜由来幹細胞を培養する場合、分化能を維持しながら、細胞増殖能を向上させることができることを確認し、本発明を完成した。
本発明の他の目的は、前記培養培地を利用して、間葉幹細胞を培養する方法を提供することにある。
さらに本発明は、前記培地組成物において羊膜由来幹細胞を培養することを特徴とする間葉幹細胞の培養方法を提供する。
実験に必要な羊膜組織は胎盤から分離し、分離した組織は抗生剤が含まれている生理食塩水、またはDMEM(Dulbecco modified Eagle medium)培地に入れて研究室まで運搬した。
前記取得した羊膜由来間葉幹細胞を、DMEM−P(表1)及びKSFM−P(表3)培地の混合培地を表4に記載された混合比で混合した培地を用いて、T175フラスコに1.0×106細胞を分株して37℃で4日間培養を行い、培地は二日に一回ずつ交換した。培養3日及び4日目の細胞写真を各々図1及び図2に示した。
その結果、表4、図1及び図2に示したように、DMEM−P培地とKSFM−P培地を単独で用いた培地でより、DMEM−P培地とKSFM−P培地を混合した培地で培養された場合、羊膜由来幹細胞がずっと速く、培養4日目の細胞数においても、顕著に多いことが確認された。
表面抗原発現の柔細胞分析(Flow cytometry analysis)
実施例2で混合培地で培養された羊膜由来間葉幹細胞を表面CDシリーズ抗原マーカーでキャラクタライゼーションした。CD29(単核球マーカー)、CD31(内皮細胞及び幹細胞マーカー)、CD34(造血幹細胞マーカー)、CD44、CD45(PTPR,ASV,Leukocyte marker)、CD73をFACS分析に適用した。
実施例1で培養された細胞を各々1.0×106細胞/T175フラスコ濃度で継代培養して、P1及びP2世代の増殖能を確認した。
培養は、実施例1の培養方法と同様の条件で行った。
実施例2と同様の方法で、DMEM−P培地を単独で用いて継代培養したP1及びP2と、DMEM−PとKSFM−P培地を66:33で混合した培地を利用して継代培養したP1及びP2の免疫学的特性を確認した結果、各グループの羊膜由来間葉幹細胞はいずれもCD29、CD44、CD73、CD90、CD105及びHLA−ABCに対して陽性の免疫学的特性を示し、CD31、CD34、CD45及びHLA−DRに対して陰性の免疫学的特性を示した。
実施例1で取得したDMEM−P単独培地、及びDMEM−P/KSFM−P混合培地で培養された羊膜由来間葉幹細胞を骨形成誘導培地(Nonhematopoietic OsteoDiff Medium、Miltenyi Biotec)で18日間培養(37℃、5%CO2、培地交換周期:3〜4日)して、間葉幹細胞を骨細胞に分化誘導させ、2日毎に分化培地を新しく取り換えた。骨細胞への分化は正常酸素状態及び低酸素状態(1〜5%)に分けて実施し、各分化条件を表6に示した。
Claims (8)
- 基本培地、L−アスコルビン酸2−リン酸、牛胎児血清、塩基性線維芽細胞成長因子、非必須アミノ酸、インスリン、N−アセチル−L−システイン、塩化カルシウム及びヒドロコルチゾンを含有する間葉幹細胞培養用の培地組成物。
- 前記基本培地は、DMEM−HG、Defined Keratinocyte−SFM、及びこれらの混合物からなる群から選択されることを特徴とする請求項1に記載の間葉幹細胞培養用の培地組成物。
- 0.05〜1mMのアスコルビン酸2−リン酸、2〜20%の牛胎児血清、1〜100ng/mLの塩基性線維芽細胞成長因子、1〜100μL/mLの非必須アミノ酸、0.1〜100μg/mLのインスリン、0.2〜20mMのN−アセチル−L−システイン、0.01〜1mMの塩化カルシウム、及び5ng/mL〜1μg/mLのヒドロコルチゾンを含有することを特徴とする請求項1に記載の間葉幹細胞培養用の培地組成物。
- 前記非必須アミノ酸は、グリシン、アラニン、アスパラギン、アスパラギン酸、グルタミン酸、プロリン及びセリンからなることを特徴とする請求項1または請求項3に記載の間葉幹細胞培養用の培地組成物。
- 前記非必須アミノ酸は、750mg/Lのグリシン、890mg/Lのアラニン、1,320mg/Lのアスパラギン、1,330mg/Lのアスパラギン酸、1,470mg/Lのグルタミン酸、1,150mg/Lのプロリン、及び1,050mg/Lのセリンからなることを特徴とする請求項4に記載の間葉幹細胞培養用の培地組成物。
- 前記間葉幹細胞は、羊膜由来の間葉幹細胞であることを特徴とする請求項1に記載の間葉幹細胞培養用の培地組成物。
- 請求項1〜3のいずれか一項に記載の培地組成物において羊膜由来幹細胞を培養することを特徴とする間葉幹細胞の培養方法。
- 前記間葉幹細胞は、羊膜由来の間葉幹細胞であることを特徴とする請求項5に記載の間葉幹細胞の培養方法。
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EP2594636A4 (en) | 2014-01-22 |
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US20130164849A1 (en) | 2013-06-27 |
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