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人間の胚性幹細胞との融合後の体細胞の核再プログラム
Chad A Cowan1, Jocelyn Atienza, Douglas A Melton
1Howard Hughes Medical Institute, Harvard Stem Cell Institute, Department of Molecular and Cellular Biology, Harvard University, 7 Divinity Avenue, Cambridge, MA 02138, USA.
まとめ
人間の胚性幹細胞は,体細胞核を再プログラムし,胚性特性を有するハイブリッド細胞を作り出すことができます. この画期的な発見は,細胞の再プログラムメカニズムを研究するための新しいシステムを提供します.
科学分野:
- 幹細胞生物学 幹細胞生物学とは
- 細胞を再プログラムする.
- 発達生物学 発達生物学とは
背景:
- ソマティック細胞の核移転は,通常,再プログラムするために卵細胞を使用します.
- 人間の胚性幹細胞 (hESCs) は,核再プログラムのための潜在的な代替案を提供します.
研究 の 目的:
- 人間の体内核を再プログラムするために卵細胞の代替品としてhESCの可能性を調査する.
- その結果生じるハイブリッドセルを特徴付け,再プログラミング効率を評価する.
主な方法:
- 人体繊維芽細胞とhESCの融合により,ハイブリッド細胞が生成される.
- ハイブリッド細胞の特徴の評価 (DNA含有量,形態,成長率,抗原発現).
- インビトロおよびインビボの微分化アッセイ.
- ゲノム全体の転写活動,レポーター遺伝子活性化,アレル固有の遺伝子発現,DNAメチレーションの分析.
主要な成果:
- hESCのような性質を示す安定したテトラプロイドハイブリッド細胞を成功裏に生成しました.
- ハイブリッド細胞からの3つの胚性生殖層全域で差別化の可能性を示した.
- 徹底した分子解析により,体ゲノムの胚性状態への再プログラムが確認されました.
結論:
- hESCは,体細胞核の転写状態を効果的に再プログラムすることができます.
- このhESCベースのシステムは,細胞の再プログラミングのメカニズムを調査するための新しいプラットフォームを提供します.
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