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哺乳類の胚から多能性エピブラスト幹細胞を派生させる
I Gabrielle M Brons1, Lucy E Smithers, Matthew W B Trotter
1Department of Surgery and Cambridge Institute for Medical Research, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0XY, UK.
Nature
|June 29, 2007
まとめ
研究者らは,化学的に定義された媒介を用いてマウスとネズミの胚から新しい多能幹細胞を導いた. この発見は,種間の多能性を維持するアクティビン/ノダルシグナル伝達の保存された役割を強調しています.
科学分野:
- 発達生物学 発達生物学とは
- 幹細胞生物学 幹細胞生物学
- 比較生物学とは比較生物学である.
背景:
- 胚性幹細胞 (ES) の誘導は,マウス以外の哺乳類において,挑戦的でした.
- 人間のES細胞とマウスのES細胞は,類似の多能性にもかかわらず,維持のために異なるシグナル伝達経路を使用します.
- マウスのES細胞はLIFとBMPを必要とし,人間のES細胞はアクティビン/ノダルとFGFに依存しています.
研究 の 目的:
- 化学的に定義された媒体を用いて,移植後の哺乳類の胚から多能幹細胞を派生させ,維持する.
- 異なる種における多能性におけるアクティビン/ノダルシグナル伝達の役割を調査する.
- 幹細胞生物学における種別差異を比較するためのシステムを確立する.
主な方法:
- 植入後のマウスとラットの胚の表皮質から多能幹細胞を派生させる.
- アクティヴィンを含む化学的に定義された培養媒介を使用した.
- 採取した幹細胞の長期維持と多能性を評価した.
主要な成果:
- マウスとネズミの胚の末期エピブラストから多能幹細胞を成功裏に導出しました.
- 化学的に定義されたアクティビンを含んだ介質は,多能性の長期維持を支えた.
- 幹細胞の誘導と維持におけるアクティビン/ノダル信号伝達の進化的に保存された役割を示した.
結論:
- アクティビン/ノダルのシグナル伝達は,新型エピブラスト幹細胞の多能性の獲得と維持に不可欠です.
- エピブラスト幹細胞は,ES細胞における時的起源の差異と対して種特有の区別を探求するためのモデルを提供します.
- この研究は,哺乳類種の幹細胞研究のためのツールキットを拡張します.
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