転写因子制御回路を人間の基本状態の多能性へとリセットする
Yasuhiro Takashima1, Ge Guo2, Remco Loos3
1Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK; PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
Cell
|September 13, 2014
まとめ
研究者らは,人間の幹細胞をNANOGとKLF2.2を発現させることで,基底状態に成功裏に再プログラムした. この再配線は,自己再生と安定性を高め,潜在的な治療用途のためにマウス胚性幹細胞 (ESC) を模倣します.
科学分野:
- 幹細胞生物学 幹細胞生物学とは
- エピジェネティクス エピジェネティクス
- 分子遺伝学 分子遺伝学
背景:
- 人間の多能幹細胞 (hPSC) は,異なった転写因子ネットワークにより,マウスのESCと異なる.
- hPSCにおける安定した基底状態の多能性を達成することは,再生医療にとって極めて重要です.
研究 の 目的:
- 人間の細胞で機能的な基底状態の多能性回路を設計する.
- 基底状態の多能性誘導の基礎となる分子機構を調査する.
主な方法:
- ネットワーク再配線を開始するために,NANOGとKLF2の一時的な表現.
- リセット状態を維持するために,ERKとタンパク質キナーゼC経路の阻害.
- 自己再生,分化可能性,代謝,DNAメチル化,およびトランスクリプトームの分析.
主要な成果:
- 短期的なNANOGとKLF2発現はhPSCを基底状態に戻すのに成功した.
- 特定のシグナル伝達経路の阻害は,トランスゲン独立の再配線状態を維持した.
- リセット細胞は,自己再生能力,安定性,ESCに似た代謝プロファイルが向上した.
- DNAメチル化とトランスクリプトーム再調整の世界的な減少が観察されました.
- 基本状態の転写因子 (TFCP2L1,KLF4) は,リセット状態を維持するために重要でした.
結論:
- 人間の細胞に基底状態の多能性のための機能制御回路を設置し,拡散することは可能である.
- このアプローチは,研究と治療のためのより堅牢でESCのような多能細胞を生成するための経路を提供します.
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