Wdr5は,胚性幹細胞核の転写ネットワークを通じて自己更新と再プログラミングを媒介する
Yen-Sin Ang1, Su-Yi Tsai, Dung-Fang Lee
1Black Family Stem Cell Institute, Mount Sinai School of Medicine, New York, NY 10029, USA. yen-sin.ang@mssm.edu
Cell
|April 12, 2011
まとめ
WDリピートドメイン5 (Wdr5) は,Oct4.4と相互作用することによって,胚性幹細胞の自己更新を調節する. この相互作用は,多能性を維持し,体細胞を誘発された多能性幹細胞に再プログラムするために重要である.
科学分野:
- エピジェネティクスと遺伝子調節
- 幹細胞生物学 幹細胞生物学
- 分子生物学は分子生物学である.
背景:
- 胚性幹細胞 (ES) の自己再生は,複雑な転写および染色体修正ネットワークに依存しています.
- これらのネットワークとそれらの仲介要因の間の機能的相互作用は完全に理解されていません.
研究 の 目的:
- ES細胞の自己再生におけるWDリピートドメイン5 (Wdr5) の役割を調査する.
- Wdr5と多能性因子の相互作用を解明する.
- 多能性と再プログラミングの維持における協力的メカニズムを理解する.
主な方法:
- Wdr5の発現と無差別状態との相関分析.
- Oct4.4とのWdr5相互作用の実証.
- ゲノム全体にわたるタンパク質の局所化とトランスクリプトーム分析.
- 誘発性多能幹細胞 (iPS) 形成に対するWdr5要件の評価.
主要な成果:
- Wdr5は不分化状態と正に相関し,ES細胞の自己再生を調節する.
- Wdr5は,多能性転写因子Oct4.4と相互作用する.
- Oct4とWdr5.5の間に重複する遺伝子調節機能が観察されました.
- Oct4-Sox2-Nanog回路とTrithorax群 (trxG) のタンパク質は,自己再生遺伝子の調節に協力しています.
- Wdr5は,効率的なiPS細胞生成に不可欠です.
結論:
- Wdr5は,ES細胞の自己再生と多能性の主要な調節体です.
- Wdr5のようなtrxGメンバーと多能性因子を含む統合モデルは,ES細胞の同一性を維持します.
- Wdr5は,体細胞をiPS細胞に再プログラムする上で重要な役割を果たします.
関連する概念動画
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