プラリポテンシーへの経路の全ゲノム幅の特徴化
Samer M I Hussein1, Mira C Puri2, Peter D Tonge1
1Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario M5G 1X5, Canada.
Nature
|December 16, 2014
まとめ
細胞の再プログラムを理解することは鍵です. この研究は,再プログラム因子レベルと表遺伝的変化の影響で,細胞が多能性に到達するために取る明確な分子経路を明らかにし,異なる安定した細胞状態につながります.
科学分野:
- 細胞および分子生物学
- 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
背景:
- 多能性への体細胞再プログラミングは,分子レベルではまだ完全に理解されていません.
- 誘導された多能性における動的変化の包括的な特徴づけは欠けている.
研究 の 目的:
- マウスの胚性線維芽細胞から誘発性多能細胞への再プログラミングプロセスの詳細な分子記述を提供するため.
- 再プログラミング中の独特の遺伝子発現,エピジェネティックシグネチャー,細胞運命を明らかにする.
主な方法:
- 広範なトランスクリプトミック,エピジェノミック,プロテオミックデータセットの生成.
- マルチオミックスのデータを統合分析して,再プログラミングの経路をマッピングする.
- ヒストンH3ライシン27トリメチル化 (H3K27me3) ダイナミクスとDNAメチル化パターンの調査.
主要な成果:
- 細胞は,再プログラム中に異なる分子状態を通過する.
- 再プログラミングは,トランスゲンに依存した状態と,トランスゲンに依存しない状態の多能性状態に分裂する.
- 初期のイベントには,H3K27me3の損失を通じたクロマチンの開口が含まれます;トランスゲンレベルは,ESCのようなまたは代替的な多能性宿命の獲得を決定します.
結論:
- この研究は,体細胞の再プログラムに関する包括的な分子ロードマップを提供します.
- 再プログラミングの結果は,転写因子レベルと表遺伝的変化に敏感である.
- データは,さらなる研究のためにプロジェクト・グランディオース・ポータルを通じてアクセスできます.
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