Jmjd3はINK4a/Arfの発現をアップレギュレーションし,UbiquitinationのためにPHF20をターゲットにすることで再プログラミングを阻害します
Wei Zhao1, Qingtian Li, Stephen Ayers
1Center for Inflammation and Epigenetics, The Methodist Hospital Research Institute, Houston, TX 77030, USA.
Cell
|March 5, 2013
まとめ
Jmjd3は,誘発性多能幹細胞 (iPSC) に細胞の再プログラミングを否定的に調節する. その欠如は,iPSCの生成を強化し,その存在はそれを阻害し,新しいJmjd3-PHF20規制軸を明らかにします.
科学分野:
- エピジェネティクス エピジェネティクス
- 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:
- 誘発性多能幹細胞 (iPSC) を生成するための体細胞再プログラムには,重大な表遺伝的変化が伴う.
- この過程における表遺伝子調節体の正確な役割とメカニズムは,完全に解明されていません.
研究 の 目的:
- ソマティック細胞の再プログラミングを調節する新しい表遺伝的要因を特定し,特徴づけること.
- Jmjd3がiPSCの生成に影響を与える分子メカニズムを解明する.
主な方法:
- Jmjd3欠乏症および野生型のマウスの胚性線維芽細胞 (MEF) の生成と分析.
- 子宮外Jmjd3発現によるiPSCコロニー形成の評価.
- ユビキチネーションアッセイを含むPHF20とTrim26とのJmjd3の相互作用の調査.
- 再プログラム実験におけるPHF20欠乏のMEFの分析.
主要な成果:
- Jmjd3は,再プログラミングの強力な負の調節剤として作用し,Jmjd3が不足しているMEFは,より多くのiPSCコロニーを生み出します.
- Jmjd3はヒストン脱甲基酶に依存するメカニズムと独立するメカニズムの両方を通じて再プログラミングを阻害する.
- Jmjd3-PHF20軸は,PHF20の欠乏が,Jmjd3がノックダウンされても,iPSCの生成を防ぐため,非常に重要です.
結論:
- Jmjd3は,これまで認識されていない細胞再プログラミングの負の調節体です.
- Jmjd3-PHF20軸は,iPSC発電の効率を制御する上で重要な役割を果たしています.
- この研究は,再プログラミングの表遺伝的調節に関する新しい分子洞察を提供します.
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