10−11 転位-2 (TET2) は,滑らかな筋肉細胞の可塑性のマスターレギュレータです
Renjing Liu1, Yu Jin, Wai Ho Tang
1Department of Internal Medicine, Yale Cardiovascular Research Center, Section of Cardiovascular Medicine (R.L., Y.J., W.T., X.Z., J.H., J.Y., K.A.M.), Department of Surgery (Cardiac Surgery) (L.Q., G.T.), and Department of Pharmacology (K.A.M.), Yale University, New Haven, CT.
Circulation
|October 1, 2013
まとめ
10−11 転位-2 (TET2) は,滑らかな筋肉細胞 (SMC) の分化の主な表遺伝子調節体である. TET2と5-hydroxymethylcytosine (5-hmC) の喪失は,血管損傷と疾患と相関し,TET2の回復は,多発症を緩和する.
科学分野:
- エピジェネティクス エピジェネティクス
- 細胞生物学 細胞生物学
- 血管生物学 血管生物学
背景:
- 滑らかな筋肉細胞 (SMCs) は,驚くべき可塑性を発揮し,生理学的プロセスには不可欠ですが,動脈硬化症のような病理に関与しています.
- MYOCDやKLF4のようなレギュレータは知られているが,SMCの可逆性差異化のための統一的な表遺伝的メカニズムは未だに曖昧である.
研究 の 目的:
- 滑らかな筋肉の細胞の可逆的な分化を制御するエピジェネティックメカニズムを特定する.
- SMCの可塑性および血管疾患におけるDNA変異酵素の役割を調査する.
主な方法:
- 人間のSMC,動脈組織,マウスモデルを使用した.
- 雇用されたTET2ノックダウンと過剰表現の研究.
- クロマチンの免疫プレシピテーションを行い,5-ヒドロキシメチルサイトシン (5-hmC) レベルを評価しました.
主要な成果:
- SMCの可塑性は,十-""の転位-2 (TET2) によって支配されます; TET2と5-hmCは,分化されていないSMCで減少します.
- TET2ノックダウンは,プロコントラクチル遺伝子 (MYOCD,SRF) を阻害し,KLF4を上調する;TET2過剰発現はSMCフェノタイプを誘発する.
- TET2はクロマチンのアクセシビリティを調節し,その喪失は血管損傷と動脈硬化症の重症度と相関しています.
結論:
- TET2は,SMCの微分化の新しく重要な主体表遺伝子調節体として特定されています.
- TET2の操作は,SMCの遺伝子発現とクロマチンの風景に影響を与え,血管疾患の治療の可能性を提供します.
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