ヒストン乳化による遺伝子発現の代謝調節
Di Zhang1, Zhanyun Tang2, He Huang1,3
1Ben May Department for Cancer Research, The University of Chicago, Chicago, IL, USA.
Nature
|October 25, 2019
まとめ
代謝作用で知られている乳酸は,表遺伝的変容剤としても作用します. 乳酸由来ヒストンの乳化が 遺伝子転写を直接刺激し 細胞のプロセスや癌のような病気に関する 新たな洞察を明らかにします
科学分野:
- 生物化学
- エピジェネティクス
- 細胞生物学
背景:
- ワーブルグ効果は,がんにおける乳酸の産生の増加を記述し,新生病や症などの疾患と関連しています.
- 乳酸は主にエネルギー源と代謝副産物として知られているが,代謝以外の機能はほとんど知られていない.
- 乳酸の多様な役割を理解することは,様々な病理学的状態を理解するために不可欠です.
研究 の 目的:
- 細胞過程における乳酸の非代謝的機能を調査する.
- エピジェネティック・モディファイヤーの役割を探るため
- 乳酸が遺伝子転写に影響を与えるメカニズムを解明する.
主な方法:
- 人間とマウスの細胞の核ヒストンの乳化部位を特定する.
- 低酸素と細菌の誘発下での糖分解による乳酸生成の誘導
- バクテリアの曝露中のM1マクロファージにおけるヒストン乳化ダイナミクスの分析,アセチル化と比較.
主要な成果:
- ヒストンライシン残基の乳酸塩誘発は表遺伝的変化として特定された.
- ヒトとマウスの細胞で核ヒストンの28の乳化部位が特定されました.
- ヒストンの乳酸化は,低酸素と細菌の挑戦によって誘発され,遺伝子転写の前駆体として作用した.
- ヒストンの乳化は,M1マクロファージにおけるアセチル化と比較して異なる時間動態を示している.
- 末期M1マクロファージの極化におけるヒストンの乳化が増加すると,Arg1のようなホメオスタシスおよび創傷治癒遺伝子が上調される.
結論:
- ヒストンの乳酸塩誘導はクロマチンの遺伝子転写を直接刺激する.
- M1マクロファージの内生的な"乳酸時計"は,細菌の挑戦中にホメオスタシスのための遺伝子発現を調節する.
- ヒストンの乳酸化は,感染症や癌を含む生理学および疾患における乳酸の機能に関する新しい視点を提供します.
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