アセチル-コア合成酵素はヒストンのアセチル化とヒポキャンパスの記憶を調節する
Philipp Mews1, Greg Donahue1, Adam M Drake1
1Epigenetics Institute, Departments of Cell and Developmental Biology, Biology, Genetics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania 19104, USA.
Nature
|June 1, 2017
まとめ
代謝酵素アセチル-コア合成酵素2 (ACSS2) は,神経細胞におけるヒストンのアセチル化を直接調節し,遺伝子発現と空間記憶に影響を与えます. この発見は細胞の代謝と 神経の可塑性と遺伝子調節を結びつけています
科学分野:
- 神経科学
- 分子生物学
- メタボリック生化学
背景:
- アセチル-CoA (アセチル共酵素A) の代謝生成はヒストンのアセチル化と遺伝子調節に関連しています.
- 神経細胞における代謝と遺伝子調節を結びつける正確なメカニズムは完全に理解されていません.
研究 の 目的:
- ニューロンヒストンのアセチル化と空間記憶におけるアセチル-コア合成酵素2 (ACSS2) の役割を調査する.
- ACSS2が遺伝子発現と神経の可塑性に影響を与える直接的なメカニズムを解明する.
主な方法:
- ACSS2の局所化と機能を観察するためのニューロン細胞培養モデル.
- 大人のマウスでの実験で,ACSS2減衰が,海馬の機能と空間記憶に与える影響を評価した.
- ACSS2調節に対するヒストンのアセチル化レベルと遺伝子発現の分析.
主要な成果:
- ACSS2は分化時にニューロン核で増加し,上位調節された遺伝子に局所することが判明した.
- 減少したACSS2レベルは,核アセチル-CoA,ヒストンのアセチル化,および神経細胞の遺伝子発現を減少させた.
- 長期空間記憶の障害と記憶に関連する遺伝子の上位調節が,海馬ACSS2衰弱のマウスで観察されました.
結論:
- ACSS2は神経細胞におけるヒストンのアセチル化を直接調節し,細胞代謝と遺伝子調節を結びつける.
- ACSS2によるクロマチンのオンサイトアセチル-CoA生成は,重要なニューロン遺伝子の転写に不可欠です.
- この研究は,代謝,遺伝子調節,神経の可塑性,そして認知機能との関係を確立しています.
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