核受容体コアプレッサーとヒストン脱酸化酵素3は,昼間の代謝生理学を支配する
Theresa Alenghat1, Katherine Meyers, Shannon E Mullican
1Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA.
Nature
|November 28, 2008
まとめ
ネズミのNcor1-Hdac3の相互作用を妨害すると,昼夜リズムと代謝に影響されます. この表遺伝的調節は,エネルギーバランスと正常な生理学的機能の鍵です.
科学分野:
- エピジェネティクス エピジェネティクス
- クロノバイオロジーはクロノバイオロジーを用います.
- メタボリック生理学
背景:
- シルカディアンリズムには,ヒストンアセチル化のようなクロマチンの改変によって調節されるリズム的な遺伝子発現が含まれます.
- 核受容体コアプレッサー1 (Ncor1) はヒストン脱酸化酵素3 (Hdac3) を活性化させ,クロマチンの改造における重要な酵素である.
- Ncor1は生命にとって不可欠であり,成人の生理学とHdac3の調節における特定の役割は不明である.
研究 の 目的:
- 成人哺乳類におけるNcor1-Hdac3相互作用の生理学的重要性を調査する.
- この相互作用を妨害すると,昼間の行動と代謝調節に与える影響を判断する.
主な方法:
- ネズミにおけるNcor1-Hdac3相互作用の遺伝的障害.
- 昼間の行動パターンの分析.
- 体組成,インスリン感受性,エネルギー消費を含む代謝パラメータの評価.
- 時計と代謝遺伝子の遺伝子発現分析.
主要な成果:
- ネズミのNcor1-Hdac3複合体の特定の遺伝的障害は,異常な時計遺伝子調節と異常な昼夜行動をもたらしました.
- Ncor1-Hdac3の相互作用が妨げられたマウスは,体重が減り,インスリン感受性が高まり,エネルギー消費が増加した.
- 機能的なNcor1-Hdac3複合体の喪失は,代謝遺伝子の振動パターンを変化させ,代謝遺伝子の持続的な増加を引き起こすのではなく,変化させた.
結論:
- Ncor1-Hdac3複合体は,昼夜リズムと代謝生理学の表遺伝的調節に不可欠である.
- 代謝の循環調節は,正常なエネルギーバランスの維持に不可欠です.
- Ncor1媒介によるHdac3の活性化は,昼夜と代謝経路を統合する節点である.
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