HDAC4は,シナプス性可塑性と記憶に不可欠な転写プログラムを管理する
Richard Sando1, Natalia Gounko2, Simon Pieraut2
1Department of Cell Biology, The Scripps Research Institute, La Jolla, CA 92037, USA; The Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA; The Kellogg School of Science and Technology, The Scripps Research Institute, La Jolla, CA 92037, USA.
Cell
|November 13, 2012
まとめ
ヒストン脱酸化酵素4 (HDAC4) は,シナプス性可塑性および記憶のための遺伝子を調節する. 精神障害に関連した変異型は,脳の機能を損なっており,HDAC4を強調しています.
科学分野:
- 神経科学は神経科学である.
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- ニューロンの活動は,脳の発達と機能に不可欠な遺伝子発現を形作ります.
- ニューロンの活動と遺伝子調節を結びつける分子機構は完全に理解されていません.
- ヒストン脱酸化酵素 (HDACs) は,様々な細胞プロセスに関与する重要な表遺伝子調節因子である.
研究 の 目的:
- 神経細胞の可塑性および記憶におけるヒストン脱酸化酵素4 (HDAC4) の役割を調査する.
- HDAC4がシナプス機能に影響を与える分子メカニズムを解明する.
- 精神障害に関連する特定のHDAC4アレルの脳機能への影響を調べる.
主な方法:
- ニューロン刺激に対する反応として,核と細胞質の間のHDAC4のシャトルを研究した.
- HDAC4とクロマチンとの相互作用と,NMDA受容体によるHDAC4の調節を調査した.
- HDAC4の転写標的とシナプス成分におけるその役割を分析した.
- 精神障害に関連するアレルを模倣する変異を携えたマウスモデルを使用しました.
主要な成果:
- HDAC4の核インポートとクロマチンの結合は,NMDA受容体の活性によって否定的に調節されます.
- 核のHDAC4は,中央シナプスの形成と機能に不可欠な遺伝子を抑制し,シナプスの強さに影響を与えます.
- メンタル・リタデーションに関連した,機能増強のHDAC4抑制剤が,トランスクリプションとシナプス伝送を妨害します.
- 変異したHDAC4アレルを持つマウスは,神経伝達,空間学習,および記憶の欠陥を示します.
結論:
- HDAC4は,神経細胞活動とシナプス可塑性および記憶の調節の間の重要な分子リンクです.
- 機能不全のHDAC4,特に精神障害に関連した変異形態は,重要な認知およびシナプス欠陥につながる.
- これらの発見は,経験に依存する脳の可塑性の重要なメカニズムと,認知機能におけるHDAC4の特定の生物学的な役割を明らかにします.
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