漏れのある神経ライオノジン受容体の役割 ストレス誘発の認知機能不全
Xiaoping Liu1, Matthew J Betzenhauser, Steve Reiken
1Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA.
Cell
|September 4, 2012
まとめ
慢性的なストレスは,脳のRyR2チャネルの機能不全を引き起こし,記憶と学習を損なう. これらのチャネルをS107または遺伝子組み換えで安定させると,認知機能が回復し,RyR2が治療目標であると示唆される.
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.
- 薬理学 薬理学とは
背景:
- 2型ライオノジン受容体/カルシウム放出チャネル (RyR2) は脳に豊富に存在する.
- 慢性的なストレスは,ニューロンのcAMP信号伝達経路を活性化します.
- ニューロンのRyR2は,ストレス誘発の認知機能不全に関与しています.
研究 の 目的:
- 慢性的なストレス誘発性認知機能障害におけるニューロンのRyR2の役割を調査する.
- ストレス関連の認知障害の治療標的を特定する.
主な方法:
- マウリンの慢性拘束ストレスモデル.
- RyR2のリン酸化,酸化,およびcalstabin2の相互作用の評価.
- 学習,記憶,長期増強 (LTP) を含む認知機能の評価.
- RyR2-安定化化合物S107の投与と RyR2.2の遺伝子操作
主要な成果:
- 慢性的なストレスは,PKAのリン酸化,酸化,およびcalstabin2の枯渇を含むニューロンのRyR2の再構築を誘発し,細胞内カルシウム漏れを引き起こします.
- ストレスに起因する認知機能の低下と海馬のLTPの低下が観察されました.
- S107の経口投与またはRyR2 PKAのリン酸化部位の遺伝的アブレーションにより,認知機能とLTPが回復しました.
結論:
- ニューロンのRyR2の再構築は,ストレス誘発の認知機能不全に大きく寄与する.
- リーキーなRyR2チャネルは,慢性的なストレスに関連した認知障害の治療のための潜在的な治療目標です.
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