ストレイタルマイクロRNAは,CREBシグナル伝達を通じてコカインの摂取を制御する
Jonathan A Hollander1, Heh-In Im, Antonio L Amelio
1Laboratory of Behavioral and Molecular Neuroscience, Department of Molecular Therapeutics, The Scripps Research Institute, Scripps Florida, Jupiter, Florida 33458, USA.
Nature
|July 9, 2010
まとめ
マイクロRNA-212 (miR-212) が脳内にある
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.
- 依存症の研究 依存症の研究
背景:
- コカイン中毒は,薬物使用に対するコントロールの漸進的な喪失を伴う.
- コカインの脆弱性につながる根本的な分子機構は完全に理解されていません.
研究 の 目的:
- コカイン依存の脆弱性の分子調節におけるマイクロRNA-212 (miR-212) の役割を調査する.
- コカインの効果に関連した背面のストライアタムにおけるmiR-212の影響を受けるシグナル伝達経路を解明する.
主な方法:
- コカインを長時間摂取したネズミの背筋状体におけるmiR-212濃度の分析.
- cAMP応答要素結合タンパク質 (CREB) 信号伝達経路に対するmiR-212の影響の調査.
- Raf1活動,アデニリルサイクラゼ,TORC発現に対するmiR-212の影響の評価.
主要な成果:
- コカインに長時間曝露した後の背面のストライアタムでmiR-212の上昇が観察されました.
- ストレイタル miR-212は,コカインの動機付け効果に対する感受性を低下させることが判明しました.
- miR-212は,強化されたRaf1活動を通じてCREBシグナリングを増幅し,TORC発現の増加につながります.
結論:
- ストレイタル miR-212シグナリングは,コカイン依存症の脆弱性において重要な役割を果たします.
- この研究は,脳の報酬回路におけるコカインの作用の新種の分子調節体を特定しています.
- miR-212のような非コーディングRNAを調節することで,依存症治療の新たな治療方法がもたらされます.
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