mTOR依存のシナプス形成は,NMDAアンタゴニストの急速な抗うつ効果の基礎となっている

Nanxin Li¹, Boyoung Lee, Rong-Jian Liu

¹Laboratory of Molecular Psychiatry, Center for Genes and Behavior, Department of Psychiatry, Yale University School of Medicine, 34 Park Street, New Haven, CT 06508, USA.

Science (New York, N.Y.)

|August 21, 2010

まとめ

ケタミンは,ラパミシン (mTOR) 経路の哺乳類の標的を活性化して,新しいシナプスの成長を促すことで,うつ病の症状を急速に逆転させます. この経路はケタミンにとって極めて重要です.

科学分野:

神経科学は神経科学である.
薬理学薬理学とは
細胞生物学細胞生物学

背景:

標準的な抗うつ剤は,有効性のために数週間から数ヶ月を必要とします.
ケタミンは,治療に抵抗性のあるうつ病において,迅速な抗うつ効果を示します.
ケタミンの急速な作用の正確なメカニズムは不明である.

研究の目的:

ケタミンの迅速な抗うつ効果の基礎となる分子機構を調査する.
ケタミンの作用におけるラパミシン (mTOR) 経路の哺乳類の標的の役割を調査する.

主な方法:

ネズミにケタミン投与.
前頭前皮質におけるシナプスシグナル伝達タンパク質とシナプス形成の分析.
鬱病モデルにおける行動反応の評価.
mTORの信号経路が遮断されている.

主要な成果:

ケタミンはmTOR経路を迅速に活性化させました.
mTORの活性化により,シナプスタンパク質の増加と前頭前皮質における新しい脊髄シナプスが起こりました.
mTORシグナル伝達を遮断すると,ケタミンのシナプトゲネシスと抗うつ剤の行動効果は廃止される.
ケタミンの効果は,ストレスに起因するシナプス欠陥を相殺します.

結論:

ラパマイシン (mTOR) 経路の哺乳類の標的は,ケタミンの迅速な抗うつ効果を媒介する.
ケタミンは,シナプトゲネシスを促進し,ストレスに関連するシナプス損傷を相殺します.
mTOR経路を標的にすることは,迅速に作用するうつ病治療のための潜在的な戦略を提供します.

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