気分を調節する. GABA/グルタミン酸の同時放出はハベヌラ出力を制御し,抗うつ薬による治療によって変化します
Steven J Shabel1, Christophe D Proulx2, Joaquin Piriz3
1Center for Neural Circuits and Behavior, Department of Neuroscience and Section of Neurobiology, Division of Biology, University of California at San Diego, San Diego, CA, USA. sshabel@gmail.com.
Science (New York, N.Y.)
|September 20, 2014
まとめ
研究者らは,ベースガンリアからのGABAとグルタミン酸の同時放出が,横面のヘブンヌラの活動を調節することを発見しました. この阻害信号は,うつ病のモデルで変化し,抗うつ剤によって回復され,新しい治療目標を提供します.
科学分野:
- 神経科学は神経科学である.
- 神経生物学 神経生物学とは
- 分子精神医学は分子精神医学である.
背景:
- 横側ヘブンヌラ (LHb) は,ネガティブな経験の処理に不可欠であり,その過活動性はうつ病と相関しています.
- LHbへの刺激性インプットの増加はうつ病に関連しているが,抑制性伝播の役割は不明である.
研究 の 目的:
- LHb活動の調節における抑制性神経伝達,特にガンマ-アミノバター酸 (GABA) の役割を調査する.
- 鬱病の文脈における基礎性ガンジア-LHbシナプスにおけるGABAとグルタミン酸シグナル伝達のバランスを調査する.
主な方法:
- ネズミのモデルにおける電気生理学的記録.
- LHb.へのベースガンリアからのLHb.への入力からの神経伝達物質の共放出の分析.
- うつ病モデルおよび抗うつ剤治療後のGABA/グルタミン酸シグナリングバランスの評価.
主要な成果:
- ガンマ-アミノバター酸 (GABA) は,ベースリンパ節の入力からグルタミン酸と同時に放出され,LHbの活性を抑制するように作用することを発見しました.
- 鬱病モデルにおいて,GABAergicシグナリングの減少へのシフトが観察されました.
- 抗うつ剤の治療は,このシナプスでGABAergicシグナル伝達を増加させることを発見しました.
結論:
- GABAとグルタミン酸の同時放出は,LHbの活動を制御する重要なメカニズムです.
- この共同放出の調節不良,特にGABAの減少は,うつ病と関連しています.
- この抑制的伝播を調節することは,気分障害に対する潜在的な治療戦略です.
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