複雑な媒介性ポストシナプス阻害の特定
Akiyoshi Uezu1, Daniel J Kanak1, Tyler W A Bradshaw1
1The Department of Cell Biology, Duke University Medical School, Durham, NC 27703, USA.
Science (New York, N.Y.)
|September 10, 2016
まとめ
研究者たちは 脳機能に不可欠な 阻害性シナプスを制御する 新しいタンパク質を発見しました 一つのタンパク質であるInSyn1の減少はシナプス阻害を妨害し,脳の興奮性を高め,神経発達障害の役割を示唆しました.
科学分野:
- 神経科学
- 分子生物学
- シナプスの可塑性
背景:
- 阻害性シナプスは,ポストシナプス・ハイパーポラライゼーションによるニューロン活動の調節に不可欠である.
- 抑制性ポストシナプスの正確な分子組成と規制メカニズムはよく理解されていません.
研究 の 目的:
- 阻害性ポストシナプスを構成する新しいタンパク質を特定する.
- これらのタンパク質がシナプス阻害と神経刺激性における機能的役割を明らかにする.
主な方法:
- 阻害性ポストシナプスタンパク質を検出するために,in vivo 化学遺伝的近接ラベル技術を使用した.
- タンパク質の識別とネットワーク分析のための定量質スペクトロメトリーを使用した.
- 新種のタンパク質であるInSyn1の機能を評価するためにCRISPR媒介の遺伝子枯渇を用いた.
主要な成果:
- 抑制性ポストシナプスタンパク質の広範なネットワークを特定し,以前は特徴づけられていなかったものが多く含まれています.
- InSyn1の減少は,ポストシナプス阻害部位の減少と,ミニチュア阻害電流の減少をもたらした.
- InSyn1の減少に伴い,ヒポカンプスの興奮性の増加が観察されました.
結論:
- 阻害性ポストシナプス機能を調節する 新しいタンパク質の多様性を発見しました
- InSyn1は阻害性シナプスの完全性と機能を維持する上で重要な役割を果たします.
- これらの発見は,特定されたタンパク質と脳の発達障害の病理生理学との潜在的な関連を示唆しています.
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