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アストロサイト性ニューロリギンは,アストロサイト形態変異とシナプト変異を制御する
Jeff A Stogsdill1, Juan Ramirez1, Di Liu2
1Department of Cell Biology, Duke University Medical Center, Durham, North Carolina 27710, USA.
Nature
|November 10, 2017
まとめ
アストロサイト (膠質細胞) の発達はニューロンとの接触に依存し,シナプス形成に影響する. ニューロリジン2 (NL2) 欠乏症は刺激性シナプスを損なうが,抑制性シナプスを強化し,神経学的障害の役割を示唆する.
科学分野:
- 神経科学
- 細胞生物学
- グリア細胞生物学
背景:
- アストロサイトは,シナプスと相互作用する広範なプロセスを持つ膠質細胞です.
- アストロサイト形態を制御するメカニズムとシナプス接続性への影響はほとんど不明である.
研究 の 目的:
- 天体細胞の形態変異を制御するメカニズムを調査する.
- ニューロピルのアストロサイト浸透がシナプス結合に影響するかどうかを判断する.
- 神経細胞の発達とシナプス機能における神経リンの役割を解明する.
主な方法:
- ネズミの皮質で 星細胞の形態変異を研究した
- ニューロリジン (NL) 族のタンパク質 (NL1,NL2,NL3) とニューロンのニューレキシンの役割を調査した.
- アストロサイト特異的なNL2欠乏症のマウスにおけるシナプス形成と機能を分析した.
主要な成果:
- アストロサイト形態変異はニューロンプロセスとの直接接触に依存し,シナプス回路の発達に並行する.
- アストロサイトで発現する神経リン素 (NL1,NL2,NL3) は,神経神経リン素と相互作用して,アストロサイトの形態を制御する.
- アストロサイト NL2 の欠如は,刺激性シナプス形成/機能を低下させ,同時に抑制性シナプス機能を高めます.
結論:
- アストロサイト形態変異は,ニューロリギン-ニューレキシンの相互作用を通じてシナプトゲネシスに関連しています.
- アストロサイトNL2は刺激性および抑制性シナプスバランスを調節する上で重要な役割を果たします.
- アストロサイト内の機能不全のニューロリギンは,神経学的疾患に寄与する可能性があります.
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