シナプス胞のリサイクルにおけるフォスホイノシチド代謝の重要な役割

O Cremona¹, G Di Paolo, M R Wenk

¹Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, Connecticut 06510, USA.

Cell

|October 27, 1999

まとめ

シナプトジャニン1の欠乏は,マウスで神経学的欠陥と早期死亡を引き起こす. このフォスフォノシチド・フォスファタゼは,シナプス膀のリサイクルと膜の伝達に不可欠です.

科学分野:

神経科学は神経科学である.
細胞生物学細胞生物学
バイオケミストリーバイオケミストリー

背景:

フォスフォノシチドは,膜交通の主要な調節体である.
シナプトジャニン1は,エンドサイトコートされた中間物質に関与するプレシナプス型ポリフォスフォノシチド・フォスファタゼです.

研究の目的:

シナプトジャニンのインビボ機能を調査する 1.
シナプトジャニン1がシナプス膀の循環における役割を決定する.

主な方法:

シナプトジャニン1欠乏症のマウスの生成と分析.
フォスホイノシチド・フォスファタゼ活性を測定する生化学的測定法.
細胞フリーリポソーム結合測定法.
海馬のスライスにおける電気生理学的記録.

主要な成果:

シナプトジャニン1欠乏症のマウスは,神経学的欠陥と胎内死亡率を示します.
変異性ニューロンは,PI (4,5) P2レベルが上昇し,クラスリンで覆われた膀の蓄積を示します.
フォスファタゼの活性低下は,リポソームとクラトリンコートの関連性が増加したものと相関しています.
ヒポキャンパスのスライスでは,シナプス抑制が強化され,回復が遅れていることが示されています.

結論:

シナプトジャニン1は,神経機能と生存に不可欠です.
シナプトジャニン1によって調節されるフォスフォノシチドの代謝は,シナプス膀のリサイクルに不可欠です.
シナプトジャニン1機能の障害は,シナプスの膜交通を損なう.

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