コラプシン (Collapsin):脳内のタンパク質で,神経細胞の成長 cono の崩壊と麻痺を誘発する
1Department of Neuroscience, University of Pennsylvania School of Medicine, Philadelphia 19104.
Cell
|October 22, 1993
まとめ
研究者らは,ニューロンの成長コンを崩壊させる新しいグリコタンパク質であるコラプシンを特定した. この排斥的な誘導は,発達と再生の間に特定の成長の運動性を阻害する可能性があります.
科学分野:
- 神経科学は神経科学である.
- 発達生物学 発達生物学について
- 分子生物学は分子生物学である.
背景:
- 発達の過程でニューロンの成長コーンのパスファインディングを指示するために,反発的ガイドラインは極めて重要です.
- これらのシグナルはまた,成熟したニューロンにおける軸索再生を阻害する役割を果たします.
- これらのシグナルを理解することは,神経の発達と修復を理解するために不可欠です.
研究 の 目的:
- ニューロンの発達に関与する新しい排斥的誘導信号を特定し,特徴づけること.
- 成長コーンの誘導と崩壊の基礎となる分子機構を調査する.
主な方法:
- 鶏の脳から100kDのグリコタンパク質を分離し,特徴づけました.
- 精製されたグリコプロテインが神経細胞の成長コンに与える影響を評価するためのインビトロアッセイ.
- タンパク質ホモロジーとドメイン構造の分析.
主要な成果:
- コラプシンと呼ばれる新しいグリコタンパク質が特定され,ピコモラ濃度でニューロンの成長コンの崩壊と麻痺を誘発することが判明しました.
- コラプシンのC端末には,免疫グロブリンのようなドメインと基本領域が含まれ,N端末はファシクリンIVとの同質性を示しています.
- リコンビナントコラプシンでは,特に感受性ギャングリアンの成長コンが崩壊したが,網膜のギャングリアン細胞成長コンは崩壊しなかった.
結論:
- コラプシンは,特定のニューロン集団に対する強力な排斥的誘導信号である.
- それは,成長の運動性を抑制するリガンドとして機能する可能性が高い.
- コラプシンは,標的ニューロンの成長と誘導機構を理解する上で重要な分子です.
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