プロフィリン1遺伝子の変異は,家族性アミオトロフィック横筋硬化症を引き起こす
Chi-Hong Wu1, Claudia Fallini, Nicola Ticozzi
1Department of Neurology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.
Nature
|July 18, 2012
まとめ
プロフィリン1 (PFN1) 遺伝子の変異は,家族性アミオトロフィック横筋硬化症 (FALS) の原因として特定されています. PFN1変異はアクチンダイナミクスを破壊し,FALSのモーターニューロン変性に寄与します.
科学分野:
- 神経科学は神経科学である.
- 遺伝学 遺伝学とは
- 細胞生物学 細胞生物学
背景:
- アミオトロフィック横筋硬化症 (ALS) は,運動ニューロンに影響を与える神経変性疾患です.
- 家族性ALS (FALS) は,症例の10%を占め,しばしば支配的な遺伝性があります.
- FALS症例の約50%の遺伝的原因は不明のままである.
研究 の 目的:
- 家族性ALS (FALS) の遺伝的基礎を調査する.
- FALS.に関連する新しい遺伝子を特定する.
- ALSの病原性におけるアクチン細胞骨格の調節の役割を明らかにする.
主な方法:
- エクソームシーケンシングは2つの大きなFALSファミリーで実施されました.
- 274件のFALS症例のシーケンス分析が行われました.
- 細胞およびプライマリモーターニューロンモデルを使用して,PFN1変異体の機能を評価しました.
主要な成果:
- プロフィリン1 (PFN1) 遺伝子の変異は,FALSの原因として特定されました.
- PFN1の変異は,しばしばTDP-43.3を含む,ユビキチン化,不溶性タンパク質集積物へと導いた.
- 変異したPFN1はアクチンダイナミクスを低下させ,結合アクチンレベルを低下させ,アクソンの増殖を阻害し,成長コーンの形態学に影響を与えました.
結論:
- プロフィリン1 (PFN1) 変異は,家族性ALS (FALS) の新しい遺伝的原因です.
- PFN1の変異はアクチン細胞骨格を破壊し,モーターニューロンの退化に寄与する.
- 細胞骨格経路の変化は,ALSの病原性に関与しています.
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