機能的調節変異は,認知症における異なる転写ネットワークを伴う
Yonatan A Cooper1,2,3, Noam Teyssier4, Nina M Dräger4
1Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA.
まとめ
アルツハイマー病 (AD) と進行性超核性麻痺 (PSP) の機能的変異を特定することが重要です. この研究では,遺伝子ネットワークに影響を与える 320の機能的調節変種 (frVars) が発見され,神経変性疾患の遺伝学に関する理解を深めました.
科学分野:
- 遺伝学
- 神経科学
- ゲノミクス
背景:
- 遺伝子変異の機能的影響を予測することは,遺伝学における重要な課題です.
- 全ゲノム関連研究 (GWAS) では,アルツハイマー病 (AD) や進行性超核性麻痺 (PSP) などの複雑な疾患に関連した多数の遺伝位置が特定されていますが,因果的な変異を特定することは困難です.
研究 の 目的:
- アルツハイマー病 (AD) と進行性超核性麻痺 (PSP) に関連する機能的調節変種 (frVars) を体系的にスクリーニングし,特定する.
- これらの神経変性疾患における非コード遺伝的リスクを裏付ける分子メカニズムを検証する.
主な方法:
- 5706 GWASで特定された変種を制御機能のためにスクリーニングするために,大量並列レポーターアッセイ (MPRAs) を利用した.
- 特定されたリスクロシオの検証のためにCRISPRの干渉や切除を用いた.
- 転写因子結合部位と増強剤の活性が細胞型特異的に破壊されるための機能的変種を分析した.
主要な成果:
- 17q21.31領域を含む27のロシで320の機能的調節変異 (frVars) が確認された.
- AD (例えば,C4A,APOC1) とPSP (例えば,PLEKHM1,KANSL1) に対して複数のリスクロキーを検証した.
- 機能的変種が細胞型特異な増強剤に収束し,PSPの病原性におけるニューロンのSP1駆動の規制ネットワークを関与することを発見した.
結論:
- ADとPSPにおける非コード遺伝的リスクは,特定の転写プログラムを通じて作用する一般的な変異によって大きく左右されます.
- この発見は,神経変性疾患の遺伝的構造を解剖する際に機能的ゲノミクスの重要性を強調しています.
- PSPの病原化に寄与するSP1駆動のニューロンの制御ネットワークを明らかにし,潜在的な治療標的を提供した.
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