内皮のTBK1欠乏症は,PAK1/ERK1/2シグナリングを抑制することにより,内皮からメセンキマへの移行とアテロゲネシスを阻害する
Yujie Pu1,2,3,4, Peihua Dong1, Lei He1,2
1Department of Biomedical Science (Y.P., P.D., L.H., Y.W., Q.C., C.K.C., L.W., Y.H.), City University of Hong Kong, China.
Circulation research
|February 13, 2026
まとめ
タンク結合キナーゼ1 (TBK1) は,エンドセリウムからメゼンキーマへの移行 (EndMT) と動脈硬化を引き起こす. GSK8612でTBK1を阻害すると,プラーク形成が減り,血管疾患に対する潜在的な治療戦略を提供します.
科学分野:
- 心血管生物学 心血管生物学
- 分子医学は分子医学である.
- 炎症の研究 炎症の研究
背景:
- 動脈硬化性血管疾患は死亡の主な原因であり,脂質を下げる薬以外の新しい治療法を必要としています.
- 内皮の炎症と内皮からメゼンキマへの移行 (EndMT) をターゲットにすることは,治療結果の改善に不可欠です.
- タンク結合キナーゼ1 (TBK1) 遺伝子変異の増加は冠動脈疾患の患者で観察されていますが,内皮機能不全と動脈形成におけるその役割は不明です.
研究 の 目的:
- 内皮機能障害,炎症,動脈硬化症におけるTANK結合キナーゼ1 (TBK1) の機能を明らかにする.
- TBK1の活性化と内皮からメゼンキマへの移行 (EndMT) を結びつけるメカニズム的経路を調査する.
- 動脈硬化症の臨床前モデルのTBK1阻害剤の治療の可能性を評価する.
主な方法:
- 液体染色体-質量スペクトロメトリー,免疫染色,RNAシーケンシング,およびヒトとマウスの動脈におけるウェスタンブロットを用いた.
- ApoE-/-マウスの内皮に特異的なTBK1ノックダウンを調査し,TurboIDベースの質量スペクトロメトリと共免疫降雨をメカニズム研究のために使用しました.
- アポE/-マウスとヒト内皮細胞におけるTBK1阻害剤GSK8612の有効性を評価した.
主要な成果:
- 増加したTBK1発現と活性化 (Ser172でのリン酸化) は,動脈硬化性動脈で発見され,炎症因子 (TNF-α,IL-1β) によって誘発されました.
- TBK1の活性化は,PAK1IP1との相互作用を通じてRAC1-PAK1とERK1/2をリン酸化し,PAK1の結合を抑制することによってEndMTを促進した.
- エンドテリウム特異的なTBK1ノックダウンまたはGSK8612治療は,脂質レベルを変えることなく,ApoE-/-マウスにおけるEndMTと動脈硬化症の発達を著しく抑制しました.
結論:
- 活性化されたTBK1は,PAK1/ERK信号伝達経路を通じてEndMTとアテロゲネシスを促進する.
- GSK8612によるノックダウンまたは阻害によるTBK1をターゲットにすることで,EndMTと動脈硬化性プラーク形成を効果的に抑制します.
- TBK1阻害剤は,動脈硬化性血管疾患の治療のための有望な治療法である.
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