J Clin Invest:揭示c-Abl/YAP信号通路在湍流介导的内皮细胞激活以及动脉粥样硬化中的作用与调控机制

2019-02-13 佚名 天津医科大学

天津医科大学基础医学院艾玎教授、朱毅教授课题组最新报道了c-Abl介导的YAP蛋白357位酪氨酸位点磷酸化调控在湍流剪切力介导的血管内皮激活以及动脉粥样硬化中的作用。相关研究成果于2019年1月在线发表在权威期刊《J Clin Invest》,题目为“c-Abl regulates YAPY357 phosphorylation to activate endothelial atherogeni

天津医科大学基础医学院艾玎教授、朱毅教授课题组最新报道了c-Abl介导的YAP蛋白357位酪氨酸位点磷酸化调控在湍流剪切力介导的血管内皮激活以及动脉粥样硬化中的作用。相关研究成果于2019年1月在线发表在权威期刊《J Clin Invest》,题目为“c-Abl regulates YAPY357 phosphorylation to activate endothelial atherogenic responses to disturbed flow”。

血液血管内的流动方式分为层流和湍流,而动脉粥样硬化斑块好发于湍流处,提示血流剪切力影响动脉粥样硬化进程。2016年该团队与香港中文大学团队合作发现层流剪切力通过调控YAP丝氨酸位点的磷酸化进而抑制YAP活性,从而减弱相关炎症基因的表达(Nature 2016; 540, 579–582)。最新的研究发现,湍流可以以integrin α5β1依赖的方式诱导YAP酪氨酸位点的磷酸化,内皮特异性的YAP过表达可以阻断integrin α5β1阻断肽段ATN161的抗动脉粥样硬化效果;进一步研究发现integrin α5β1的激活可以通过下游c-Abl促进YAP蛋白酪氨酸位点磷酸化,进而激活YAP和下游相关炎症基因的表达;在小鼠和人类动脉粥样硬化斑块处也可检测到YAP酪氨酸位点磷酸化的高表达,进一步证实了科研假说;最后,研究发现酪氨酸激酶抑制剂Bosutinib可以在动脉粥样硬化小鼠模型中显着抑制YAP酪氨酸位点的磷酸化并减轻动脉粥样硬化的进展。

本研究首次发现内皮细胞YAP酪氨酸位点磷酸化水平与动脉粥样硬化疾病发生密切相关,而Integrin 5β1/c-Abl可能是湍流激活YAP蛋白的重要分子机制,提示Integrin α5β1/c-Abl/YAP可以作为抗动脉粥样硬化的新的潜在靶点。

本研究得到国家自然科学基金重点项目、国际(地区)合作与交流项目、面上项目以及科技部重点研发计划等资助。

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    2019-06-01 gujh
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