准STIM1有助于缓解动脉样硬化中血管光滑肌细胞的重塑
Zhenyu Cui1, Yue Zhang1, Lezhi Sheng1
1Department of Cardiovascular Medicine, Shanghai Pudong New Area People's Hospital, 201299 Shanghai, China.
Discovery medicine
|August 27, 2024
概括
流体相互作用分子1 (STIM1) 缺乏抑制血管光滑肌细胞 (VSMC) 重塑和动脉样硬化通过抑制Orai1. 这一发现凸显了STIM1作为心血管疾病的潜在治疗点.
科学领域:
- 心血管生物学 心血管生物学
- 细胞信号传输 细胞信号传输
- 分子医学是分子医学.
背景情况:
- 血管光滑肌细胞 (VSMC) 改造是心血管疾病的一个关键特征,与改变的信号传递和结构相互作用分子 (STIM) 蛋白质上调相关.
- 流体相互作用分子1 (STIM1) 在这个过程中发挥作用,使其成为研究动脉样硬化 (AS) 的目标.
研究的目的:
- 研究STIM1在动脉样硬化期间VSMC重塑中的作用.
- 分析STIM1影响VSMC行为和AS进展的分子机制.
主要方法:
- 在氧化低密度脂蛋白 (ox-LDL) 处理后评估了VSMC的生存能力,迁移和入侵.
- 建立了AS的动物模型,并对大动脉组织进行了组织学分析.
- 评估了STIM1和Orai1的表达及其对VSMC功能的影响.
主要成果:
- 氧化低密度脂蛋白 (ox-LDL) 增加了STIM1和Orai释放激活调节器1 (Orai1) 的表达.
- STIM1或Orai1的下调抑制了ox-LDL诱导的VSMC活力,迁移,入侵和表型切换.
- 在体内,STIM1过度表达上调了Orai1,而STIM1缺陷减轻了AS,影响了Orai1表达和VSMC表型.
结论:
- 在牛-LDL诱导的模型中,STIM1缺陷抑制了VSMC的生存能力,迁移,入侵和表型切换.
- STIM1通过抑制Orai1来缓解动脉样硬化,这表明STIM1-Orai1轴在AS病变发生过程中起着关键作用.
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