血管光滑肌细胞中的C/EBPβ激活促进超脂血症诱导的表型转变和动脉硬
Jun Ma1, Xiangyu Yang1, Yanan Li1
1Department of Cardiology, West China Hospital, Sichuan University, Sichuan, China.
Signal transduction and targeted therapy
|April 1, 2025
概括
CCAAT/增强剂结合蛋白β (C/EBPβ) 的激活驱动了血管光滑肌肉细胞的变化,导致高脂血症的动脉硬. 这种蛋白质可能为心血管疾病提供新的治疗点和生物标志物.
科学领域:
- 心血管生物学 心血管生物学
- 分子医学是分子医学.
- 血管细胞生物学 血管细胞生物学
背景情况:
- 动脉硬是心血管事件的关键风险因素,缺乏具体的临床目标.
- 超脂血症与动脉硬度密切相关,在动脉样硬化动脉中观察到高CCAAT/增强酶结合蛋白β (C/EBPβ).
- 在高脂血症期间,C/EBPβ在血管光滑肌细胞 (VSMC) 中的作用以前是未知的.
研究的目的:
- 在高脂血症条件下研究C/EBPβ在VSMC中的作用.
- 阐明链接高脂血症,VSMC变化和动脉硬的分子机制.
- 为了确定高脂血症引起的动脉硬的潜在治疗点和生物标志物.
主要方法:
- 在体外检查了VSMCs的胆固醇诱导的表型转变.
- 分析了C/EBPβ表达和激活与细胞骨调节相关,通过Disheveled相关的形态生成1激活剂 (Daam1).
- 在ApoE-/-小鼠的VSMC中利用了C/EBPβ的条件淘汰,以评估对血管重塑和脉冲波速度的影响.
- 相关的C/EBPβ调节的血小板衍生的生生长因子-CC (PDGF-CC) 与人类手腕脚脉冲波速.
主要成果:
- 胆固醇诱导了VSMC向巨细胞类细胞的转变,与C/EBPβ上调和激活相关.
- 与Daam1和细胞骨调节相关的C/EBPβ激活促进了VSMC表型切换.
- 在ApoE-/-小鼠中的条件C/EBPβ淘汰减少了血管重塑和大动脉脉冲波速.
- 通过C/EBPβ调节的PDGF-CC升高,与人类手腕关节脉冲波速相关.
结论:
- C/EBPβ激活促进VSMC过渡到类似巨细胞的表型,有助于高脂血症引起的动脉硬.
- PDGF-CC是人类动脉硬性的潜在生物标志物.
- 这项研究揭示了关键的分子通路和潜在的目标,用于管理高脂血症的动脉硬性.
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