uPAR 缺乏引发TGFβ1介导的纤维化重塑在心脏周血管类微环境中
Yulia Goltseva1, Zoya Tsokolaeva2,3, Irina Beloglazova2
1National Medical Research Centre of Cardiology named after academician E.I. Chazov, Moscow, 121552, Russian Federation. YDgoltseva@cardio.ru.
Stem cell research & therapy
|February 14, 2026
概括
泌尿酸酶等离子素激活器受体 (uPAR) 的损失通过破坏周围血管微环境并放大TGFβ1信号,使心脏纤维化恶化. 这突出了UPAR作为纤维性心脏病的潜在治疗点.
科学领域:
- 心血管生物学 心血管生物学
- 纤维化研究 纤维化研究
- 疾病的分子机制.
背景情况:
- 心脏纤维化是一个主要的健康问题,与内皮功能障碍和周血管微环境损伤有关.
- 泌尿酸酶等离子体激活器受体 (uPAR) 在血管改造和纤维化中至关重要,但其在心脏纤维化机制中的作用尚不清楚.
- 这项研究调查了UPAR在心脏周血管微环境纤维化改造中的作用.
研究的目的:
- 阐明UPAR缺乏导致心脏周血管微环境中纤维化重塑的机制.
- 描述心脏细胞中的UPAR表达及其对益纤维细胞信号传递的影响.
主要方法:
- 单细胞RNA测序和免疫光染色用于绘制小鼠心中的UPAR表达.
- 在体外模型使用心脏球 (CSs) 和CRISPR/Cas9生成的普拉尔淘汰纤维细胞 (FBs).
- 刺激TGFβ1以诱导亲纤维细胞激活,然后通过西部涂抹分析ECM沉积,细胞转化和分泌组概况.
主要成果:
- uPAR通过心脏周血管中的内皮细胞 (ECs) 和FBs来表达.
- 在CS中PAR缺乏导致活性TGFβ1的增加,整合素功能受损,以及改变的分泌体,促进ECM沉积和降低EC活力.
- 普拉尔淘汰赛FB显示TGFβ1介导的Akt信号传递和ECM沉积增强,证实了UPAR的作用.
结论:
- uPAR缺乏驱动心脏周血管微环境的纤维化重塑.
- 失去UPAR会加剧TGFβ1介导的纤维化反应.
- uPAR成为缓解心脏纤维化的潜在治疗标.
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