PCSK9通过JAK2/STAT3途径调节肌纤维细胞转化,以调节心肌梗塞后的纤维化
Hailong Bao1, Xu Wang2, Haiyan Zhou2
1Department of Cardiovascular Medicine, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, Guizhou, China; Department of Cardiovascular Medicine, Gui Qian International General Hospital, Guiyang 550018, Guizhou, China.
Biochemical pharmacology
|December 28, 2023
概括
蛋白转化酶亚提利辛/凯类型9 (PCSK9) 通过促进纤维细胞通过JAK2/STAT3通路转化为肌纤维细胞驱动心脏纤维化. 抑制PCSK9可以减少心肌梗塞后的心肌纤维化.
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.
- 纤维化研究 纤维化研究
背景情况:
- 心脏纤维化,以过度的细胞外基质沉积为特征,增加心肌硬度,加剧心血管疾病.
- 蛋白转化酶亚素/素9型 (PCSK9) 是已知的胆固醇代谢调节剂,但其在心脏纤维化中的作用尚不清楚.
研究的目的:
- 研究PCSK9在心脏纤维化发展中的作用.
- 阐明PCSK9影响心肌重塑的潜在分子机制.
主要方法:
- 在心肌梗塞患者和老鼠模型中测量了循环PCSK9水平.
- 在心肌梗塞后的老鼠模型中进行PCSK9抑制.
- 在体外细胞培养中使用,以评估PCSK9对心脏纤维细胞和原蛋白生产的影响.
- 使用特定的抑制剂研究了JAK2/STAT3通路的参与.
主要成果:
- 在心肌梗塞中观察到PCSK9水平升高.
- 在大鼠中,PCSK9抑制显著降低了发作后心脏纤维化.
- 过度表达或刺激PCSK9促使心脏纤维细胞向肌纤维细胞分化,增加原I,III和α-SMA.
- JAK2/STAT3通路抑制剂S3I-201逆转了PCSK9诱导的亲纤维化作用.
结论:
- PCSK9被认为是心肌纤维化的一种新型调节剂.
- PCSK9可能通过JAK2/STAT3信号通路促进心脏纤维化.
- 向PCSK9可能为缓解心血管疾病中的心脏纤维化提供治疗策略.
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