亚斯素通过超氧化物信号传递促进高血压大鼠的血管改造
Zhi-Qin Xu1,2, Xiu-Zhen Li2, Rong Zhu1
1Emergency Department.
Journal of hypertension
|May 1, 2024
概括
阿斯素是一种蛋白质激素,通过NADPH氧化酶介导的超氧化物生产驱动血管光滑肌肉细胞的增殖和迁移. 抑制阿斯素可以降低高血压和大鼠的血管重塑.
科学领域:
- 心血管生物学 心血管生物学
- 内分泌学 在内分泌学.
- 血管生理学 血管生理学
背景情况:
- 血管光滑肌细胞 (VSMC) 的增殖和迁移是血管重塑的关键.
- 一种新型蛋白质激素阿斯素与代谢疾病有关,但其心血管作用尚不清楚.
- 高血压与血管重塑有关,需要对促成因素进行调查.
研究的目的:
- 阐明阿斯素在VSMC增殖,迁移和血管改造中的作用和机制.
- 为了研究阿斯素在高血压的老鼠模型中的参与.
主要方法:
- 从Wistar-Kyoto大鼠 (WKY) 和自发高血压大鼠 (SHR) 中分离出了VSMC.
- 在体外研究中评估了阿斯素对VSMC增殖,迁移,NADPH氧化酶 (NOX) 活性和超氧化物产生的影响.
- 在体内研究涉及阿斯素在SHR中被淘汰,以评估对氧化应激,血管改造和血压的影响.
主要成果:
- 阿斯素在SHRVSMC中得到了上调,并在WKY和SHR中促进了增殖和迁移.
- 亚斯素增加了NOX活性,NOX1/2/4表达和超氧化物产生,而这被亚斯素 knockdown 抑制.
- 收费类受体4 (TLR4) 倒退减弱了阿斯素诱导的增殖,迁移和氧化应激.
- 在体内,阿斯素的降解降低了氧化应激,血管重塑,并降低了SHR中的血压.
结论:
- 阿斯素通过NOX介导的超氧化物生产促进VSMC的扩散和迁移.
- 抑制内源性阿斯素减弱了高血压大鼠的VSMC增殖,迁移和血管重塑.
- 阿斯素是高血压和相关的血管并发症的潜在治疗点.
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