阿斯特拉加勒斯 (Astragalus mongholicus) 通过ESR1降低调节RhoA/ROCK通路改善心室重塑
Hualei Dai1,2, Siming Tao1, Yingxia Guan1
1Department of Cardiology, The Affiliated Hospital of Yunnan University.
International heart journal
|November 15, 2023
概括
阿斯特拉加勒斯提取物通过减少心脏损伤,改善高血压大鼠的心脏功能. 这种传统的草药通过通过雌激素受体1 (ESR1) 下调RhoA/ROCK通路而起作用.
科学领域:
- 心血管药理学心血管药理学
- 综合医学是一个整体医学.
- 分子心脏病学分子心脏病学
背景情况:
- 高血压诱导的心肌改造是一个重要的健康问题.
- 通过哪些精确的分子机制,阿斯特拉加勒斯蒙霍利克斯施加心脏保护作用仍然在很大程度上未被定义.
- 卵巢切除自发高血压大鼠 (OVX-SHR) 作为研究绝经后高血压和心脏重塑的相关模型.
研究的目的:
- 在OVX-SHR大鼠模型中研究阿斯特拉加勒斯提取物对心室重塑的治疗作用.
- 阐明潜在的分子通路,特别是RhoA/ROCK信号级联和雌激素受体1 (ESR1) 的作用.
主要方法:
- 建立OVX-SHR模型,然后用阿斯特拉加卢斯提取物或瓦尔萨坦治疗.
- 评估血液动力学和心脏功能参数.
- 组织病理学分析 (HE,马森染色) 用于心肌结构和原沉积.
- 针对α-平滑肌动蛋白 (α-SMA) 的免疫组织化学.
- 对炎症性细胞因子,IκB,p65,Cleaved-Caspase3,RhoA和ROCK1/2.2.的西部斑点分析
- 对于矩阵金属蛋白酶 (MMP-2,MMP-9) 的定量逆转录PCR (qRT-PCR).
主要成果:
- 阿斯特拉加卢斯提取物,特别是在高剂量时,在OVX-SHR大鼠中显著改善了血液动力学和心脏功能参数.
- 组织学分析显示,在阿斯特拉加勒斯治疗后,病理损伤和α-SMA表达减少,与模型组形成鲜明对比.
- 阿斯特拉加卢斯提取物降低了高水平的炎症性细胞因子 (TNF-α,IL-1β,IL-6),TGF-β,MMP-2和MMP-9.
- 抑制ESR1减弱了阿斯特拉加勒斯的有益作用,并恢复了RhoA/ROCK通路的激活.
结论:
- 阿斯特拉加卢斯提取物在OVX-SHR中显示出显著的心脏保护作用,防止高血压诱导的心肌重塑.
- 治疗机制涉及RhoA/ROCK通路的下调,通过雌激素受体1 (ESR1) 介导.
- 这些发现突出了阿斯特拉加勒斯作为一种潜在的治疗药物,用于管理与高血压相关的心血管并发症,特别是在绝经后的妇女中.
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