Circ Res:醛固酮/盐皮质激素受体通路在二尖瓣脱垂发展中的新作用

2021-07-14 MedSci原创 MedSci原创

二尖瓣脱垂(MVP)是最常见的瓣膜疾病之一。然而,二尖瓣小叶组织中涉及纤维粘液瘤变化的分子和细胞机制尚未阐明。醛固酮 (Aldo) 促进心肌纤维化,而 MR(盐皮质激素受体)拮抗剂 (MRA) 通过减

二尖瓣脱垂(MVP)是最常见的瓣膜疾病之一。然而,二尖瓣小叶组织中涉及纤维粘液瘤变化的分子和细胞机制尚未阐明。醛固酮 (Aldo) 促进心肌纤维化,而 MR(盐皮质激素受体)拮抗剂 (MRA) 通过减少心脏纤维化来改善心脏功能。近日,研究人员探究了Aldo/MR 在与 MVP 相关的纤维粘液瘤修饰中的作用,研究结果已发表于Circ Res。

Aldo增强瓣膜间质细胞活化标志物并诱导瓣膜内皮细胞的内皮-间充质转化,导致蛋白多糖分泌增加。MRA 阻止了上述所有影响。细胞因子阵列显示 CT-1(心肌营养素-1)是 Aldo 诱导的瓣膜间质细胞活化和蛋白多糖分泌的介质,CD(分化簇)14 是 Aldo 诱导的内皮-间充质转化和蛋白多糖分泌的介质瓣膜内皮细胞。在通过去甲右芬氟拉明给药产生的 MVP 实验小鼠模型中,MRA 治疗降低了二尖瓣厚度和蛋白多糖含量。内皮特异性 MR 缺失阻止了由去甲右芬氟拉明给药引起的纤维粘液瘤变化。此外,在接受 MRA 治疗的 MVP 患者的二尖瓣中,蛋白多糖表达略低。

综上,这些发现首次证明,Aldo/MR通路调节与MVP发展相关的瓣膜间质细胞和瓣膜内皮细胞的表型、分子和组织学变化。MRA 治疗似乎是减少 MVP 纤维粘液瘤改变的有希望的选择。

 

原始出处:

 

Jaime Ibarrola, et al., A New Role for the Aldosterone/Mineralocorticoid Receptor Pathway in the Development of Mitral Valve Prolapse. Circ Res. 2020 Jul 17;127(3):e80-e93. doi: 10.1161/CIRCRESAHA.119.316427. 

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    2021-07-15 cmsvly
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    2021-07-15 wwzzly
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