JAHA:女性内皮功能与剪切应力刺激的关系

2019-02-16 xing.T 网络

由此可见,与男性相比,年轻女性存在内皮功能与引发SR刺激之间具有更强关系的证据。雌激素可能有助于解释这一发现,但需要更大型的健康人群才能获得结论性成果。

绝经前妇女的血管疾病发病率较低,这可能部分是由于雌激素对内皮功能的保护作用。动物研究表明,雌激素也可以改善剪切速率(SR)和内皮功能之间的关系。近日,血管疾病领域权威杂志JAHA上发表了一篇研究文章,研究人员的目的是探讨女性与男性之间以及绝经前与绝经后女性之间内皮功能(即血流介导的扩张[FMD])和SR(即曲线下的SR区域[SRAUC])之间的关系。

肱动脉FMD和SRAUC根据专家共识指南测量了932名健康参与者,分为年轻人(18-40岁,389名男性,144名女性)和老年人(>40岁,260名男性,139名女性) 。其次,研究人员比较了绝经前(n=173)和绝经后妇女(n=110)。

有证据表明所有组中SRAUC和FMD之间的相关性较弱,但是在年龄较大的男性中,结果强度存在差异。在线性回归中使用相互作用项(年龄-性别×SRAUC)的进一步探索揭示了与FMD的差异关系(年轻女性与年轻男性[β=-5.8-4,P=0.017]和年长女性[β=-5.9-4,P=0.049])。绝经前妇女SRAUC和FMD之间的相关性(r2=0.097)与绝经后妇女的SRAUC和FMD无统计学差异(r2=0.025; Fisher P=0.30)。使用严格的健康标志物入选标准(n=505)的亚组分析证实,与年轻男性和老年女性相比,年轻女性的FMD-SRAUC相关性更强。

由此可见,与男性相比,年轻女性存在内皮功能与引发SR刺激之间具有更强关系的证据。雌激素可能有助于解释这一发现,但需要更大型的健康人群才能获得结论性成果。

原始出处:

Sophie M. Holder.et al.Relationship Between Endothelial Function and the Eliciting Shear Stress Stimulus in Women: Changes Across the Lifespan Differ to Men.JAHA.2019.https://www.ahajournals.org/doi/10.1161/JAHA.118.010994

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    2019-02-18 zhaohui6731
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