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Hypertension:科学家阐明引发心血管疾病的新机制

2015-05-13 佚名 生物谷

血管硬度增加被认为是引发成年人发生高血压的重要原因,此前对主动脉僵硬的研究主要是研究改变血管壁特性的结构蛋白的改变,而血管壁特性的改变会引发血管变得僵硬;如今发表在国际杂志Hypertension上的一篇研究论文中,来自密苏里大学的研究人员通过研究表示,血管壁内部的平滑肌细胞或许是引发血管僵硬的主要促成因素,而血管僵硬可以引发高血压的发生,研究人员认为本文研究或可帮助开发治疗高血压的新型药物疗法。

血管硬度增加被认为是引发成年人发生高血压的重要原因,此前对主动脉僵硬的研究主要是研究改变血管壁特性的结构蛋白的改变,而血管壁特性的改变会引发血管变得僵硬;如今发表在国际杂志Hypertension上的一篇研究论文中,来自密苏里大学的研究人员通过研究表示,血管壁内部的平滑肌细胞或许是引发血管僵硬的主要促成因素,而血管僵硬可以引发高血压的发生,研究人员认为本文研究或可帮助开发治疗高血压的新型药物疗法。

研究者Gerald Meininger说道,动脉和血管僵硬一般发生于机体老化阶段,而且其和心脏病及中风发病风险的增加直接相关;随着年龄增长,我们机体的主动脉就会变紧而且变得僵硬,主动脉可以扮演机体的减震器来抑制和每次心跳相关的脉冲,一旦主动脉变得僵硬就会引发一系列的问题,比如高血压、心脏血管事件,甚至死亡。

在美国因老化引发的高血压患病风险在老年男性和女性中高达90%以上,而近期研究揭示了引发人类机体动脉僵硬的一些新机制,研究者主要聚焦于研究结构基质蛋白、组成血管外壁的非活性组分,以及位于血管内壁的内皮细胞,随后研究者发现平滑肌细胞的潜在来源或许是血管壁中间的主要组成部分。

这项研究中,研究人员从年轻和老化的高血压大鼠模型机体中分离出了主动脉细胞,随后利用原子力显微技术结合一种可以同单一细胞分子相互作用小型探针进行联合研究,测定了探针刺入样本的压力以及揭示了探针如何吸附于平滑肌细胞;研究者发现,高血压可以增加血管平滑肌细胞的僵硬度以及粘稠度,而这些改变同时也会随着机体老化而增强。

揭示平滑肌细胞是动脉僵硬的主要促成因子对于帮助开发潜在可预防的药物来应对心血管疾病或逆转疾病表现非常关键。后期研究者将寻求政府的自主来进行一些预防性药物的开发,研究者希望通过更多的深入研究早日进入临床试验阶段,为开发预防和治疗高血压等心血管疾病的新型疗法带来帮助和希望。

原始出处:

Nancy L. Sehgel, Zhe Sun, Zhongkui Hong, William C. Hunter, Michael A. Hill, Dorothy E. Vatner, Stephen F. Vatner, Gerald A. Meininger.Augmented Vascular Smooth Muscle Cell Stiffness and Adhesion When Hypertension Is Superimposed on Aging.Hypertension, May 2015.doi: 10.1161/HYPERTENSIONAHA.114.04456

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    2015-08-08 feather89
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    2015-05-14 hbwang006

    国外研究的真细致

    0

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    2015-05-13 huaxipanxing

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