Sci Trans Med:肥胖,会直接损伤血管

2019-09-28 杜姝 生物探索

近日由英国牛津大学的研究团队发表在《Science Translational Medicine》上的一项研究给出了最新答案。研究人员发现,在肥胖的心脏病患者中,动脉周围的脂肪会分泌大量称为WNT5A的蛋白质。令人惊讶的是,这些蛋白对血管具有“毒副作用”。

俗话说,一白遮三丑,一胖毁所有。肥胖不仅仅让你行动迟缓,颜值尽毁,还会引“病”上身。之前许多研究表明,与苗条的人相比,肥胖的人患心脏病的风险更高。

究竟脂肪是如何“伤害”心血管的呢?

近日由英国牛津大学的研究团队发表在《Science Translational Medicine》上的一项研究给出了最新答案。研究人员发现,在肥胖的心脏病患者中,动脉周围的脂肪会分泌大量称为WNT5A的蛋白质。令人惊讶的是,这些蛋白对血管具有“毒副作用”。

在这项研究中,该研究首席研究员Charalambos Antoniades博士及其团队对大约1000名接受心脏手术的心脏病患者的血液和组织样本进行了分析。Antoniades博士发现:肥胖患者的血液中一种被称为WNT5A的蛋白含量超出正常阙值,并且具有较高WNT5A水平的患者往往会在其动脉中显示出更快的“斑块”积聚进程。而这一“斑块”便是脂肪、钙和其他物质的沉积物,这些物质往往是阻塞动脉并引发心脏病或中风的罪魁祸首。



为了验证这一结果的正确性,研究人员进行更深入的研究。更多试验证据证明:血管细胞暴露于为WNT5A的蛋白时,该蛋白会分泌出更多的“有毒产物”,加速斑块堆积的过程。

研究人员表示:WNT5A蛋白或许可以成为治疗或预防心脏病的新药的良好靶标。Antoniades博士也进一步表示:“如果我们开发出一种治疗方法,可以'关闭'脂肪细胞中的WNT5A产生,或阻断其对血管壁的作用,那么我们或许能够'消除'肥胖症并预防心脏病和中风。”



Benjamin Hirsh博士(中)图片来源:Northwell Health

两名美国心脏病专家对这一研究结果进行了审查。其中,Northwell Health公司桑德拉•阿特拉斯•巴斯心脏医院预防心脏病学主任Benjamin Hirsh博士表示:WNT5A的“途径”可能只是肥胖损害血管的一种方式。但这确是让我们理解肥胖损害机制的重要一步。

Michael E.DeBakey VA医疗中心的心脏病专家Salim Virani博士则指出:没有任何药物可以取代健康的生活方式。饮食和运动永远是第一位的,即使适度的减肥也可以有益于心脏健康。

原始出处:
Ioannis Akoumianakis, Fabio Sanna, Marios Margaritis, et al. Adipose tissue–derived WNT5A regulates vascular redox signaling in obesity via USP17/RAC1-mediated activation of NADPH oxidases. Science Translational Medicine. 18 Sep 2019.

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    2020-02-09 bsmagic9140
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    2019-09-29 thm112988

    0

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    2019-09-28 1209e435m98(暂无昵称)

    学习了,谢谢分享

    0

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