JACC:来自心脏的激素是否会导致夜间血压升高?

2021-06-26 MedSci原创 MedSci原创

利钠肽 (NPs) 激素具有昼夜节律,下午水平较高,夜间水平较低

肥胖高血压和不良血管结局的高风险因素在肥胖人群中夜间血压高是常见的但是夜间血压高将增加不良心血管结局的风险如中风,心脏衰竭,心脏发作和心脏猝死。这种昼夜血压节律受损的原因尚不清楚,但科学家们认为利钠肽 (NPs) 可能是其背后的原因。

利钠肽 (NP)  是心脏产生的有益激素,负责调节血压以及人类的整体心血管和代谢健康。但是利钠肽 (NP) 水平的昼夜变化及其与 24 小时血压 (BP) 节律的关系尚未确定。

阿拉巴马大学伯明翰分校的研究人员最近在《美国心脏病学会杂志》上发表的一系列研究揭示了利钠肽存在昼夜节律,以及这种节律的紊乱如何导致肥胖个体患高血压和具有心血管健康不良的高风险。

在该研究中研究员筛选 52 名参与者,40 名参与者(18 人瘦,22 人肥胖;50% 女性;65% 黑人)完成了研究。研究员跟踪了24h的动态血压监测和重复抽血检测NP 水平评估了 NP 激素的 24 小时周期,并将其与 24 小时血压周期进行了比较此外研究员还研究了这些周期在瘦人和肥胖者之间有何不同。

经过对健康个体的严格临床试验,研究人员发现 NP 激素具有昼夜节律,下午水平较高,夜间水平较低,这类似于血压的 24 小时循环。然而,研究人员发现,NPs 与血压之间的关系在肥胖个体中的作用并不相同,导致夜间血压升高、心血管健康状况不佳以及心血管结局不佳的风险更高。NPs 的低产量与肥胖个体系统中相对较高的 NPs 消除相结合导致这些有益激素的低循环水平,这可能是 NP 缺乏背后的原因。

 

“这是我们第一次看到 NPs 与其他激素一样,具有 24 小时的节律”资深作者、UAB 心血管疾病部门的医师科学家 Pankaj Arora 医学博士说。“这些研究让我们更好地了解 NPs 以及肥胖个体 NP 缺乏背后的原因。我们现在有一种 FDA 批准的药物 (LCZ696),可以改善循环 NP 水平。这种药物被认为是心脏病的一线治疗方法失败,可用于提高 NP 水平。”

Arora 补充说,如果在一天中的正确时间给药,这种药物可以专门针对 NPs 和血压,并且可以精确地控制高血压。科学家认为,这些发现鼓励使用生理驱动的精确计时药物疗法来改善肥胖个体的昼夜血压分布。

参考文献:Chronobiology of Natriuretic Peptides and Blood Pressure in Lean and Obese Individuals  ,https://doi.org/10.1016/j.jacc.2021.03.291

 

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    2021-09-26 hbwxf
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    2021-06-27 澄潭映月

    LCZ696不就是现在的诺欣妥么

    0