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在老年自发高血压大鼠中,终身TMAO暴露会产生低血压效应

Wojciech Kopacz¹, Kinga Jaworska¹, Mateusz Koper¹

¹Department of Experimental Physiology and Pathophysiology, Laboratory of the Centre for Preclinical Research, Medical University of Warsaw, Warsaw, Poland.

Frontiers in cardiovascular medicine

|September 15, 2025

概括

终身三甲基胺N氧化物 (TMAO) 补充剂降低了高血压大鼠的血压和心脏应变. 虽然TMAO改善了循环功能,但增加的三甲基胺水平需要进一步评估安全性.

科学领域:

心血管研究研究心血管研究
代谢学代谢学代谢学
高血压研究高血压研究

背景情况:

三甲基胺N氧化物 (TMAO) 是一种细菌代谢物,在心血管健康中起着有争议的作用,表现出有害和有益的影响.
慢性TMAO暴露对高血压相关并发症的确切影响尚不清楚,特别是在组织氨酸-血管酶系统 (RAS) 方面.

研究的目的:

研究慢性TMAO补充剂对自发高血压大鼠 (SHRs) 的高血压相关并发症的长期影响.
在高血压模型中确定TMAO是否调节心血管功能和组织RAS表达.

主要方法:

男士SHR接受了水或TMAO补充水80周.
评估了血液动力学,心声学和病态学参数.
评估组织RAS成分表达和生物标志物概况,包括NT-proBNP.

主要成果:

补充TMAO显著降低了平均和静脉压,并降低了NT-proBNP水平.
在TMAO治疗的老鼠中观察到尿液和自然尿液的增加,左心房尺寸较小.
在心脏,脏和结肠中对RAS组件 (血管素受体,AT1b,AT2受体) 的表达升高;注意到三甲基胺水平增加.

结论:

终身TMAO暴露表明对高血压的循环功能有保护作用,减少心脏工作量.
观察到的RAS成分的上调可能是TMAO降血压效应的补偿机制.
三甲基胺的同时增加需要进一步研究TMAO补充剂的长期安全性.

关键词:

这就是TMAMA的意义.这就是TMAOO.细菌代谢物的细菌代谢物.心血管系统的心血管系统这种高血压,高血压.

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