Circulation-Heart Failure:经皮迷走神经刺激通过其抗炎作用改善射血分数保留的心衰

2022-07-21 MedSci原创 MedSci原创

经皮迷走神经刺激神经调节通过抗炎和抗纤维化作用改善了HFpEF大鼠模型的心功能。这些结果为进一步的人体临床试验提供了理论基础。

全身前炎症状态在射血分数保留心力衰竭(HFpEF)的发生发展中起着重要作用。低水平经皮迷走神经刺激可抑制动物和人类的炎症,并且由α7烟碱乙酰胆碱受体(α7nAchR)依赖通路所介导。

近日,心血管领域权威杂志Circulation: Heart Failure上发表了一篇研究文章,研究人员在HFpEF大鼠模型中探究了在α7nAchR药物阻断后经皮迷走神经刺激对心功能、炎症和纤维化的影响。

7周龄达尔盐敏感大鼠给予高盐饲料喂养6周,诱导HFpEF,随后进行(1)经皮迷走神经刺激, (2) 经皮迷走神经刺激与α7nAchR阻滞剂甲基甜菜碱,(3)假手术组和(4)奥美沙坦组。在13和17周龄时测量血压、超声心动图心脏功能、心率变异性和血清细胞因子。第17周检测了心肌纤维化、炎症细胞浸润和基因表达。

经皮迷走神经刺激减缓了血压的升高程度,改善心脏功能;炎症细胞因子、巨噬细胞浸润和纤维化减少;与其他组相比,经皮迷走神经刺激组生存率有所提高。甲氨基乌头碱减弱了这些效应,而奥美沙坦没有改善心功能或纤维化,尽管与经皮迷走神经刺激具有相似的血压。在经皮迷走神经刺激组和经皮迷走神经刺激加甲乌头碱组心率变异性也有类似的改善,但在其他组心率变异性仍然较低。经皮迷走神经刺激逆转了HFpEF心脏异常的炎症信号通路。

由此可见,经皮迷走神经刺激神经调节通过抗炎和抗纤维化作用改善了HFpEF大鼠模型的心功能。这些结果为进一步的人体临床试验提供了理论基础。

原始出处:

Khaled Elkholey.et al.Transcutaneous Vagus Nerve Stimulation Ameliorates the Phenotype of Heart Failure With Preserved Ejection Fraction Through Its Anti-Inflammatory Effects.Circulation: Heart failure. 2022;https://www.ahajournals.org/doi/10.1161/CIRCHEARTFAILURE.122.009288

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    2022-07-22 slcumt

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