Experimental study of blood pressure and its impact on spontaneous hypertension in rats with Xin Mai Jia

Biomedicine & Pharmacotherapy = Biomédecine & Pharmacothérapie
Yun JingYa-Ling Yin

Abstract

The aim of this study was to evaluate the antihypertensive effect of Xin Mai Jia (XMJ) and to explore the mechanism of its hypotensive effect. A total of 50 spontaneously hypertensive rats (SHR) were randomised into five groups. A total of 30 Wistar-Kyoto rats were randomised into three groups, comprising the control group. All of the rats were administered medicine through a gastrogavage once a day for 8 weeks. The tail-cuff method was applied to their monitor blood pressure. After 8 weeks of treatment, serum NO, SOD activity, MDA level, ET, ALD, AngII, RE, and CGRP in the serum were detected in all of the rats. Pathological changes in the aorta were observed via haematoxylin-eosin (HE) and immunohistochemical staining. Vasodilation function was assessed by measuring acetylcholine-induced vessel relaxation in the rats' organ chambers. The function of the mesenteric arteries was measured using DMT wire myography. Human aortic smooth muscle cells (HASMCs) and human umbilical vein endothelial cells (HUVECs) injury models were induced by hydrogen peroxide (H2O2). HASMCs and HUVECs were injured by H2O2 and then exposed to various drugs. HASMC and HUVEC migration was evaluated using the cell scratch test. The expression of the AT1 r...Continue Reading

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