Antihypertensive activity of Rosa rugosa Thunb. flowers: Angiotensin I converting enzyme inhibitor

文献类型： 外文期刊

第一作者： Xie, Yajing

作者： Xie, Yajing;Zhang, Wei;Xie, Yajing

作者机构：

关键词： Rosa rugosa;Angiotensin I converting enzyme;ACE inhibitor;Antihypertensive effect;SHRs

期刊名称：JOURNAL OF ETHNOPHARMACOLOGY （ 影响因子：4.36； 五年影响因子：4.488 ）

ISSN： 0378-8741

年卷期： 2012 年 144 卷 3 期

页码：

收录情况： SCI

摘要： Ethnopharmacological relevance: Rosa rugosa Thunb.'s flowers have been used for medicinal and food purposes for hundreds years in China. They have been used in Traditional Chinese Medicine (TCM) to effectively help in expansion of blood vessels and improvement of microcirculation. Current high prevalence of hypertension, and the associated side effects of synthetic Angiotensin I converting enzyme inhibitors usually prescribed for this condition, led us to the investigation of possible inhibitory activity of the Rosa rugosa Thunb. flower extracts on Angiotensin I converting enzyme (ACE). Materials and methods: Two different extraction preparation: (1) powdered materials were extracted with water (RW) and then with water (RWW), ethyl acetate (RWE) and 95% ethanol (RWE95); (2) powdered materials were extracted with 95% ethanol (RE95) and then with water (RE95W), ethyl acetate (RE95E) and 95% ethanol (RE95E95). The inhibition activity was determined using in vitro the inhibitory effect on Angiotensin I converting enzyme (ACE), and using the acute response and chronic response on blood pressure which measured in spontaneously hypertensive rats (SHRs). Results: Both RE95E95 and RWW had highest ACE inhibitor activities. The higher inhibitor activity of RE95E95 was also evaluated in SHRs by oral administration for antihypertensive effect. In acute experiment, the decrease in systolic blood pressure (SBP) and the increase in heart rate (HR) was observed at 2 h after administration at high (40 g/kg) and low (20 g/kg) dose; such reductions in SBP were maintained for 12 h. Low dose had reduced SBP significantly more than high dose. In multiple oral administration chronic experiment, a SBP reduction of 17.5 mmHg was observed after 6d administration at low dose, and such reductions were maintained for the next 8 days. Conclusions: The experimental results demonstrated the antihypertensive effect of Rosa rugosa Thunb. flowers, which was attributed to inhibition of Angiotensin I converting enzyme. (C) 2012 Elsevier Ireland Ltd. All rights reserved.

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