Iran J Med Sci. 2017 May;42(3):266-274.

Antihypertensive Effects of Hydroalcoholic Extract of .

Iranian journal of medical sciences

Mohammad Reza Haydari, Mohammad Reza Panjeshahin, Elaheh Mashghoolozekr, Ali Akbar Nekooeian

PMID: 28533575 PMCID: PMC5429495

Abstract

BACKGROUND: Hawthorn species decreases blood pressure and relaxes precontracted vessels. This study aimed at examining the antihypertensive effect and related mechanisms of hydroalcoholic extract of

METHODS: Six groups of male Sprague-Dawley rats, each containing 6 to 8 rats, were studied. The groups comprised of one sham group and 5 renal artery-clipped groups. The sham group received vehicle (distilled water 0.5 ml/day) and the renal artery-clipped groups received vehicle or the extract at 5, 10, 20 or 30 mg/kg/day. Oral vehicle or extract was administered daily for 4 weeks following sham-operation or induction of hypertension. Systolic blood pressure and heart rate were measured weekly. Isolated aorta study was performed by last week and serum superoxide dismutase and glutathione reductase were measured. The findings were analyzed using one-way analysis of variance and Duncan's multiple range tests at P≤0.05 using SigmaStat software.

RESULTS: The data obtained after 4 weeks of treatment showed that the renal artery-clipped group receiving vehicle had significantly higher systolic blood pressure (P=0.002) and phenylephrine maximal response (P=0.01); and lower acetylcholine maximal response (P=0.01), serum superoxide dismutase (P=0.006) and serum glutathione reductase (P=0.006) than those of the sham group. The renal artery-clipped group receiving extract had significantly lower systolic blood pressure (P=0.03) and phenylephrine maximal response (P=0.01); and significantly higher acetylcholine maximal response (P=0.01), serum superoxide dismutase (P=0.015), and serum glutathione reductase (P=0.015) than those of the renal artery-clipped group receiving vehicle.

CONCLUSION: Our findings show that the hydroalcoholic extract of

Keywords: Crataegus; Hypertension; Nitric oxide; Oxidative stress; Renovascular

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