title: Effects of trans-resveratrol on hypertension-induced cardiac hypertrophy using the partially nephrectomized rat model.
abstract: trans-Resveratrol (resveratrol) has been shown to have beneficial effects on the cardiovascular system in a number of studies. It is, however, unclear whether this naturally occurring compound can protect against cardiac hypertrophy. The aim of the present study was to investigate the effects of resveratrol on cardiac hypertrophy in vivo and the potential underlying mechanisms involving endothelin (ET), angiotensin (Ang) II and nitric oxide (NO) in partially nephrectomized rats. Animal models bearing cardiac hypertrophy were replicated in male Sprague-Dawley rats following partial nephrectomy (PNX). Resveratrol (10 or 50 mg/kg) was administered to rats by gavage for 4 weeks. Simultaneous PNX and sham operation controls were simultaneously established in the present study. The systolic blood pressure (SBP) of rats was measured at baseline and, along with heart weight, after 4 weeks treatment. Serum ET-1, AngII and NO concentrations were determined. In the present study, it was shown that, compared with rats in the sham-operated group, rats in the PNX group had significantly higher SBP (154.1 +/- 22.7 mmHg), heart weight (1.69 +/- 0.24 g) and serum ET-1 (125.70 +/- 26.27 pg/mL) and AngII serum concentrations (743.63 +/- 86.50 pg/mL), whereas serum NO concentrations were lower (21.1 +/- 6.9 micromol/L; all P < 0.05). These values in the sham control group were 114 +/- 10 mmHg, 1.28 +/- 0.13 g, 52.44 +/- 21.85 pg/mL, 528.7 +/- 158.5 pg/mL and 53.21 +/- 23.87 micromol/L, respectively. After 4 weeks treatment with 50 mg/kg resveratrol, SBP, heart weight and ET-1 and AngII concentrations had decreased to 135.4 +/- 15.8 mmHg, 1.39 +/- 0.15 g, 97.11 +/- 26.74 pg/mL and 629.64 +/- 116.18 pg/mL, respectively. However, the serum NO concentration had increased to 40.1 +/- 14.6 micromol/L. These values were significantly different from those obtained for the PNX group. In conclusion, trans-resveratrol appears to be able to protect against the increase in SBP and subsequent cardiac hypertrophy in vivo and the mechanisms responsible may involve, at least in part, modulation of NO, AngII and ET-1 production.
authors.affiliation: Institute of Nutrition and Food Safety, Chinese Centers for Disease Control and Prevention, Beijing, China. zhpliu@yahoo.com
authors.forename: Zhaoping
authors.initials: Z
authors.lastname: Liu
authors.forename: Yan
authors.initials: Y
authors.lastname: Song
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Zhang
authors.forename: Zeqing
authors.initials: Z
authors.lastname: Liu
authors.forename: Wenzhong
authors.initials: W
authors.lastname: Zhang
authors.forename: Weifeng
authors.initials: W
authors.lastname: Mao
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Wenming
authors.initials: W
authors.lastname: Cui
authors.forename: Xin
authors.initials: X
authors.lastname: Zhang
authors.forename: Xudong
authors.initials: X
authors.lastname: Jia
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.forename: Chi
authors.initials: C
authors.lastname: Han
authors.forename: Changxing
authors.initials: C
authors.lastname: Liu
mesh_terms: D000804:Angiotensin II / Q000097:blood; D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D006332:Cardiomegaly / Q000209:etiology* / Q000473:pathology / Q000517:prevention & control*; D002317:Cardiovascular Agents; D019332:Endothelin-1 / Q000097:blood; D006977:Hypertension, Renal / Q000150:complications* / Q000209:etiology; D008297:Male; D009206:Myocardium / Q000473:pathology; D009392:Nephrectomy; D009569:Nitric Oxide / Q000097:blood; D051381:Rats; D017207:Rats, Sprague-Dawley; D000077185:Resveratrol; D013267:Stilbenes / Q000494:pharmacology*
chemical_list: D002317:Cardiovascular Agents; D019332:Endothelin-1; D013267:Stilbenes; D000804:Angiotensin II; D009569:Nitric Oxide; D000077185:Resveratrol