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Down regulation of aortic nitric oxide and antioxidant systems in chronic alcohol-induced hypertension in rats.
Hum Exp Toxicol. 2007 May; 26(5):427-34.HE

Abstract

The aim of this study was to investigate the relationship between chronic ethanol-induced increase in blood pressure (BP) and alterations in the aortic nitric oxide (NO) and the antioxidant systems in rats. Male Fisher rats (200-250 g) were divided into two groups of six animals each and treated as follows: 1) control (5% sucrose, orally) daily for 12 weeks and 2) 20% ethanol (4 g/kg, orally) daily for 12 weeks. The BP (systolic, diastolic and mean) was recorded every week through tail-cuff method. The animals were sacrificed 12 weeks after treatments and thoracic aorta was collected and analysed. The results show that systolic, diastolic and mean BP was significantly elevated 12 weeks after ethanol ingestion in rats compared to control. The endothelial nitric oxide synthase (eNOS) and vascular endothelial growth factor (VEGF) expressions were down-regulated (50-55% of control) leading to depletion of aortic NO levels (69% of control) in ethanol treated rats compared to control. The ratio of reduced to oxidized glutathione (GSH/GSSG) was significantly depleted (58% of control) in the aorta of ethanol-treated rats compared to control. The decrease in aortic GSH/GSSG ratio was good correlated with increase in BP (r = 0.69). The antioxidant enzymes: copper/zinc-superoxide dismutase (CuZn-SOD) and manganese (Mn)-SOD, catalase (CAT) and glutathione peroxidase (GSH-Px) activities were significantly depressed (36-53% of control) in the aorta of ethanol-treated rats compared to control. The study concluded that chronic ethanol ingestion induces hypertension which relates to the vascular endothelial dysfunction on account of the down-regulation of aortic endothelial antioxidants and NO generating system in rats.

Authors+Show Affiliations

Department of Physiology, Pharmacology and Toxicology, Ponce School of Medicine, Ponce, PR 00732, USA. khusain@psm.eduNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

17623767

Citation

Husain, Kazim, et al. "Down Regulation of Aortic Nitric Oxide and Antioxidant Systems in Chronic Alcohol-induced Hypertension in Rats." Human & Experimental Toxicology, vol. 26, no. 5, 2007, pp. 427-34.
Husain K, Vazquez-Ortiz M, Lalla J. Down regulation of aortic nitric oxide and antioxidant systems in chronic alcohol-induced hypertension in rats. Hum Exp Toxicol. 2007;26(5):427-34.
Husain, K., Vazquez-Ortiz, M., & Lalla, J. (2007). Down regulation of aortic nitric oxide and antioxidant systems in chronic alcohol-induced hypertension in rats. Human & Experimental Toxicology, 26(5), 427-34.
Husain K, Vazquez-Ortiz M, Lalla J. Down Regulation of Aortic Nitric Oxide and Antioxidant Systems in Chronic Alcohol-induced Hypertension in Rats. Hum Exp Toxicol. 2007;26(5):427-34. PubMed PMID: 17623767.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Down regulation of aortic nitric oxide and antioxidant systems in chronic alcohol-induced hypertension in rats. AU - Husain,Kazim, AU - Vazquez-Ortiz,Manuel, AU - Lalla,Jainarine, PY - 2007/7/12/pubmed PY - 2007/8/10/medline PY - 2007/7/12/entrez SP - 427 EP - 34 JF - Human & experimental toxicology JO - Hum Exp Toxicol VL - 26 IS - 5 N2 - The aim of this study was to investigate the relationship between chronic ethanol-induced increase in blood pressure (BP) and alterations in the aortic nitric oxide (NO) and the antioxidant systems in rats. Male Fisher rats (200-250 g) were divided into two groups of six animals each and treated as follows: 1) control (5% sucrose, orally) daily for 12 weeks and 2) 20% ethanol (4 g/kg, orally) daily for 12 weeks. The BP (systolic, diastolic and mean) was recorded every week through tail-cuff method. The animals were sacrificed 12 weeks after treatments and thoracic aorta was collected and analysed. The results show that systolic, diastolic and mean BP was significantly elevated 12 weeks after ethanol ingestion in rats compared to control. The endothelial nitric oxide synthase (eNOS) and vascular endothelial growth factor (VEGF) expressions were down-regulated (50-55% of control) leading to depletion of aortic NO levels (69% of control) in ethanol treated rats compared to control. The ratio of reduced to oxidized glutathione (GSH/GSSG) was significantly depleted (58% of control) in the aorta of ethanol-treated rats compared to control. The decrease in aortic GSH/GSSG ratio was good correlated with increase in BP (r = 0.69). The antioxidant enzymes: copper/zinc-superoxide dismutase (CuZn-SOD) and manganese (Mn)-SOD, catalase (CAT) and glutathione peroxidase (GSH-Px) activities were significantly depressed (36-53% of control) in the aorta of ethanol-treated rats compared to control. The study concluded that chronic ethanol ingestion induces hypertension which relates to the vascular endothelial dysfunction on account of the down-regulation of aortic endothelial antioxidants and NO generating system in rats. SN - 0960-3271 UR - https://www.unboundmedicine.com/medline/citation/17623767/Down_regulation_of_aortic_nitric_oxide_and_antioxidant_systems_in_chronic_alcohol_induced_hypertension_in_rats_ L2 - https://journals.sagepub.com/doi/10.1177/0960327106072993?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -