DO L-ARGININE AND L-NAME ALTER CORONARY VASCULAR AND AORTIC ENDOTHELIAL PERMEABILITY IN NORMAL- AND HIGH-CHOLESTEROL-FED RATS?
- سال انتشار: 1386
- محل انتشار: مجله آریا آترواسکلروز، دوره: 3، شماره: 2
- کد COI اختصاصی: JR_RYA-3-2_004
- زبان مقاله: انگلیسی
- تعداد مشاهده: 158
نویسندگان
MD, PhD, Department of Physiology, Isfahan University of Medical Sciences, Isfahan, Iran.
MSc. Department of Physiology, Isfahan University of Medical Sciences, Isfahan, Iran.
PhD. Department of Anatomy, Birjand university of medical sciences, Birjand, Iran.
چکیده
Abstract INTRODUCTION: The objective of this study was to evaluate the effect of L-arginine (L-Arg) and L-NAME on coronary vascular and aortic endothelial permeability in normocholesterolemic (NC) and hypercholesterolemic (HC) rats. METHODS: Forty-eight male rats were divided into NC and HC groups and each group was divided into L-Arginine-treated, L-NAME-treated and control subgroups. L-Arg (۲.۲۵%) and L-NAME (۰.۷۵ mg/ml) were dissolved in drinking water and control groups received tap water. After ۸ weeks, endothelial permeability was assessed by using the Evans Blue (EB) dye method. RESULTS: Aortic endothelial permeability was significantly higher in HC group compared to NC group (۱۵.۱±۰.۷ vs. ۷.۷±۰.۸ µgEB/g tissue, respectively; P< ۰.۰۵). L-Arg and L-NAME treatment decreased aortic endothelial permeability in HC animals (L-Arg: ۸.۴±۰.۴ & L-NAME: ۱۰.۸±۰.۶ vs. ۱۵.۱±۰.۷ µgEB/g tissue, respectively; P< ۰.۰۵). There was no significant difference in endothelial permeability in coronary circulation between HC and NC groups and L-Arg and L-NAME did not alter endothelial permeability. CONCLUSION: It seems that L-Arg and L-NAME have different effects on endothelial permeability based on physiological and pathological conditions and type of vessel. Keywords: L-Arginine, L-NAME, nitric oxide, endothelium, permeability.کلیدواژه ها
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