Rosuvastatin Suppresses the Oxidative Response in the Venous Limb of an Arteriovenous Fistula and Enhances the Fistula Blood Flow in Diabetic Rats

• Published in: Journal of vascular research Vol. 51; no. 2; pp. 81 - 89
• Main Authors: Fang, Shih-Yuan, Roan, Jun-Neng, Lin, Yu, Hsu, Chih-Hsin, Chang, Shih-Wei, Huang, Chein-Chi, Tsai, Yu-Chuan, Lam, Chen-Fuh
• Format: Journal Article
• Language: English
• Published: Basel, Switzerland S. Karger AG 01.01.2014
• Subjects: Animals; Anti-Inflammatory Agents - pharmacology; Antioxidants - pharmacology; Aorta, Abdominal - physiopathology; Aorta, Abdominal - surgery; Arteriovenous Shunt, Surgical - adverse effects; Blood Flow Velocity; Diabetes Mellitus, Experimental - blood; Diabetes Mellitus, Experimental - complications; Diabetes Mellitus, Experimental - physiopathology; Diabetes Mellitus, Type 1 - blood; Diabetes Mellitus, Type 1 - complications; Diabetes Mellitus, Type 1 - physiopathology; Fluorobenzenes - pharmacology; Graft Occlusion, Vascular - blood; Graft Occlusion, Vascular - diagnosis; Graft Occlusion, Vascular - etiology; Graft Occlusion, Vascular - physiopathology; Graft Occlusion, Vascular - prevention & control; Hydroxymethylglutaryl-CoA Reductase Inhibitors - pharmacology; Inflammation Mediators - blood; Neointima; Oxidative Stress - drug effects; Pyrimidines - pharmacology; Rats; Rats, Sprague-Dawley; Regional Blood Flow; Research Paper; Rosuvastatin Calcium; Sulfonamides - pharmacology; Superoxides - blood; Time Factors; Vena Cava, Inferior - drug effects; Vena Cava, Inferior - metabolism; Vena Cava, Inferior - pathology; Vena Cava, Inferior - physiopathology; Vena Cava, Inferior - surgery; Arteriovenous shunt; Hemodialysis; HMG-CoA reductase inhibitors; Superoxide; Inflammation; Peripheral vascular diseases; Intimal hyperplasia
• ISSN: 1018-1172; 1423-0135; 1423-0135
• DOI: 10.1159/000357619

Objective: The blood flow in the arteriovenous (AV) fistula is significantly reduced in diabetic patients. Statins are known to mediate pleiotropic effects in the vascular endothelium and attenuate inflammatory responses. This study tested the vascular protective effect of rosuvastatin in an experimental model of AV fistula. Methods: One week after the induction of diabetes mellitus (DM) in rats, a fistula was created in the abdominal aorta and inferior vena cava. Rats received placebo or rosuvastatin (15 mg/kg/day) in chow for 2 weeks. The blood flow in the venous segments of the fistula was measured. The expression of proinflammatory genes and the generation of superoxide in the venous fistula were examined. Results: The blood flow and luminal diameter of the AV fistula was significantly enhanced in animals treated with rosuvastatin. Rosuvastatin attenuated the expression of inducible nitric oxide synthase, NADPH oxidase, and monocyte chemotactic protein-1 in the fistula. The levels of superoxide anions and proinflammatory cytokines were also suppressed in rosuvastatin-treated animals. Neointimal formation in the AV fistula was not affected following treatment with rosuvastatin. Conclusions: We demonstrated that rosuvastatin improves luminal dilatation and blood flow in the AV fistula of subjects with DM. These vascular protective effects of rosuvastatin are most likely mediated by the attenuation of proinflammatory activities in the remodeled vasculature.