Abstract
Vascular intimal hyperplasia is associated with increased mortality and morbidity. The authors investigated the effects of atorvastatin on vascular intimal hyperplasia. Rats were divided into 4 groups. Groups 1, 2, and 3 had experimental aortic injury and received intraperitoneal injection of atorvastatin, solvent, or 0.9% NaCl, respectively. Group 4 was a nonintervention (laparotomy only) control group. Animals were sacrificed after 3 weeks. Blood samples and injured aortic segment were analyzed. Atorvastatin administration significantly lowered total and low-density lipoprotein cholesterol levels (P = .012 and P = .001, respectively), intima-media ratio (P = .002), and intimal smooth muscle cell accumulation (P < .05) in group 1. Luminal narrowing in animals in group 1 was significantly lower than that in animals in groups 2 and 3, but was higher than in animals in group 4 (P = .009). Atorvastatin suppresses intimal hyerplasia and aids in intimal regeneration by lowering blood lipids and intimal smooth muscle cell accumulation.
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