4.6 Article

Inhibition of development of experimental aortic abdominal aneurysm in rat model by atorvastatin through inhibition of macrophage migration

期刊

ATHEROSCLEROSIS
卷 202, 期 1, 页码 34-40

出版社

ELSEVIER IRELAND LTD
DOI: 10.1016/j.atherosclerosis.2008.03.020

关键词

Abdominal aortic aneurysm; Statin; ICAM; Macrophage; Collagen

资金

  1. Ministry of Public Health and Welfare
  2. Japan Promotion of Science
  3. Ministry of Education, Culture, Sports, Science and Technology, the Japanese Government

向作者/读者索取更多资源

Recently. atherosclerosis has been considered to be the result of inflammation. Interestingly. hydroxymethylglutaryl-coenzyme (HMG-Co) A inhibitors (statins), which are clinically used as lipid-lowering agents. have been reported to have various anti-inflammatory effects. As abdominal aortic aneurysm (AAA) is a common degenerative condition associated with atherosclerosis, this Study was designed to investigate the inhibitory effect of a statin, atorvastatin, on aneurysm formation apart from its lipid-lowering effect. We employed an elastase-induced rat AAA model, as statins do not lower cholesterol in rats. Mean aneurysm diameter was significantly smaller in the atorvastatin treatment group as compared to control at 4 weeks after surgery (P < 0.05). Interestingly, atorvastatin inhibited the expression of ICAM and MCP-1. followed by the Suppression of macrophage recruitment into the aortic wall at I week after operation. A significant reduction in MMP-12. but not MMP-2, -3 and -9. expression was also observed by treatment with atorvastatin at I week after surgery. In addition, synthesis of collagen and elastin in the vascular wall were significantly increased by atorvastatin. Here, the present Study demonstrated a direct effect of atorvastatin to inhibit the progression of aortic aneurysm, independent of its lipid-lowering effect. This study suggests new therapeutic aspects of statins to inhibit the progression of aneurysms. (C) 2008 Elsevier Ireland Ltd. All rights reserved.

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