Intermittent Cold Stress Reducing the Collagen Content of Atherosclerotic Plaque in Experimental ApoE-/-Mice
10.3969/j.issn.1000-3614.2015.01.018
- VernacularTitle:间歇性低温刺激减少载脂蛋白E基因敲除小鼠动脉粥样硬化斑块内胶原含量的研究
- Author:
Xi ZHENG
;
Yongjian YANG
;
Meiqin SUN
;
Shuangtao MA
;
Liping ZHANG
;
Qiang WANG
;
Tingqiao YE
- Publication Type:Journal Article
- Keywords:
Intermittent cold stress;
Atherosclerosis;
Matrix metalloproteinase (MMP);
Collagen;
Vulnerable plaque
- From:
Chinese Circulation Journal
2015;(1):68-71
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To investigate the influence of intermittent cold stress on collagen content of atherosclerotic plaque in experimental ApoE-/-mice.
Methods: A total of 20 male ApoE-/-mice at 8 weeks of age were divided into 2 groups:Experimental group, the mice had intermittent cold exposure at (4 ± 1)°C from 8am to 12noon and Control group, the mice were living at (24 ± 2) °C. All animals were treated for 12 weeks, n=10 in each group. The collagen content of atherosclerotic plaque at the aortic root in ApoE-/-mice was observed by Masson staining, the protein expressions of aortic MMP-2, MMP-9 and TIMP-1 were examined by Western blot analysis.
Results: Compared with Control group, the Experimental group presented the lower collagen content of atherosclerotic plaque at the aortic root, higher protein expressions of MMP-2, MMP-9 and lower protein expression of TIMI 1.
Conclusion: Intermittent cold stress may disturb the balance of MMP/TIMP and decrease collagen content of atherosclerotic plaque to form vulnerable plaque in experimental ApoE-/-mice which may cause acute coronary syndrome.
