Abstract | UNLABELLED:
Simvastatin can prevent cardiac remodelling after myocardial infarction, though the exact mechanisms are uncertain. Myocardial no-reflow is associated with progressive cardiac remodelling. However, it remains unknown whether post- infarction treatment with simvastatin can also reduce myocardial no-reflow for which suppression of adenosine triphosphate-sensitive K+ (K( ATP)) channel opening is an important mechanism. METHODS: Area at risk and the area of no-reflow were determined by myocardial contrast echocardiography (MCE) and by pathology in 45 mini-swine randomised into 5 groups: 10 control, 9 simvastatin, 9 glibenclamide, 9 simvastatin plus glibenclamide and 8 sham-operated. A myocardial infarction and reperfusion model was created by 3-h occlusion of the coronary artery followed by 4 weeks of reperfusion. RESULTS: Compared with the control group, simvastatin significantly increased coronary blood volume (P<0.01) and decreased the area of no-reflow measured by MCE (78.5+/-4.5% to 43.7+/-4.3%) and pathological evaluation (82.3+/-1.9% to 45.2+/-3.8%) of area at risk (P<0.01). Simvastatin also increased the levels of K( ATP) channel proteins (SUR2 and Kir6.2) (P<0.05), but had no effect on necrosis area. The combination of simvastatin and glibenclamide had no significant effect on the above parameters. CONCLUSIONS: Post- infarction treatment with simvastatin can reduce myocardial no-reflow. This beneficial effect is due to activation of the K( ATP) channel.
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Authors | Yue-Jin Yang, Jing-Lin Zhao, Shi-Jie You, Yong-Jian Wu, Zhi-Cheng Jing, Run-Lin Gao, Zai-Jia Chen |
Journal | European journal of heart failure
(Eur J Heart Fail)
Vol. 9
Issue 1
Pg. 30-6
(Jan 2007)
ISSN: 1388-9842 [Print] England |
PMID | 16829188
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antigens, CD
- Cadherins
- Hydroxymethylglutaryl-CoA Reductase Inhibitors
- KATP Channels
- Kir6.2 channel
- Potassium Channels, Inwardly Rectifying
- cadherin 5
- uK-ATP-1 potassium channel
- Cholesterol
- Simvastatin
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Topics |
- Animals
- Antigens, CD
- Cadherins
- Cardiac Output
(drug effects)
- Cholesterol
(blood)
- Disease Models, Animal
- Electrocardiography
- Hydroxymethylglutaryl-CoA Reductase Inhibitors
(therapeutic use)
- KATP Channels
- Myocardial Infarction
(drug therapy, pathology)
- Potassium Channels, Inwardly Rectifying
(physiology)
- Simvastatin
(therapeutic use)
- Swine
- Swine, Miniature
- Ventricular Function, Left
(drug effects)
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