Effect of atorvastatin on cardiac function and TGF-β1 signaling pathway after acute myocardial infarction in rats / 南方医科大学学报
Journal of Southern Medical University
;
(12): 202-206, 2012.
Article
in Chinese
| WPRIM
| ID: wpr-267636
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of atorvastatin on cardiac remodeling and function after acute myocardial infarction (AMI) in rats and whether this effect is mediated by transforming growth factor-β1 (TGF-β1) signaling pathway.</p><p><b>METHODS</b>AMI was induced by left coronary artery ligation in 64 male Sprague-Dawley rats, and 45 surviving rats were randomized into control group (n=15), low-dose atorvastatin group (10 mg/kg, n=15) and high-dose atorvastatin group (20 mg/kg, n=15). Similar surgical procedure was performed in sham-operated rats (n=15) without coronary ligation. Atorvastatin was given daily by gavage from the first day after AMI. Eight weeks later, the cardiac function, left ventricular weight/body mass index (LVMI), collagen volume fraction (CVF), and the expressions of TGF-β1 and Smad2 were compared between the groups.</p><p><b>RESULTS</b>AMI caused significantly reduced cardiac function, increased LVMI and CVF, and upregulated expressions of TGF-β1 and Smad2 mRNA and proteins in the control group (P<0.05). The cardiac function, LVMI, and CVF were improved by atorvastatin, which also down-regulated the expressions of TGF-β1 and Smad2 (P<0.05), and the effects were more prominent in high-dose atorvastatin group (P<0.05).</p><p><b>CONCLUSION</b>Atorvastatin can dose-dependently improve cardiac remodeling and function after AMI in rats, which is mediated by regulating the activity of TGF-β1/Smad2 signaling pathway.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
Pyrroles
/
Signal Transduction
/
Rats, Sprague-Dawley
/
Ventricular Remodeling
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Smad2 Protein
/
Transforming Growth Factor beta1
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Atorvastatin
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Heart
/
Heptanoic Acids
Limits:
Animals
Language:
Chinese
Journal:
Journal of Southern Medical University
Year:
2012
Type:
Article
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