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• W2015399672 abstract "Carvedilol, a nonselective β-adrenoreceptor antagonist, protects against myocardial injury induced by acute myocardium infarction (AMI). The mechanisms underlying the anti-fibrotic effects of carvedilol are unknown. Recent studies have revealed the critical role of microRNAs (miRNAs) in a variety of cardiovascular diseases. This study investigated whether miR-29b is involved in the cardioprotective effect of carvedilol against AMI-induced myocardial fibrosis. Male SD rats were randomized into several groups: the sham surgery control, left anterior descending (LAD) surgery-AMI model, AMI plus low-dose carvedilol treatment (1 mg/kg per day, CAR-L), AMI plus medium-dose carvedilol treatment (5 mg/kg per day, CAR-M) and AMI plus high-dose carvedilol treatment (10 mg/kg per day, CAR-H). Cardiac remodeling and impaired heart function were observed 4 weeks after LAD surgery treatment; the observed cardiac remodeling, decreased ejection fraction, and fractional shortening were rescued in the CAR-M and CAR-H groups. The upregulated expression of Col1a1, Col3a1, and α-SMA mRNA was significantly reduced in the CAR-M and CAR-H groups. Moreover, the downregulated miR-29b was elevated in the CAR-M and CAR-H groups. The in vitro study showed that Col1a1, Col3a1, and α-SMA were downregulated and miR-29b was upregulated by carvedilol in a dose-dependent manner in rat cardiac fibroblasts. Inhibition of ROS-induced Smad3 activation by carvedilol resulted in downregulation of Col1a1, Col3a1, and α-SMA and upregulation of miR-29b derived from the miR-29b-2 precursor. Enforced expression of miR-29b significantly suppressed Col1a1, Col3a1, and α-SMA expression. Taken together, we found that smad3 inactivation and miR-29b upregulation contributed to the cardioprotective activity of carvedilol against AMI-induced myocardial fibrosis." @default.
• W2015399672 created "2016-06-24" @default.
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• W2015399672 date "2013-09-25" @default.
• W2015399672 modified "2023-10-16" @default.
• W2015399672 title "Smad3 Inactivation and MiR-29b Upregulation Mediate the Effect of Carvedilol on Attenuating the Acute Myocardium Infarction-Induced Myocardial Fibrosis in Rat" @default.
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• W2015399672 doi "https://doi.org/10.1371/journal.pone.0075557" @default.
• W2015399672 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3783413" @default.
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