Altered expression of microRNAs in the myocardium of rats with acute myocardial infarction.
BACKGROUND
MicroRNAs(miRNAs) are important cellular components and their dysfunction is associated with various diseases. Acute myocardial infarction (AMI) is one of the most serious cardiovascular diseases. Although several miRNAs are reported to be associated with AMI, more novel miRNAs are needed to further investigate and improve certainty


METHODS
We applied a well-established acute myocardial infarction rat model and performed miRNAs microarray experiments upon the myocardium tissue of rats with AMI and under sham control. We identified the differentially expressed miRNAs and analyzed the function of miRNA targets, transcription factors, and host genes based on bioinformatics.


RESULTS
As a result, the levels of expression of seventeen miRNAs significantly deregulated, of which four miRNAs were further validated by qRT-PCR. In addition, we observed that the transcription factors, targets, and host genes of these deregulated miRNAs are enriched in cardiovascular-related functions.


CONCLUSIONS
We found that the miRNAs expression level altered in rats with AMI and differentially expressed miRNAs may be novel biomarkers of AMI.
Shi
Bing
B
Department of Cardiology, Peking University Third Hospital, Beijing, China.
Guo
Yanhong
Y
Wang
Juan
J
Gao
Wei
W
D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D005786:Gene Expression Regulation; D035683:MicroRNAs / Q000096:biosynthesis* / Q000235:genetics; D009203:Myocardial Infarction / Q000235:genetics* / Q000378:metabolism*; D009206:Myocardium / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley
D015415:Biomarkers; D035683:MicroRNAs