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Fan, Pei-Chun; Chen, Chia-Chun; Peng, Chen-Ching; Chang, Chih-Hsiang; Yang, Chia-Hung; Yang, Chi; Chu, Lichieh Julie; Chen, Yung-Chang; Yang, Chih-Wei; Chang, Yu-Sun; Chu, Pao-Hsien
Journal of translational medicine, 04/2019, Volume: 17, Issue: 1Journal Article
Acute kidney injury (AKI) is a common complication of acute myocardial infarction (AMI), and is associated with adverse outcomes. The study aimed to identify a miRNA signature for the early diagnosis of post-AMI AKI. A total of 108 patients admitted to a coronary care unit (CCU) were divided into four subgroups: AMI AKI , AMI AKI , AMI AKI , and AMI AKI . Thirty-six miRNA candidates were selected based on an extensive literature review. Real-time quantitative RT-PCR analysis was used to determine the expression levels of these miRNAs in the serum collected on the day of CCU admittance. TargetScan 7.1 and miRDB databases were used for target prediction and Metacore 6.13 was used for pathway analysis. Through a stepwise selection based on abundance, hemolytic effect and differential expression between four groups, 9 miRNAs were found to have significantly differential expression levels as potential biomarkers for post-AMI AKI specifically. Noticeably, the expression levels of miR-24, miR-23a and miR-145 were significantly down-regulated in AMI AKI patients compared to those in AMI AKI patients. Combination of the three miRNAs as a panel showed the best performance in the early detection of AKI following AMI (AUC = 0.853, sensitivity 95.65%), compared to the analysis of serum neutrophil gelatinase-associated lipocalin (AUC = 0.735, sensitivity 63.16%). Furthermore, bioinformatic analysis indicated that these three miRNAs regulate the transforming growth factor beta signaling pathway and involve in apoptosis and fibrosis in AKI. For the first time, this study identify a unique circulating miRNA signature (miR-24-3p, miR-23a-3p, miR-145-5p) that can potentially early detect AKI following AMI and may be involved in renal injury and fibrosis in post-AMI AKI pathogenesis.
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