Diagnosis of dilated cardiomyopathy in children based on microRNA sequencing technology / 中华实用儿科临床杂志

ABSTRACT

Objective:To investigate the correlation between specific expression of serum micro ribonucleic acid (miRNA) and dilated cardiomyopathy (DCM) in children.Methods:Sixteen children diagnosed with DCM in Pediatric Heart Center of Beijing Anzhen Hospital from November 2013 to March 2016 were enrolled in the DCM group.Meanwhile, 12 age- and gender-matched healthy children who underwent medical examinations at the same time in the same hospital were selected as the healthy control group.Their serum was collected and miRNA sequencing was performed.The sample size was expanded at the later stage (the DCM group included 30 cases, and the healthy control group included 16 cases). The real-time fluorescence quantitative polymerase chain reaction (qRT-PCR) verification experiment was conducted on 11 miRNAs with statistically significant sequencing results.Results:Serum miRNA sequencing showed that 172 miRNAs were up-regulated but no miRNAs were down-regulated in the DCM group, compared with the healthy control group (fold change>2, P<0.001). Top 11 significantly up-regulated miRNAs were verified by qRT-PCR, and it was found that 8 of the 11 miRNAs (let-7f, let-7g, miR142-5p, miR143-3p, miR26a, miR27a-3p, miR27b-3p, and miR126-3p) in the DCM group were significantly up-regulated (all P<0.05). In the receiver operating characteristic (ROC) curves of DCM patients, the area under the curves of serum miR142-5p, miR143-3p, miR27b-3p, and miR126-3p were 0.983, 0.992, 0.915 and 0.950, respectively, which were statistically significantly different from those of the healthy control group (all P<0.05). Conclusions:Four serum miRNAs (miR-142-5p, miR-126-3p, miR-143-3p and miR-27b-3p) can distinguish children with DCM from healthy children.Circulating miRNAs are effective in screening DCM children.