Objective:The study aimed to investigate differentially expressed microRNAs(miRNAs)and their association with left ventricular end-diastolic dimension(LVEDd),left ventricular ejection fraction(LVEF),N-terminal of the prohormone brain natriuretic peptide(NT-proBNP)in human dilated cardiomyopathy(DCM)by miRNAs array,and to predict their target gene. Methods:The expression levels of plasma miRNAs of 8 DCM patients and 4 healthy controls were detected by using the Agilent human miRNAs array(V19.0),followed by real-time RT-PCR analysis to validate the expression changes of miRNAs. NT-proBNP,LVEDd and LVEF were measured and analyzed using Pearson linear correlation analysis. The prediction analysis for microarrays(PAM)method was used to identify the differentially expressed miRNAs. Results:Thirty-six differentially expressed miRNAs were identified. There were 25 upregulated and 11 downregulated human miRNAs,of which miR-5196-5p and miR-652-5p were the most significant. Pearson linear correlation analysis showed that miR-5196-5p level was positively correlated with LVEDd,whereas miR-652-5p was positively correlated with LVEF values and negatively correlated with NT-proBNP and LVEDd. Moreover,correlative genes such as VCL and RBM20 related with DCM were predicted. Conclusion:The screened differentially expressed miRNAs may be involved in the development of DCM. Specific miRNAs,such as miR-5196-5p and miR-652-5p,may be considered as new targets for the diagnosis and treatment of human DCM.