The present invention relates to a biomarker for diagnosing diabetic nephropathy and a use thereof and, more particularly, to a marker composition for diagnosing diabetic nephropathy comprising at least one selected from the group consisting of microRNA let-7c, let-7i and microRNA-150 (miRNA-150), a composition and a kit for diagnosing diabetic nephropathy comprising an agent for measuring an expression level of the miRNA, and a method for diagnosing diabetic nephropathy using the marker. According to the present invention, microRNAs specific to the presence of renal complications can be useful as a biomarker for diagnosing diabetic nephropathy and predicting a progress thereof.;COPYRIGHT KIPO 2020
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