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Urinary Exosomal miRNA Signature in Type II Diabetic Nephropathy Patients
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Urinary Exosomal miRNA Signature in Type II Diabetic Nephropathy Patients
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Journal Article
Urinary Exosomal miRNA Signature in Type II Diabetic Nephropathy Patients
2016
Overview
MicroRNAs (miRNAs) are short non-coding RNA species which are important post-transcriptional regulators of gene expression and play an important role in the pathogenesis of diabetic nephropathy. miRNAs are present in urine in a remarkably stable form packaged in extracellular vesicles, predominantly exosomes. In the present study, urinary exosomal miRNA profiling was conducted in urinary exosomes obtained from 8 healthy controls (C), 8 patients with type II diabetes (T2D) and 8 patients with type II diabetic nephropathy (DN) using Agilent´s miRNA microarrays. In total, the expression of 16 miRNA species was deregulated (>2-fold) in DN patients compared to healthy donors and T2D patients: the expression of 14 miRNAs (miR-320c, miR-6068, miR-1234-5p, miR-6133, miR-4270, miR-4739, miR-371b-5p, miR-638, miR-572, miR-1227-5p, miR-6126, miR-1915-5p, miR-4778-5p and miR-2861) was up-regulated whereas the expression of 2 miRNAs (miR-30d-5p and miR-30e-5p) was down-regulated. Most of the deregulated miRNAs are involved in progression of renal diseases. Deregulation of urinary exosomal miRNAs occurred in micro-albuminuric DN patients but not in normo-albuminuric DN patients. We used qRT-PCR based analysis of the most strongly up-regulated miRNAs in urinary exosomes from DN patients, miRNAs miR-320c and miR-6068. The correlation of miRNA expression and micro-albuminuria levels could be replicated in a confirmation cohort. In conclusion, urinary exosomal miRNA content is altered in type II diabetic patients with DN. Deregulated miR-320c, which might have an impact on the TGF-β-signaling pathway via targeting thrombospondin 1 (TSP-1) shows promise as a novel candidate marker for disease progression in type II DN that should be evaluated in future studies.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Aged
/ Analysis
/ Diabetes
/ Diabetes Mellitus, Type 2 - genetics
/ Diabetes Mellitus, Type 2 - metabolism
/ Diabetes Mellitus, Type 2 - urine
/ Diabetic Nephropathies - genetics
/ Diabetic Nephropathies - metabolism
/ Diabetic Nephropathies - urine
/ Exosomes
/ Female
/ Humans
/ Male
/ Medicine
/ Medicine and Health Sciences
/ MicroRNA
/ miRNA
/ Patients
/ RNA
/ Rodents
/ Signal Transduction - physiology
/ Studies
/ Urine
