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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Eur+J+Clin+Invest 2015 ; 45 (4): 394-404 Nephropedia Template TP
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Circulating and urinary microRNA profile in focal segmental glomerulosclerosis: a pilot study #MMPMID25682967
Ramezani A; Devaney JM; Cohen S; Wing MR; Scott R; Knoblach S; Singhal R; Howard L; Kopp JB; Raj DS
Eur J Clin Invest 2015[Apr]; 45 (4): 394-404 PMID25682967show ga
Background: MicroRNAs (miRNAs) are non-coding RNA molecules that play important roles in the pathogenesis of various kidney diseases. We investigated whether patients with minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS) have distinct circulating and urinary miRNA expression profiles that could lead to potential development of noninvasive biomarkers of the disease. Materials and methods: Exosome miRNAs were extracted from plasma and urine samples of patients with primary FSGS (n=16) or MCD (n=5) and healthy controls (n=5). Differences in miRNA abundance were examined using Affymetrix GeneChip miRNA 3.0 arrays. QRT-PCR was used to validate the findings from the array. Results: Comparison analysis of FSGS versus MCD revealed 126 and 155 differentially expressed miRNAs in plasma and in urine, respectively. Only 38 of these miRNAs were previously cited, whereas the remaining miRNAs have not been described. Comparison analysis showed that a significant number of miRNAs were down-regulated in both plasma and urine samples of FSGS patients compared to those with MCD. Plasma levels of miR-30b, miR-30c, miR-34b, miR-34c, and miR-342, and urine levels of mir-1225-5p were up-regulated in MCD patients compared to FSGS patients and controls (p<0.001). Urinary levels of mir-1915 and miR-663 were down-regulated in FSGS patients compared to MCD and controls (p<0.001), whereas the urinary levels of miR-155 were up-regulated in FSGS patients when compared to MCD patients and controls (p<0.005). Conclusions: Patients with FSGS and MCD have a unique circulating and urinary miRNA profile. The diagnostic and prognostic potential of miRNAs in FSGS and MCD warrants further studies.