Published in:
01-05-2018 | Urology - Original Paper
MicroRNA-15a expression measured in urine samples as a potential biomarker of renal cell carcinoma
Authors:
Yulian Mytsyk, Victor Dosenko, Yuriy Borys, Askold Kucher, Katarina Gazdikova, Dietrich Busselberg, Martin Caprnda, Peter Kruzliak, Ammad Ahmad Farooqi, Manyuk Lubov
Published in:
International Urology and Nephrology
|
Issue 5/2018
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Abstract
Introduction
Currently, there is no accurate diagnostic molecular biomarker for renal cell carcinoma (RCC). The aim of this study was to assess the expression of microRNA-15a (miR-15a) in urine of patients with RCC and to evaluate its potential as a diagnostic molecular biomarker.
Materials and methods
In total, 67 patients with solid renal tumors were enrolled: clear-cell RCC (ccRCC, n = 22), papillary RCC (pRCC, n = 16), chromophobe RCC (chRCC, n = 14), oncocytoma (n = 8), papillary adenoma (n = 2) and angiomyolipoma (n = 5). MiRNA-15a expression levels measurement in urine were performed using qPCR. Urine of 15 healthy volunteers without kidney pathology was used as control.
Results
We observed a difference in mean miR-15a expression values in groups of pre-operative patients with RCC, benign renal tumors and healthy persons (2.50E−01 ± 2.72E−01 vs 1.32E−03 ± 3.90E−03 vs 3.36E−07 ± 1.04E−07 RFU, respectively, p < 0.01). There was no difference in miR-15a expression between ccRCC, pRCC and chRCC (p > 0.05). Direct association between RCC size and miR-15a expression values was obtained (Pearson correlation coefficient—0.873). On the 8th day after nephrectomy, mean expression value in patients with RCC decreased by 99.53% (p < 0.01). MiR-15a expression differentiated RCC from benign renal tumors with 98.1% specificity, 100% sensitivity at a cut-off value of 5.00E−06 RFU, with AUC—0.955.
Conclusions
MiR-15a expression measured in urine may be used as diagnostic molecular biomarker for RCC.