MicroRNAs in urine are not biomarkers of multiple myeloma.

BACKGROUND: In this study, we aimed to identify microRNA from urine of multiple myeloma patients that could serve as a biomarker for the disease. RESULTS: Analysis of urine samples was performed using Serum/Plasma Focus PCR MicroRNA Panel (Exiqon) and verified using individual TaqMan miRNA assays for qPCR. We found 20 deregulated microRNA (p < 0.05); for further validation, we chose 8 of them. Nevertheless, only differences in expression levels of miR-22-3p remained close to statistical significance. CONCLUSIONS: Our preliminary results did not confirm urine microRNA as a potential biomarker for multiple myeloma.