This study presents a critical appraisal of previously published study data of miRNAs in blood, urine and exosomes as biomarkers of bladder cancer (BC). The evaluation included 39 articles published from the beginning of 2010 until September 2017 and searched in PubMed. The heterogeneity of studies, due to their clinicopathological variability, including insufficient consideration of diagnostic and prognostic biomarker guidelines and missing internal and external validation of data, do not currently allow the recommending of a useful miRNA marker as diagnostic or prognostic tool in BC. Future multi-institutional studies are necessary to overcome the deficiencies in these studies in order to prove the usefulness of circulating miRNAs as robust biomarkers for BC.
Biomarkers in medicine. 2018 Jun 13 [Epub ahead of print]
Angelika Tölle, Conrad C Blobel, Klaus Jung
Department of Urology, Charité - Universitätsmedizin Berlin, 10117 Berlin, Germany., Berlin Institute for Urologic Research, 10117 Berlin, Germany.