miR-34b-3p is a biomarker of prostate cancer progression.

<p><b>A)</b> Receiver operating characteristic (ROC) curves were used to test the accuracy of miRNAs to identify patients who had PSA failure during follow-up. AUC; Area under the curve; CI, Confidence interval. <b>B</b>) MiR-31, 34b-3p, 205, 224 and miR-452 expression was evaluated by qPCR in unpaired pre-cancerous glands (PIN, n = 50), neoplastic prostate lesions (PCa, n = 66), or benign hyperplastic tissues (BPH, n = 10). **, p = 0.0027; ***, p<0.001, all by Mann-Whitney test. Bars, mean±SEM. RQ, relative miRNA quantity.