Comparing the Reliability of Expressed Prostatic Secretion (EPS) and Post Massage Urine (PMU) for the Prediction of Prostate Cancer Biopsy Outcome

Overview

This randomized pilot phase I trial studies the best way, either expressed prostatic secretion (EPS) or post massage urine (PMU) biomarkers, of predicting biopsy results in patients undergoing prostate biopsy. Studying samples of urine in the laboratory may help doctors detect prostate cancer. It is not yet known whether EPS or PMU biomarkers are more effective in predicting prostate biopsy results

OBJECTIVES: I. To determine which non-invasive test for prostate cancer, EPS or PMU, is a better predictor of prostate cancer biopsy result. (Part I) II. To determine whether standardized testing for transmembrane protease, serine 2 (TMPRSS2):ERG Types III and VI is superior to testing for TMPRSS2:ERG Type III in predicting prostate biopsy outcome. (Part I) III. To expand the sample size utilizing the best TMPRSS2:ERG test and the best specimen type as determined in objective I and II in order to estimate with reasonable accuracy the positive predictive value (PPV) and negative predictive value (NPV) for each test. (Part II) IV. To expand the biomarker set, to include Prostate Cancer Antigen 3 (PCA3)-ribonucleic acid (RNA), d-glyceraldehyde-3-phosphate dehydrogenase (GADPH)-RNA, prostate-specific antigen (PSA)-RNA, and deoxyribonucleic acid (DNA) methylation levels at glutathione s-transferase pi (GSTP1), adenomatous polyposis coli (APC), retinoic acid receptor beta (RARB), Mitochondrial DNA (MT-DNA) Deletions and ras association (RalGDS/AF-6) domain family 1 (RASSF1), so as to develop an extensive data set for use in multivariate analysis. (Part II) V. Use multivariate analysis to determine which combination of molecular markers offers the greatest improvements in our ability to predict biopsy outcome over current baseline predictors (Serum PSA and digital rectal examination \[DRE\]). (Part II) VI. Estimate PPV and NPVs from this analysis and compare them to the standard assay's performance. (Part II) OUTLINE: Patients are randomized to 1 of 2 treatment arms. ARM I: Patients receive digital rectal palpation and then void a spontaneous urine sample for PMU analysis. Patients then undergo a prostate biopsy. ARM II: Patients receive DRE with prostatic massage for 30-60 seconds and are then milked at the urethra to provide a collection of EPS. Patients then undergo a prostate biopsy.