Abstract: Purpose. The relationship between inherited genetic variations in 5?-reductase type 1 (SRD5A1) and type 2 (SRD5A2) genes and the risk of biochemical recurrence after radical prostatectomy (RP) in prostate cancer (PCa) remains a fairly unexplored area of research. Patients and Methods. We studied 526 men with organ-confined and locally advanced PCa with a median follow-up time of 7.4 years. We investigated the effects of allelic variants of SRD5A1 and SRD5A2 genes and haplotype-tagging single nucleotide polymorphisms (htSNPs; n=19) on recurrence-free survival after RP using Kaplan-Meier plots, the log-rank test, and Cox proportional hazard models. Results. Upon adjusting for known prognostic clinical and pathological factors, eight htSNPs were shown to be independent predictors of recurrence. The SRD5A1 rs166050 polymorphism was associated with an increased recurrence risk of HR=1.83 (95% CI, 1.04-3.21; P=0.035), while the rs518673 in SRD5A1 was associated with a decreased risk (HR=0.59, 95% CI, 0.41-0.

Abstract: The present invention relates to a method for determining predisposition to a physiological reaction in a patient. Particularly, the present invention relates to a method for determining a predisposition to toxicity induced by a camptothecin analog or to an immunosuppressive mycophenolic acid-based therapy. This method comprises the characterization of nucleic acid sequences from the patient. The nucleic acid sequence encodes for an amino acid sequence or regulates the expression of UGT1A1, UGT1A7, UGT1A9 or their polymorphic variants. The method also comprises the analysis of haplotypic variation within these genes.