title: Polymorphism of the SRD5A2 gene and the risk of prostate cancer.
abstract: Androgens are actively involved in the development of the prostate gland and appear to be essential for prostate carcinogenesis. The product of the SRD5A2 gene, membrane‑bound steroid 5‑α‑reductase, type II enzyme, is key in testosterone metabolism. The present study explored the association between the SRD5A2 V89L gene polymorphism and the risk of developing prostate cancer. The study cohort consisted of 456 male Slovak patients, including 260 cases with histologically confirmed prostate cancer and 196 age‑matched controls without any clinically suspected infections of the prostate. Polymerase chain reaction-restriction fragment length polymorphism analysis was used to detect the SRD5A2 polymorphism on codon 89. Odds ratios (ORs) with corresponding 95% confidence intervals (95% CIs) for different allele variants were calculated in order to determine the association between the SRD5A2 V89L gene polymorphism and prostate cancer. The distribution of V89L variants in the control group was consistent with the Hardy‑Weinberg equilibrium (χ2 test, P=0.266) with a significant deviation in the case group (χ2 test, P=0.04). However, no association between the SRD5A2 polymorphism and an increased risk of developing prostate cancer was identified. When the wild type VV variant was used as a reference, the ORs for different allele variants ranged from 1.11 (95% CI 0.66‑1.87, P=0.70) for the LL genotype to 0.99 (95% CI 0.68‑1.46, P=0.99) for the LL + VL genotypes. No particular allele variant was identified to exhibit an increased capacity to promote the development of highly aggressive prostate cancer (Gleason ≥7) or induce carcinogenesis at an earlier onset (<65 years of age). It was confirmed that in the population studied, the SRD5A2 V89L polymorphism was not associated with the risk of prostate cancer and SRD5A2 was not shown to be a key gene involved in prostate cancer development. Published data indicate that a combination of multiple genetic changes are required for prostate cancer development, rather than a single gene change. Therefore, it was hypothesized that high-throughput genotyping may be more effective than single nucleotide polymorphism detection.
authors.affiliation: Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin 03601, Slovakia.
authors.forename: Róbert
authors.initials: R
authors.lastname: Dušenka
authors.affiliation: Department of Urology, Jessenius Faculty of Medicine and UHM, Comenius University in Bratislava, Martin 03601, Slovakia.
authors.forename: Roman
authors.initials: R
authors.lastname: Tomaškin
authors.affiliation: Department of Urology, Jessenius Faculty of Medicine and UHM, Comenius University in Bratislava, Martin 03601, Slovakia.
authors.forename: Ján
authors.initials: J
authors.lastname: Kliment
authors.affiliation: Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin 03601, Slovakia.
authors.forename: Dušan
authors.initials: D
authors.lastname: Dobrota
authors.affiliation: Department of Urology, Jessenius Faculty of Medicine and UHM, Comenius University in Bratislava, Martin 03601, Slovakia.
authors.forename: Svetlana
authors.initials: S
authors.lastname: Dušenková
authors.affiliation: Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin 03601, Slovakia.
authors.forename: Marta
authors.initials: M
authors.lastname: Vilčková
authors.affiliation: Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin 03601, Slovakia.
authors.forename: Monika Kmeť'ová
authors.initials: MK
authors.lastname: Sivoňová
mesh_terms: D013741:3-Oxo-5-alpha-Steroid 4-Dehydrogenase / Q000235:genetics*; D000483:Alleles; D016022:Case-Control Studies; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005838:Genotype; D006801:Humans; D008297:Male; D008565:Membrane Proteins / Q000235:genetics*; D008875:Middle Aged; D011110:Polymorphism, Genetic / Q000235:genetics*; D011467:Prostate / Q000473:pathology; D011471:Prostatic Neoplasms / Q000235:genetics* / Q000473:pathology; D012306:Risk; D012307:Risk Factors
chemical_list: D008565:Membrane Proteins; D013741:3-Oxo-5-alpha-Steroid 4-Dehydrogenase; C548468:SRD5A2 protein, human