Microsomal epoxide hydrolase polymorphisms, cigarette smoking and prostate cancer risk in the Slovak population

Microsomal epoxide hydrolase polymorphisms, cigarette smoking and prostate cancer risk in the Slovak population

Polymorphisms in tobacco carcinogen metabolizing enzymes may generate interindividual variations towards the risk of developing prostate cancer. One of these enzymes is microsomal epoxide hydrolase (EPHX1) which metabolizes polycyclic aromatic hydrocarbons, or PAH, carcinogens found in cigarette smo...

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Bibliographic Details
Published in:Neoplasma Vol. 59; no. 1; p. 79
Main Authors: Sivonova, M Kmetov, Dobrota, D, Matakova, T, Dusenka, R, Grobarcikova, S, Habala, V, Salagovic, J, Tajtakova, M, Pidanicova, A, Valansky, L, Lachvacs, L, Kliment, Jr, J, Nagy, V, Kliment, J
Format: Journal Article
Language:English
Published: Slovakia 2012
Subjects:
Adenocarcinoma - epidemiology
Adenocarcinoma - genetics
Adult
Aged, 80 and over
Amino Acid Substitution
Biotransformation - genetics
Case-Control Studies
Epoxide Hydrolases - genetics
Exons - genetics
Gene Frequency
Genetic Predisposition to Disease
Genotype
Humans
Male
Microsomes - enzymology
Middle Aged
Neoplasm Proteins - genetics
Polymorphism, Single Nucleotide
Prostatic Neoplasms - epidemiology
Prostatic Neoplasms - genetics
Risk
Slovakia - epidemiology
Smoking - epidemiology
Smoking - genetics
Slovakia
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Summary:Polymorphisms in tobacco carcinogen metabolizing enzymes may generate interindividual variations towards the risk of developing prostate cancer. One of these enzymes is microsomal epoxide hydrolase (EPHX1) which metabolizes polycyclic aromatic hydrocarbons, or PAH, carcinogens found in cigarette smoke. The activity of this enzyme is affected by two polymorphisms, a substitution of Tyr113 by His in exon 3 and a substitution of His139 by Arg in exon 4. The aim of this study was to use a population-based case-control study to investigate whether or not such genetic polymorphisms in EPHX1 gene can modify the relationship between smoking status and the risk of developing prostate cancer. We used restriction fragment length polymorphism, or PCR-RFLP to determine EPHX1 genotypes in subjects comprising 194 patients with histologically verified prostate cancer and 305 healthy individuals as control. We found no overall association between prostate cancer risk and functional polymorphisms of EPHX1 gene in exon 3 and exon 4. We further analysed the association between the EPHX1 genotypes and smoking. Smokers carrying the exon 3 Tyr/Tyr and Tyr/His genotypes were at no significant risk compared to non-smokers with the "rapid" Tyr/Tyr genotype. By contrast, a significant interaction of smoking and the exon 4 polymorphism was present.
ISSN:0028-2685
DOI:10.4149/neo_2012_010