title: CYP1A2, CYP2D6, GSTM1, GSTP1, and GSTT1 gene polymorphisms in patients with bladder cancer in a Turkish population.
abstract: Genetic differences in the metabolism of xenobiotics have recently been suggested as modifiers of individual susceptibility to bladder cancer (BC). The objective of this study was to investigate the relationship between bladder tumor and variants of cytochrome p450 1A2 (CYP1A2) 734 C --> A, cytochrome p450 2D6 (CYP2D6) 1934 G --> A, glutathione S-transferase M1, (GSTM1 null), glutathione S-transferase T1 (GSTT1 null), and glutathione S-transferase P1 (GSTP1) I105 V. We investigated the distribution of these polymorphisms in 135 BC patients and in 128 age and sex-matched cancer-free controls. The polymorphisms were analyzed using polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) assay and the multiplex PCR method. Genotype and allele frequencies and their associations with BC risk, demographic factors, smoking status, and tumor stage were investigated. The prevalence of GSTT1 null genotype in cases was 23%, compared with 7% in the control group (OR = 3.94, 95% CI = 1.70-9.38, P = 0.001). There was no association between the studied polymorphisms of CYP1A2, CYP2D6, GSTM1, and GSTP1 genes and BC. There was an association between smoking status and BC. These data seem to indicate that GSTT1 gene polymorphism may be associated with BC in the Turkish population studied. Further studies will be needed to clarify the role of such variation in determining susceptibility to BC.
authors.affiliation: Department of Medical Biology and Genetics, Faculty of Medicine, Ondokuz Mayis University, 55139 Samsun, Turkey.
authors.forename: Ertan
authors.initials: E
authors.lastname: Altayli
authors.forename: Sezgin
authors.initials: S
authors.lastname: Gunes
authors.forename: Ali Faik
authors.initials: AF
authors.lastname: Yilmaz
authors.forename: Serdar
authors.initials: S
authors.lastname: Goktas
authors.forename: Yuksel
authors.initials: Y
authors.lastname: Bek
mesh_terms: D000367:Age Factors; D000368:Aged; D000428:Alcohol Drinking; D016022:Case-Control Studies; D019388:Cytochrome P-450 CYP1A2 / Q000235:genetics*; D019389:Cytochrome P-450 CYP2D6 / Q000235:genetics*; D005260:Female; D051549:Glutathione S-Transferase pi / Q000235:genetics*; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic / Q000235:genetics*; D012737:Sex Factors; D012907:Smoking; D014421:Turkey; D001749:Urinary Bladder Neoplasms / Q000235:genetics*
chemical_list: D019388:Cytochrome P-450 CYP1A2; D019389:Cytochrome P-450 CYP2D6; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase; C504573:CYP1A2 protein, human; C413545:glutathione S-transferase T1; C496556:GSTP1 protein, human