title: Prevalence of disease-related DNA polymorphisms among participants in a large cancer prevention trial.
abstract: Genetic susceptibility polymorphisms may be of substantial importance in the modulation of cancer risk. The prevalence for an array of polymorphic genes was determined in a cohort of male smokers who participated in a cancer prevention trial in Finland. A random sample of 120 individuals was selected from the trial cohort and the prevalence of variant alleles for nine genes was determined using a polymerase chain reaction-based approach. The prevalence values from this study were also compared with those of other populations derived from previous studies. Our results show that, with the exception of cytochrome P450-1A1 (CYP1A1) and cytochrome P450-2E1 (CYP2E1), all genes tested were sufficiently polymorphic to warrant an investigation of gene-environment studies. Most of the variant alleles, including alcohol dehydrogenase 3 (ADH3), glutathione-S-transferase (GSTM1), methionine synthase (MS), methylene tetrahydofolater reductase (MHTFR), CYP2E1 and CYP1A1, exhibited similar frequencies to other Caucasian populations. Interestingly, the prevalence of androgen receptor-CAG repeat (AR-CAG) and vitamin D receptor (VDR) polymorphisms differed significantly between the alpha-tocopherol, beta-carotene (ATBC) Study and other Caucasian populations. We present herein results from this survey and conclude that the ATBC study population in Finland is sufficiently heterogeneous to facilitate analysis of genetic polymorphisms and disease associations.
authors.affiliation: Division of Clinical Sciences, National Cancer Institute, Cancer Prevention Studies Branch, Bethesda, MD 20892-7058, USA. kw114v@nih.gov
authors.forename: K
authors.initials: K
authors.lastname: Woodson
authors.forename: D
authors.initials: D
authors.lastname: Ratnasinghe
authors.forename: N K
authors.initials: NK
authors.lastname: Bhat
authors.forename: C
authors.initials: C
authors.lastname: Stewart
authors.forename: J A
authors.initials: JA
authors.lastname: Tangrea
authors.forename: T J
authors.initials: TJ
authors.lastname: Hartman
authors.forename: R
authors.initials: R
authors.lastname: Stolzenberg-Solomon
authors.forename: J
authors.initials: J
authors.lastname: Virtamo
authors.forename: P R
authors.initials: PR
authors.lastname: Taylor
authors.forename: D
authors.initials: D
authors.lastname: Albanes
mesh_terms: D000328:Adult; D000483:Alleles; D001483:Base Sequence; D016009:Chi-Square Distribution; D015331:Cohort Studies; D019363:Cytochrome P-450 CYP1A1 / Q000032:analysis / Q000235:genetics*; D019392:Cytochrome P-450 CYP2E1 / Q000032:analysis / Q000235:genetics*; D004273:DNA, Neoplasm / Q000032:analysis*; D004789:Enzyme Activation; D005387:Finland / Q000453:epidemiology; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D009369:Neoplasms / Q000453:epidemiology / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D015995:Prevalence; D011471:Prostatic Neoplasms / Q000453:epidemiology / Q000235:genetics*; D016032:Randomized Controlled Trials as Topic; D012494:Sampling Studies; D012907:Smoking; D044465:White People / Q000235:genetics
chemical_list: D004273:DNA, Neoplasm; D019392:Cytochrome P-450 CYP2E1; D019363:Cytochrome P-450 CYP1A1