title: Progesterone receptor gene polymorphism is associated with decreased risk for breast cancer by age 50.
abstract: In a population-based case-control study for breast cancer before the age of 51 years, 554 cases and 559 age-matched controls were genotyped for the polymorphic progesterone receptor allele PROGINS. Breast cancer risk was decreased in women carrying the PROGINS allele. The odds ratio adjusted for age and study region was 0.76 [95% confidence interval (CI), 0.58-1.00]. Compared with wild-type A1/A1 homozygotes, the odds ratio for A1/A2 heterozygotes and A2/A2 homozygotes was 0.82 (95% CI, 0.62-1.08) and 0.27 (95% CI, 0.10-0.74), respectively, suggesting a gene dosage effect of the A2 allele. There was suggestive evidence for a differential effect by menopausal status (P = 0.07) and by family history of breast cancer (P = 0.15).
authors.affiliation: Department of Obstetrics and Gynecology, University of Ulm, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Wang-Gohrke
authors.forename: J
authors.initials: J
authors.lastname: Chang-Claude
authors.forename: H
authors.initials: H
authors.lastname: Becher
authors.forename: D G
authors.initials: DG
authors.lastname: Kieback
authors.forename: I B
authors.initials: IB
authors.lastname: Runnebaum
mesh_terms: D000328:Adult; D000367:Age Factors; D000483:Alleles; D001943:Breast Neoplasms / Q000235:genetics*; D016022:Case-Control Studies; D002880:Chromosomes, Human, Pair 11; D005091:Exons; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D015810:Linkage Disequilibrium; D008875:Middle Aged; D009154:Mutation; D011110:Polymorphism, Genetic; D020033:Protein Isoforms; D011980:Receptors, Progesterone / Q000235:genetics*; D012307:Risk Factors
chemical_list: D020033:Protein Isoforms; D011980:Receptors, Progesterone