title: The erbB2/HER2/neu receptor polymorphism Ile655Val and breast cancer risk.
abstract: The erbB2 (HER2/neu) gene is found amplified in tumours. A single nucleotide polymorphism at codon 655 (Ile655Val) has been studied in a number of case-control studies with respect to breast cancer risk, with conflicting results. The aim of the present study was to examine the association between this polymorphism and breast cancer risk in a prospective, predominantly Caucasian cohort of women, the Nurses' Health Study. We genotyped the Ile655Val single nucleotide polymorphism (rs1801200) in 1271 incident breast cancer cases, and 1667 controls who were selected from the Nurses' Health Study blood cohort. Controls were matched to cases on age, menopausal status, fasting status and postmenopausal hormone use at blood draw. An inverse association was observed between the Val/Val genotype and breast cancer risk (Val/Val versus Ile/Ile odds ratio=0.68, 95% confidence interval 0.47-0.98). We conclude that this polymorphism is not associated with an increase in breast cancer risk, and may in fact be associated with a modest decrease in risk.
authors.affiliation: Department of Epidemiology, Harvard School of Public Health, Brigham and Women's Hospital and Harvard Medical School, Harvard School of Public Health, Boston, Massachusetts 02115, USA. dcox@hsph.harvard.edu
authors.forename: David G
authors.initials: DG
authors.lastname: Cox
authors.forename: Susan E
authors.initials: SE
authors.lastname: Hankinson
authors.forename: David J
authors.initials: DJ
authors.lastname: Hunter
mesh_terms: D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000097:blood / Q000453:epidemiology / Q000235:genetics*; D016022:Case-Control Studies; D015331:Cohort Studies; D004247:DNA / Q000097:blood; D005260:Female; D005787:Gene Frequency; D018734:Genes, erbB-2; D005838:Genotype; D006801:Humans; D008875:Middle Aged; D016017:Odds Ratio; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide; D011446:Prospective Studies; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000235:genetics*; D012307:Risk Factors
chemical_list: D004247:DNA; D018719:Erb-b2 Receptor Tyrosine Kinases