title: DNA repair variants and breast cancer risk.
abstract: A functional DNA repair system has been identified as important in the prevention of tumour development. Previous studies have hypothesized that common polymorphisms in DNA repair genes could play a role in breast cancer risk and also identified the potential for interactions between these polymorphisms and established breast cancer risk factors such as physical activity. Associations with breast cancer risk for 99 single nucleotide polymorphisms (SNPs) from genes in ten DNA repair pathways were examined in a case-control study including both Europeans (644 cases, 809 controls) and East Asians (299 cases, 160 controls). Odds ratios in both additive and dominant genetic models were calculated separately for participants of European and East Asian ancestry using multivariate logistic regression. The impact of multiple comparisons was assessed by correcting for the false discovery rate within each DNA repair pathway. Interactions between several breast cancer risk factors and DNA repair SNPs were also evaluated. One SNP (rs3213282) in the gene XRCC1 was associated with an increased risk of breast cancer in the dominant model of inheritance following adjustment for the false discovery rate (P < 0.05), although no associations were observed for other DNA repair SNPs. Interactions of six SNPs in multiple DNA repair pathways with physical activity were evident prior to correction for FDR, following which there was support for only one of the interaction terms (P < 0.05). No consistent associations between variants in DNA repair genes and breast cancer risk or their modification by breast cancer risk factors were observed.
authors.affiliation: CRCHUM (Centre de Recherche du CHUM), Montreal, Quebec, Canada.
authors.forename: Anne
authors.initials: A
authors.lastname: Grundy
authors.affiliation: Department of Public Health Sciences and Cancer Research Institute, Queen's University, Kingston, Ontario, Canada.
authors.forename: Harriet
authors.initials: H
authors.lastname: Richardson
authors.affiliation: Canada's Michael Smith Genome Sciences Centre, British Columbia Cancer Agency, Vancouver, British Columbia, Canada.
authors.forename: Johanna M
authors.initials: JM
authors.lastname: Schuetz
authors.affiliation: Department of Environmental and Occupational Health, Drexel University, Philadelphia, Pennsylvania.
authors.forename: Igor
authors.initials: I
authors.lastname: Burstyn
authors.affiliation: Department of Cancer Control Research, British Columbia Cancer Agency, Vancouver, British Columbia, Canada.|School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada.
authors.forename: John J
authors.initials: JJ
authors.lastname: Spinelli
authors.affiliation: Canada's Michael Smith Genome Sciences Centre, British Columbia Cancer Agency, Vancouver, British Columbia, Canada.|Department of Physiology and Kinesiology, Simon Fraser University, Burnaby, British Columbia, Canada.
authors.forename: Angela
authors.initials: A
authors.lastname: Brooks-Wilson
authors.affiliation: Department of Public Health Sciences and Cancer Research Institute, Queen's University, Kingston, Ontario, Canada.
authors.forename: Kristan J
authors.initials: KJ
authors.lastname: Aronson
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People / Q000235:genetics; D001940:Breast / Q000473:pathology*; D001943:Breast Neoplasms / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics*; D016022:Case-Control Studies; D004260:DNA Repair; D004268:DNA-Binding Proteins / Q000235:genetics; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D016015:Logistic Models; D008875:Middle Aged; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide; D012307:Risk Factors; D044465:White People / Q000235:genetics; D000076105:X-ray Repair Cross Complementing Protein 1; D055815:Young Adult
chemical_list: D004268:DNA-Binding Proteins; D000076105:X-ray Repair Cross Complementing Protein 1; C000619371:XRCC1 protein, human
keywords: DNA repair; breast cancer; case-control study; physical activity; single nucleotide polymorphisms