OBJECTIVE: To investigate breast cancer risk according to metabolizing genes polymorphisms in older women. METHODS: A subset (43.8%) of 4248 older, white women from the Study of Osteoporotic Fractures (SOF) were genotyped for the catechol-O-methyltransferase (COMT) Val108Met polymorphism and the CYP1A1*2C locus. Cox proportional hazards models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for the associations between genotypes and breast cancer while controlling for potential confounders. RESULTS: During a mean follow up of 12.4 years, 252 women (5.9%) developed breast cancer. The HR (95% CI) for breast cancer was 1.24 (0.87-1.75) for COMT(Val/Met) and 1.35 (0.93-1.97) for COMT(Met/Met). No interactions with lifestyle and reproductive factors were found. The HR associated with the CYP1A1*2C Val allele was 0.80 (0.46, 1.39) with little evidence for interactions with lifestyle or reproductive factors. CONCLUSIONS: Among older white women, neither the COMT Val108/158Met polymorphism nor the CYP1A*2C Val allele plays a major role in breast cancer risk either alone or in combination with lifestyle and reproductive factors.
OBJECTIVE: To investigate breast cancer risk according to metabolizing genes polymorphisms in older women. METHODS: A subset (43.8%) of 4248 older, white women from the Study of Osteoporotic Fractures (SOF) were genotyped for the catechol-O-methyltransferase (COMT) Val108Met polymorphism and the CYP1A1*2C locus. Cox proportional hazards models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for the associations between genotypes and breast cancer while controlling for potential confounders. RESULTS: During a mean follow up of 12.4 years, 252 women (5.9%) developed breast cancer. The HR (95% CI) for breast cancer was 1.24 (0.87-1.75) for COMT(Val/Met) and 1.35 (0.93-1.97) for COMT(Met/Met). No interactions with lifestyle and reproductive factors were found. The HR associated with the CYP1A1*2C Val allele was 0.80 (0.46, 1.39) with little evidence for interactions with lifestyle or reproductive factors. CONCLUSIONS: Among older white women, neither the COMT Val108/158Met polymorphism nor the CYP1A*2C Val allele plays a major role in breast cancer risk either alone or in combination with lifestyle and reproductive factors.
Authors: Lori C Sakoda; Christie R Blackston; Jennifer A Doherty; Roberta M Ray; Ming Gang Lin; Dao Li Gao; Helge Stalsberg; Ziding Feng; David B Thomas; Chu Chen Journal: Cancer Epidemiol Date: 2010-09-17 Impact factor: 2.984
Authors: Katie A Ashton; Cliff J Meldrum; Mary L McPhillips; Janina Suchy; Grzegorz Kurzawski; Jan Lubinski; Rodney J Scott Journal: Hered Cancer Clin Pract Date: 2006-05-15 Impact factor: 2.857
Authors: Britton Trabert; Kathleen E Malone; Janet R Daling; David R Doody; Leslie Bernstein; Giske Ursin; Polly A Marchbanks; Brian L Strom; Mariela C Humphrey; Elaine A Ostrander Journal: Breast Cancer Res Date: 2007 Impact factor: 6.466