start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2013 dt-pub=20131201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effects of lifestyle and single nucleotide polymorphisms on breast cancer risk: a case-control study in Japanese women en-subtitle= kn-subtitle= en-abstract= kn-abstract=Background: Lifestyle factors, including food and nutrition, physical activity, body composition and reproductive factors, and single nucleotide polymorphisms (SNPs) are associated with breast cancer risk, but few studies of these factors have been performed in the Japanese population. Thus, the goals of this study were to validate the association between reported SNPs and breast cancer risk in the Japanese population and to evaluate the effects of SNP genotypes and lifestyle factors on breast cancer risk. Methods: A case-control study in 472 patients and 464 controls was conducted from December 2010 to November 2011. Lifestyle was examined using a self-administered questionnaire. We analyzed 16 breast cancer-associated SNPs based on previous GWAS or candidate-gene association studies. Age or multivariate-adjusted odds ratios (OR) and 95% confidence intervals (95% CI) were estimated from logistic regression analyses. Results: High BMI and current or former smoking were significantly associated with an increased breast cancer risk, while intake of meat, mushrooms, yellow and green vegetables, coffee, and green tea, current leisure-time exercise, and education were significantly associated with a decreased risk. Three SNPs were significantly associated with a breast cancer risk in multivariate analysis: rs2046210 (per allele OR = 1.37 [95% CI: 1.11-1.70]), rs3757318 (OR = 1.33[1.05-1.69]), and rs3803662 (OR = 1.28 [1.07-1.55]). In 2046210 risk allele carriers, leisure-time exercise was associated with a significantly decreased risk for breast cancer, whereas current smoking and high BMI were associated with a significantly decreased risk in non-risk allele carriers. Conclusion: In Japanese women, rs2046210 and 3757318 located near the ESR1 gene are associated with a risk of breast cancer, as in other Asian women. However, our findings suggest that exercise can decrease this risk in allele carriers. en-copyright= kn-copyright= en-aut-name=MizooTaeko en-aut-sei=Mizoo en-aut-mei=Taeko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TairaNaruto en-aut-sei=Taira en-aut-mei=Naruto kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NishiyamaKeiko en-aut-sei=Nishiyama en-aut-mei=Keiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NogamiTomohiro en-aut-sei=Nogami en-aut-mei=Tomohiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=IwamotoTakayuki en-aut-sei=Iwamoto en-aut-mei=Takayuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=MotokiTakayuki en-aut-sei=Motoki en-aut-mei=Takayuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=ShienTadahiko en-aut-sei=Shien en-aut-mei=Tadahiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=MatsuokaJunji en-aut-sei=Matsuoka en-aut-mei=Junji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=DoiharaHiroyoshi en-aut-sei=Doihara en-aut-mei=Hiroyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= en-aut-name=IshiharaSetsuko en-aut-sei=Ishihara en-aut-mei=Setsuko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=10 ORCID= en-aut-name=KawaiHiroshi en-aut-sei=Kawai en-aut-mei=Hiroshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=11 ORCID= en-aut-name=KawasakiKensuke en-aut-sei=Kawasaki en-aut-mei=Kensuke kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=12 ORCID= en-aut-name=IshibeYouichi en-aut-sei=Ishibe en-aut-mei=Youichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=13 ORCID= en-aut-name=OgasawaraYutaka en-aut-sei=Ogasawara en-aut-mei=Yutaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=14 ORCID= en-aut-name=KomoikeYoshifumi en-aut-sei=Komoike en-aut-mei=Yoshifumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=15 ORCID= en-aut-name=MiyoshiShinichiro en-aut-sei=Miyoshi en-aut-mei=Shinichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=16 ORCID= affil-num=1 en-affil= kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Thorac Surg & Breast & Endocrinol Surg affil-num=2 en-affil= kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Thorac Surg & Breast & Endocrinol Surg affil-num=3 en-affil= kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Thorac Surg & Breast & Endocrinol Surg affil-num=4 en-affil= kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Thorac Surg & Breast & Endocrinol Surg affil-num=5 en-affil= kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Thorac Surg & Breast & Endocrinol Surg affil-num=6 en-affil= kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Thorac Surg & Breast & Endocrinol Surg affil-num=7 en-affil= kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Thorac Surg & Breast & Endocrinol Surg affil-num=8 en-affil= kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Thorac Surg & Breast & Endocrinol Surg affil-num=9 en-affil= kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Thorac Surg & Breast & Endocrinol Surg affil-num=10 en-affil= kn-affil=Okayama Saiseikai Gen Hosp, Dept Radiol affil-num=11 en-affil= kn-affil=Okayama Rousai Hosp, Dept Breast Surg affil-num=12 en-affil= kn-affil=Kagawa Prefectural Canc Detect Ctr, Dept Breast Surg affil-num=13 en-affil= kn-affil=Mizushima Kyodo Hosp, Dept Breast Surg affil-num=14 en-affil= kn-affil=Dept Breast & Endocrinol Surg affil-num=15 en-affil= kn-affil=Kinki Univ Hosp, Fac Med affil-num=16 en-affil= kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Thorac Surg & Breast & Endocrinol Surg en-keyword=Japanese women kn-keyword=Japanese women en-keyword=Asian kn-keyword=Asian en-keyword=Breast cancer kn-keyword=Breast cancer en-keyword=Lifestyle kn-keyword=Lifestyle en-keyword=Leisure-time exercise kn-keyword=Leisure-time exercise en-keyword=Parity kn-keyword=Parity en-keyword=Single nucleotide polymorphisms kn-keyword=Single nucleotide polymorphisms en-keyword=rs2046210 kn-keyword=rs2046210 en-keyword=rs3757318 kn-keyword=rs3757318 en-keyword=ESR1 kn-keyword=ESR1 END