title: CYP1B1 and CYP19 gene polymorphisms and breast cancer incidence: no association in the ARIC study.
abstract: We conducted a nested case control study of 178 incident breast cancer cases and 356 controls in the Atherosclerosis Risk in Communities study. We evaluated the association between breast cancer and Val432Leu polymorphism in the CYP1B1 gene and the tetranucleotide repeats in intron 4 of the CYP19 gene. After adjustment for height, age at menopause, age at menarche, BMI, HRT, and alcohol intake, carriers of the Val/Leu or Val/Val genotype had a 1.45 fold (95% CI 0.85-2.47) greater odds of breast cancer than Leu/Leu carriers. There was no association of the breast cancer with any individual CYP19 allele. Compared to individuals homozygous with the 167 allele, odds ratios were close to 1.0 for the 167 heterozygous genotype and for the remaining tetranucleotide repeats combined. Our data shows no association between breast cancer and the Leu432Val polymorphism of the CYP1B1 gene or the tetranucleotide repeats of the CYP19 gene.
authors.affiliation: School of Public Health, Division of Epidemiology, University of Minnesota, Minneapolis, MN 55454, USA.
authors.forename: Bharat
authors.initials: B
authors.lastname: Thyagarajan
authors.forename: Marcia
authors.initials: M
authors.lastname: Brott
authors.forename: Pamela
authors.initials: P
authors.lastname: Mink
authors.forename: Aaron R
authors.initials: AR
authors.lastname: Folsom
authors.forename: Kristin E
authors.initials: KE
authors.lastname: Anderson
authors.forename: William Starr
authors.initials: WS
authors.lastname: Oetting
authors.forename: Myron
authors.initials: M
authors.lastname: Gross
mesh_terms: D001141:Aromatase / Q000235:genetics*; D001189:Aryl Hydrocarbon Hydroxylases / Q000235:genetics*; D001943:Breast Neoplasms / Q000201:enzymology / Q000453:epidemiology / Q000235:genetics*; D016022:Case-Control Studies; D015331:Cohort Studies; D065633:Cytochrome P-450 CYP1B1; D017931:DNA Primers / Q000737:chemistry; D004273:DNA, Neoplasm / Q000235:genetics; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D015994:Incidence; D007438:Introns; D008137:Longitudinal Studies; D008297:Male; D018895:Microsatellite Repeats / Q000235:genetics*; D008875:Middle Aged; D016017:Odds Ratio; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D011446:Prospective Studies
chemical_list: D017931:DNA Primers; D004273:DNA, Neoplasm; D001141:Aromatase; D001189:Aryl Hydrocarbon Hydroxylases; C585496:CYP1B1 protein, human; D065633:Cytochrome P-450 CYP1B1