title: Distribution of composite CYP1A1 genotypes in Africans, African-Americans and Caucasians.
abstract: We present the genotype distribution of the CYP1A1 gene in a sample of over 300 subjects of various ethnic origins. Genotypes are presented as composites of eight possible alleles, taking into account the three major polymorphisms, including a recently described African-American-specific MspI RFLP. A new nomenclature system is presented for clarifying the various haplotypes. Interesting interracial differences in allelic frequencies and admixture rates were observed for the three polymorphisms. Because of the importance of the CYP1A1 gene (which encodes the aromatic hydrocarbon hydroxylase) as a biomarker of genetic susceptibility to environmental carcinogens such as polycyclic aromatic hydrocarbons, these data may provide a useful reference for future studies of relationships between CYP1A1 genotype and disease susceptibility.
authors.affiliation: Nelson Institute of Environmental Medicine, New York University Medical Center, New York, N.Y. 10016, USA.
authors.forename: S J
authors.initials: SJ
authors.lastname: Garte
authors.forename: J
authors.initials: J
authors.lastname: Trachman
authors.forename: F
authors.initials: F
authors.lastname: Crofts
authors.forename: P
authors.initials: P
authors.lastname: Toniolo
authors.forename: J
authors.initials: J
authors.lastname: Buxbaum
authors.forename: S
authors.initials: S
authors.lastname: Bayo
authors.forename: E
authors.initials: E
authors.lastname: Taioli
mesh_terms: D000354:Africa, Western; D000483:Alleles; D000755:Anemia, Sickle Cell / Q000235:genetics*; D044383:Black People / Q000235:genetics*; D019363:Cytochrome P-450 CYP1A1 / Q000235:genetics*; D005787:Gene Frequency; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D011110:Polymorphism, Genetic; D014481:United States; D044465:White People / Q000235:genetics*; D001741:Black or African American
chemical_list: D019363:Cytochrome P-450 CYP1A1