title: Cytochrome P450 1A1, glutathione S-transferases M1 and T1 polymorphisms in Ovambos and Mongolians.
abstract: Cytochrome P450 (CYP) 1A1, glutathione S-transferase (GST) M1, and GSTT1 gene polymorphisms have been shown to be associated with several diseases. In this study, CYP1A1 MspI, GSTM1 and GSTT1 gene polymorphisms were investigated in 134 Ovambo and 207 Mongolians, and the results were compared with those from previous studies. Using polymerase chain reaction/restriction fragment length polymorphism (PCR-RFLP) the frequency of CYP1A1 MspI mutation was determined. The multiplex PCR was used to determine the GSTM1 and GSTT1 polymorphism. The frequencies of wild-type, heterozygous variant and homozygous variant of the CYP1A1 MspI genotypes were 72.4%, 25.4% and 2.2%, and 22.7%, 55.6% and 21.7% in the Ovambos and Mongolians, respectively. The frequencies of GSTM1 (null) and GSTT1 (null) genotypes were 11.2% and 35.8%, and 46.4% and 25.6% in the Ovambos and Mongolians, respectively. The CYP1A1 MspI and GSTT1 (null) genotype distribution of the Ovambos was similar to that of African-Americans and some Caucasians. In contrast, the GSTM1 (null) genotype distribution was different from that of all other populations. Among Mongolians, the CYP1A1 MspI polymorphism showed the highest mutation frequencies, GSTM1 (null) was similar to that of East Asians, and GSTT1 (null) was different from that of almost all the Asians examined.
authors.affiliation: Department of Legal Medicine, Shimane University Faculty of Medicine, 89-1 Enya, Izumo, Shimane, Japan.
authors.forename: Junko
authors.initials: J
authors.lastname: Fujihara
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Yasuda
authors.forename: Reiko
authors.initials: R
authors.lastname: Iida
authors.forename: Hisakazu
authors.initials: H
authors.lastname: Takatsuka
authors.forename: Yoshimi
authors.initials: Y
authors.lastname: Fujii
authors.forename: Haruo
authors.initials: H
authors.lastname: Takeshita
mesh_terms: D044466:Asian People / Q000235:genetics*; D019363:Cytochrome P-450 CYP1A1 / Q000235:genetics*; D005006:Ethnicity / Q000235:genetics*; D005787:Gene Frequency; D005828:Genetics, Population; D005838:Genotype; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D008986:Mongolia; D009276:Namibia; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic
chemical_list: D019363:Cytochrome P-450 CYP1A1; D005982:Glutathione Transferase; C413545:glutathione S-transferase T1