Genotyping by"cold single-strand conformation polymorphism" of the UGT1A1 promoter polymorphism in Mexican mestizos.
Since no data have previously been reported concerning both the (TA) n polymorphism at the promoter of the UGT1A1 gene in the Mexican population and the use of single-strand conformation polymorphism (SSCP) for the detection of such polymorphism, genotyping by SSCP in 375 G-6-PD normal (Group A) and 81 G-6-PD-deficient (Group B) mestizos belonging to 14 states was carried out. Allele frequencies for (TA)6 and (TA)7 repeats were 0.654 and 0.334, respectively, in Group A and 0.685 and 0.315 in Group B; in the former group, the (TA)5 allele was also observed with a frequency of 0.012. The frequencies of the genotype (TA)7/(TA)7 were 10.1% (Group A) and 8.6% (Group B). The (TA)7/(TA)8 genotype was also observed in a patient with unconjugated hyperbilirubinemia. Due to the importance of its potential medical implications, the observed high frequency (10%) of the (TA)7/(TA)7 genotype is stressed. Genotyping by SSCP of the (TA) n polymorphism is an adequate methodological option.
Arámbula
Eliakym
E
División de Genética, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Jalisco, Mexico.
Vaca
Gerardo
G
D016022:Case-Control Studies; D005787:Gene Frequency; D005820:Genetic Testing; D005838:Genotype; D014453:Glucuronosyltransferase / Q000235:genetics*; D005953:Glycogen Storage Disease Type I / Q000235:genetics; D006801:Humans; D006933:Hyperbilirubinemia, Hereditary / Q000235:genetics; D008297:Male; D008722:Methods; D008800:Mexico / Q000453:epidemiology / Q000208:ethnology; D011110:Polymorphism, Genetic; D018807:Polymorphism, Single-Stranded Conformational; D011401:Promoter Regions, Genetic / Q000235:genetics*; D000099148:UGT1A1 Enzyme
D014453:Glucuronosyltransferase; D000099148:UGT1A1 Enzyme