Premium
Prevalence of homozygosity for the deleted alleles of glutathione S‐transferase mu (GSTMl) and theta (GSTTl) among distinct ethnic groutx from Brazil: relevance to enviromental carcinogenesis?
Author(s) -
Anuda Valder R.,
Grignolli Carlos E.,
Gonqalves Marilda S.,
Soares Manoel C.,
Menezes Raimundo,
Saad Sara TO,
Costa Fernando F.
Publication year - 1998
Publication title -
clinical genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.543
H-Index - 102
eISSN - 1399-0004
pISSN - 0009-9163
DOI - 10.1111/j.1399-0004.1998.tb04286.x
Subject(s) - genotype , allele , genetics , glutathione s transferase , allele frequency , null allele , biology , carcinogenesis , glutathione , genotype frequency , genetic predisposition , ethnic group , gene , biochemistry , enzyme , sociology , anthropology
Arruda VR, Grignolli CE, Goncalves MS, Soares MC, Menezes R, Saad STO, Costa FF. Prevalence of homozygosity for the deleted alleles of glutathione S‐transferase mu (GSTMl) and theta (GSTTl) among distinct ethnic groups from Brazil: relevance to enviromental carcinogenesis? Clin Genet 1998: 54: 210–214. 0 Munksgaard, 1998 Environmental related diseases due to occupational carcinogens and toxic substances are a serious problem particularly in developing countries. The glutathione S‐transferase system is fundamental for the detoxification of numerous carcinogens and mutagens. The individual inherited susceptibility to chemical carcinogenesis due to glutathione S‐transferase mu (GSTMl) and theta (GSTTl) varies significantly among distinct ethnic groups. In this study we determined the prevalence of the null genotype of the GSTMl and GSTTl genes among individuals from three distinct Brazilian racial groups using a multi‐plex‐PCR methodology. The results showed that the highest prevalence of the null genotype for the GSTMl occurred among Caucasians (55%, allele frequency = 0.74), followed by 33% among Brazilian Black subjects (allele frequency = 0.57). and 20% among Amazonian Indians (allele frequency = 0.45). For GSTTl a homogenous distribution of the null genotype was found among Caucasian and African descendants (18.5 and 19% homozygotes, respectively, allele. frequency = 0.43). with a lower prevalence among Amazonian Indians (11% of homozygotes, a!lele frequency = 0.34). Whether the deficiency of the GST system contributes to a predisposition to environmental related carcinogenesis in specific popuiations in Brazil remains to be determined.