[Frequencies of GSTM1, GSTT1, and GSTP1 polymorphisms in ethnic minority from Guizhou].

OBJECTIVE:To investigate the frequencies of GSTM1, GSTT1 and GSTP1 polymorphisms in Dong, Yi and Yao ethnic groups from Guizhou. METHODS:In 321 volunteers who were population-based, GSTM1 and GSTT1 polymorphisms were analyzed by a multiplex-PCR procedure, whereas GSTP1 polymorphism was analyzed by PCR-RFLP method. RESULTS:Null genotype for GSTM1 and GSTT1 was 59.6%-71.2% and 39.4%-72.5%, respectively. The genotypic distribution of GSTP1 was 63.3%-75% for AA, 23.2%-35.8% for AG, 0-1.9% for GG, whereas the allelic frequencies were 81.2%-86.6% for the A allele, and 13.4%-18.8% for the G allele. CONCLUSION:There is a significant relationship between GSTT1 frequencies and ethnic populations.