Study on the single nucleotide polymorphisms of TNF-α of gene in the promoter region in three main ethons population in Guizhou province

Objective:To study single nucleotide polymorphisms in the promoter region of TNF-α gene in Chinese Han,Miao and Buyi population in Guizhou province.Methods:The five polymorphism sites at-1031,-863,-857,-308,-238 in TNF-α gene promoter region were detected using PCR-RFLP and SSP-PCR.Results:The allele frequencies of TNF-α gene in promoter region in these three main ethons of population were observed.In Chinese Han population,the-238 G was 96% and-238 A was 4%.Inaddition,-308 G was 92% and-308 A was 8%,-857 C was 65% and-857 T was 35%,-863 C was 80% and-863 A was 20%,-1031 T was 48% and-1031 C was 52%;In Miao people,the frequency at the loci above were 15.0%,8.0%,26.0%,4.0% and 50.0%;And the frequency of these five loci above were 14.0%,6.0%,11.0%,16.0% and 50.0% in Buyi population.Conclusion:Single nucleotide polymorphisms of TNF-α gene exhibits some specific characters in Chinese Han and Miao and Buyi population in Guizhou province.