ABSTRACT
AIM:To investigate the distribution characteristics of interleukin-22(IL-22)gene rs2227485C/T and rs2227491A/G polymorphisms in Guangxi people and the distribution differences with other ethnic groups ,and to ex-plore the difference levels of common lipid indexes in different genotypes.METHODS:SNaPshot technique and DNA se-quencing were used in 280 Guangxi persons to examine IL-22 genotypes and to analyzed the distribution frequencies of allele and genotype in these sites.The distribution frequencies in different sexes ,and the differences between groups and diffe-rence levels of common lipid indexes in different genotypes were analyzed statistically.RESULTS:Three genotypes of CC ,CT and TT were found in rs2227485C/T with the frequency distribution of 17.1％,49.3％and 33.6％,respectively.No significant difference between different sexes of each genotype and allele frequency in the Guangxi population was observed(P>0.05).Compared with the distribution frequencies of genotype and allele in HapMap -TSI,HapMap-HCB,HapMap-JPT and HapMap-MEX,those in Guangxi population showed statistically significant differences(P<0.05).Three geno-types of AA,AG and GG were found in rs2227491A/G with the frequency distribution of 16.1％,52.8％and 31.1％,re-spectively.There was no significant difference between different sexes of each genotype and allele frequency in the Guangxi population(P>0.05).The significant differences of genotype frequencies among Guangxi population ,HapMap-TSI,Hap- Map-JPT and HapMap-MEX were detected(P <0.05 ).Compared with the other 4 populations ,allele frequencies in Guangxi population had significant difference(P <0.05).There were significant differences in the levels of HDL-C and LDL-C among the 3 genotypes of rs2227491A/G.The level of HDL-C had difference between AG/AA genotype and GG genotype.In addition,the level of LDL-C had difference between AG/GG genotype and AA genotype(P<0.05).CON-CLUSION:rs2227485C/T and rs2227491A/G polymorphisms of IL-22 gene have differences in different populations.The rs2227491A/G polymorphism may be associated with serum lipid levels.