The relationship between glucokinase gene 4 tag single nucleotide polymorphism sites and type 2 diabetes mellitus / 国际检验医学杂志

ABSTRACT

Objective To investigate the relationships between Glucokinase(GCK) gene 4 tag single‐nucleotide polymorphisms , tagSNPs)sites which named rs12702070 ,rs2268569 ,rs2268573 and rs1476891 polymorphisms and type 2 diabetes in Chinese South‐ern Han Population .Methods This study was designed as a case‐control .499 type 2 diabetes patients and 499 healthy controls were chosen .4 GCK tagSNPs sites were analyzed by improved multiple ligase detection reaction(iMLDR) ,and genotype and allele fre‐quency between T2D group and healthy controls could be determined by chi‐square test ,logistic regression analysis ,and tagSNPs were further analyzed under three genetic modes(dominant ,recessive and additive) .What′s more ,Haploview software was used to construct the haplotype of 4 GCK tagSNPs and the linkage disequilibrium(LD) and relationship between various GCK haplotype and T2D susceptibility could be analyzed .Results Genotype distribution of rs2268573 ,rs2268569 and rs1476891 and allele frequen‐cy in T2D group were no significant differences with health controls .Significant differences in genotype distribution of rs12702070 and allele frequency were observed between T2D group and health controls .Under dominant model and additive model ,genotype distribution of rs12702070 in T2D was significantly different from health controls .One LD domain was observed in 3 tagSNPs a‐mong those 4 sites of GCK gene .There are 4 main haplotypes(TAG ,TGG ,TAT ,CGG)in rs2268569 ,rs12702070 and rs1476891 , but all these haplotypes have no relevance to the individual risk of T2D(P>0 .05) .Conclusion The results indicated that the GCK gene tagSNPs site rs12702070 imparts susceptibility to T2D in Han Chinese ,but not rs2268573 ,rs2268569 and rs1476891 .Four main haplotypes in rs2268569 ,rs12702070 and rs1476891 have no relevance to T2D .