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Objective To identify the potential association of transcription factor 7-like 2(TCF7L2 polymorphisms with type 2 diabetes mellitus in Uygur population of Xinjiang region .Methods In this case-control study ,819 ca-ses of type 2 diabetes mellitus patients were recruited in case group and 731 healthy individuals were selected as control.5 mL of blood sample were collected from each subject .The polymorphism was examined by matrix-assis-ted laser desorption/ionization-time of flight ( MALDI-TOF) and the OR value (95%CI) was evaluated by Logistic Regression Method to analyze the relationship between susceptibility to type 2 diabetes mellitus and different geno-types.Results In case group, the frequencies of TC, CC genotype and C allele at rs7901695 were higher than the corresponding frequencies in control group (P<0.05).The interaction between TCF7L2 and environment risk factors did not contribute to the occurrence of the type 2 diabetes mellitus .Conclusions The polymorphisms of rs7091695 in TCF7L2 but not rs7085532 in TCG7L2 may be associated with type 2 diabetes mellitus in Uygur pop-ulation in Xinjiang region .
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To explore the association between polymorphisms of transcription factor 7-like 2 gene (TCF7L2) and type 2 diabetes mellitus in Hefei district. The results suggest that the genetic variation DG10S478 in the TCF7L2 gene was not associated with type 2 diabetes mellitus in Hefei district ( P>0.05 ). However, its attribution to the susceptibility of type 2 diabetes mellitus in Hefei is not important.
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Objective To study the association of transcription factor 7-like 2(TCF7L2)polymorphisms with tvpe 2 diabetes mellitus in Chinese Han population. Methods Two polymorphisms (rs7903146 and rs12255372)of TCF7L2 gene were genotyped in 446 patients with type 2 diabetes mellitus(T2DM group)and 303 normal subiects (NC group) by PCR-restriction fragment length polymorphism(PCR-RFLP).Waist circumference.body mass index,plasma glucose,serum insulin,lipid profiles,high-sensitivity C-reactive protein and non-esterified fatty acid were measured.Homeostasis model assessment of insulin resistance(HOMA-IR)and β-cell function(HOMA-β)were calculated.Results (1) In T2DM group,T allele frequency and CT,TY geno tvpe frequeneies of rs7903146 were significantly higher than those in NC group(0.093,0.150,0.018 vs 0.043, 0.079,0.003,respectively,a11 P<O.O 1).Logistic regression analysis showed that the CT/TT genotype was a risk factor of tvpe 2 diabetes(OR=2.25,95%CI 1.39-3.62,P=0.001)and was associated with the decrease of insulin secretion. (2) No significant association was observed in vs12255372 alleles and genotypes with type 2 diabetes mellitus.Conclusion These results indicate that TCF7L2 might be one of the candidate genes for confe ring susceptibi lity to type 2 diabetes mellitus in the Chinese Han population.