Association between genotyping of transforming growth factor Beta 1 with oxidative status in type 2 diabetic nephropathy Complications

Objectives: To assess the association between Transforming Growth Factor β1 gene polymorphism (T869C) and type 2 diabetes mellitus with and without nephropathy complications with endogenous antioxidant reduced glutathione levels in type 2 diabetic patients with/without nephropathy complications of Kerbala province: Iraq. Methods: A case-control study was performed at which 100 patients with diabetic nephropathy, 100 patients with only type 2 diabetic and another 100 apparently healthy individuals as control were recruited. Fasting blood glucose, HbA1c%, urea, creatinine and glutathione were measured by spectrophotometric methods using enzymatic procedures. Transforming growth factor β1 gene was genotyped for the T>C (T869C) SNP by PCR-ARMS technique. Results: The genotype and allele frequencies of TGFβ1 gene polymorphism in type 2 diabetes mellitus, type 2 diabetic nephropathy, and control were examined. The transforming growth factor β1 (T869C) C allele, TC and TC + CC genotypes were significantly higher in patients; the T allele and TT genotype were significantly higher in controls (P ≤ 0.001). Glutathione give also a significant result in diabetic patients with and without nephropathy in when compared with controls. Conclusion: The observed data indicated that TGFβ1 (T869C) codon 10, allele C, and C allele-containing genotypes may be susceptible, and the T allele / TT genotype may be protective factors for type 2diabetic nephropathy complications. The results of glutathione showed that it may be one of the causes of presence high oxidants compounds, which is lead to the damage and destruction of mutations in the DNA of the cell.