title: Gene polymorphism of transforming growth factor-β1 in Egyptian patients with type 2 diabetes and diabetic nephropathy.
abstract: Role of the transforming growth factor-β1 (TGF-β1) gene polymorphisms located at codons 10 and 25 in the genetic predisposition to type 2 diabetes (T2D) and in diabetic nephropathy (DN) in Egyptian patients was investigated. A case control study was done for 99 unrelated Egyptian patients with T2D (50 DN(-) and 49 DN(+)) and 98 age- and sex-matched healthy controls. TGF-β1 T869C (codon 10) and G915C (codon 25) polymorphism detection was done by amplification refractory mutation system method. DN(+) patients were younger, with higher body mass index, serum triglycerides, serum creatinine, and lower serum albumin than those in DN(-) patients. Moderate and bad grades of diabetic control were associated with DN (P < 0.001). The TGF-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 (Pc < 0.001). The TGF-β1 TC genotype was associated with DN (Pc < 0.05). Non-significant differences were detected between T2D patients and controls in the frequencies of TGF-β1 (G915C) alleles and genotypes. In conclusion, these preliminary data showed that the TGF-β1 codon 10 C allele, and C allele-containing genotypes may be susceptible, and T allele/TT genotype may be protective factors for T2D and DN(+) complications.
authors: Molecular Immunology, Molecular Biology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), Menofia University, Menofia 22857, Egypt.
authors: Sherif M
authors: SM
authors: El-Sherbini
authors: Samar M
authors: SM
authors: Shahen
authors: Youssef M
authors: YM
authors: Mosaad
authors: Mohamed S
authors: MS
authors: Abdelgawad
authors: Roba M
authors: RM
authors: Talaat
mesh_terms: D000328:Adult; D000483:Alleles; D003062:Codon / Q000235:genetics; D003924:Diabetes Mellitus, Type 2 / Q000235:genetics*; D003928:Diabetic Nephropathies / Q000235:genetics*; D004534:Egypt; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000235:genetics; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D053773:Transforming Growth Factor beta1 / Q000235:genetics*
chemical_list: D003062:Codon; D053773:Transforming Growth Factor beta1