Abstract
Oxidative stress has been hypothesized to play a crucial role in the complications of type 2 diabetes (T2D). Hyperglycaemia-mediated increases in free radicals have a deleterious effect on cellular compartments and nucleic acids, leading to imbalances between free radicals and antioxidant enzymes. This case–control study comprised two groups with 100 participants (50 T2D and 50 DN patients) and aimed to examine the association between single-nucleotide polymorphisms (SNPs) in the genes encoding nicotinamide adenine dinucleotide phosphate oxidase (NOX), glutathione S-transferase P (GSTP1), and glutathione peroxidase 1(GPX1) and diabetic nephropathy (DN) risk in patients with T2D. An SNP genotyping assay was performed using TaqMan assay and real-time PCR to identify the SNPs (NOX rs4673, GSTP rs1695, GPX1 rs1050450). The Sanger method was used to validate our findings. Fisher chi-square analyses revealed no significant differences in these genes when comparing T2D patients with and without DN. Our findings suggest no association between the rs4673, rs1695, and rs1050450 SNPs and DN in Saudi patients with T2D.
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