Vascular endothelial growth factor (VEGF) is a major angiogenic factor and a prime regulator of endothelial cell proliferation. VEGF gene is located on chromosome 6 (6p21.3). Objectives: To determine whether deletion at -2549 position of promoter region of the VEGF gene exert influence on the development of diabetic retinopathy. Methods: Diseased and control subjects were selected for blood sampling. The blood samples (n=50) was taken from diabetic retinopathy patients and blood samples(n=50) was taken from type 2 diabetes mellitus patients as control group. After DNA extraction Polymerase Chain Reaction was performed to amplify the VEGF gene and sequencing was commercially done for molecular analysis of VEGF gene. Results: The molecular analysis confirmed that deletion at -2549 position of the promoter region of VEGF significantly greater in DR group. 2-11 % deletion was examined at -2549 position of promoter region of VEGF. The DD genotype was responsible for the development of DR. Conclusions: This study indicates that DD gene mutation and D allele is an autonomous hazard aspect for the advancement and progression of retinopathy in people with type 2 diabetes, additionally different issues for example diabetic age and family ancestry of diabetes assumes key function in the advancement of retinopathy in diabetic patients.
Diabetic retinopathy is characterized as basement membrane (BM) thickening, pericyte loss, endothelial cell (EC) dysfunction, microaneurysms, microvascular infarcts and neovascularization in a patient with diabetic retinopathy. Objectives: To determine the VEGF genotype and allele frequency of diabetes mellitus and diabetic retinopathy in Lahore, Pakistan. Methods: A total of 100 blood samples were taken including diabetes mellitus (50) and diabetic retinopathy patients (50). Diseased and control subjects were selected for blood sampling. Demographic and clinical characteristics was evaluated. The BMI, HbA1c and the blood pressure of both groups were also examined. The VEGF genotype and allele frequency of diabetes mellitus and diabetic retinopathy was done. The statistical analysis was done by chi-square test and SPSS to study significant differences in control and diabetic retinopathy subjects. Results: The normal estimation of DM group was 46.18 ± 1.23 years while of DR class was 52.86 ± 1.36 years. The mean value of BMI of DM group was 26.0±0.62 while of DR group was 26.57±0.70. DD genetic mutation was substantially higher in diabetic retinopathy bunch (p<0.05) relative to the II gene mutation, the huge contrasts (p<0.05) were seen in diabetic group. Conclusions: This study concluded that Vascular endothelial growth factor gene was detected in both group of diabetes. In retinopathy people with T2DM the substantial elevated VEGF DD genetic variation was seen relative to retinopathy people without diabetes.
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