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To evaluate the association of the V249I and T280M variants of CX3CR1 fractalkine gene with carotid intima-media thickness in Mexican subjects with and without type 2 diabetes. We analyzed the V249I and T280M variants of the CX3CR1 receptor by TaqMan assays in 111 subjects with type 2 diabetes and 109 healthy controls. Hemoglobin A1c, glucose, and lipid profile were determined. A significant increase in carotid intima-media thickness was observed in type 2 diabetes patients (0.979 ± 0.361 mm) compared to healthy controls (0.588 ± 0.175 mm). In subjects carrying the MM variant of the T280M polymorphism, hemoglobin A1c was higher (p = 0.008). Classic risk factors for atherosclerosis showed no differences between carriers of the T280M and V249I variants. Controls with the II249 genotype associated with carotid intima-media thickness (0.747 ± 0.192 mm; p = 0.041), and this difference remained significant even after adjusting factors such as age, gender, and body mass index (OR: 7.7; 95% CI: 1.269-47.31; p = 0.027). V249I genotype of the fractalkine receptor showed a protector role in patients with type 2 diabetes. The T280M genotype is associated with increased carotid intima-media thickness in Mexican individuals with or without type 2 diabetes.




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