Background: Plasminogen activator inhibitor-1 (PAI-1) plays an important role in the regulation of fibrinolysis and extracellular matrix turnover. PAI-1 4G/5G insertion/deletion polymorphism in the PAI-1 promoter region has been shown to modulate PAI-1 plasma levels. We investigated the relationship between this polymorphism and the prevalence of diabetic nephropathy and retinopathy in patients with type 2 diabetes in the Austrian population.
Patients And Methods: 147 consecutive patients with type 2 diabetes mellitus (96 men, 51 women; median age, 65 years; IQR, 59-71) were analyzed for the PAI-1 4G/5G genotype.
Results: The genotype distribution in the individuals tested was as follows: 17% (n = 25) 5G/5G, 54% (n = 80) 4G/5G, and 29% (n = 42) 4G/4G. Patients homozygous for allele 4G had a significantly higher risk of diabetic proliferative retinopathy than patients without signs of diabetic retinopathy or nonproliferative retinopathy (OR, 7.3; 95% CI, 1.4-38.8; P = 0.02). No significant associations were observed between the PAI-1 genotype and the presence of albuminuria.
Conclusion: According to our results, diabetic proliferative retinopathy might be associated with the prevalence of PAI-1 genotype 4G/4G.
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