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Platelet glycoprotein IIIa PlA1/A2 polymorphism and its relationship with diabetic nephropathy in type 2 diabetic patients.

OBJECTIVE
The increased prevalence of cardiovascular events in type 2-diabetic patients with micro- or macroalbuminuria is not completely explained by an excess of conventional risk factors for atherosclerosis. Genetic polymorphism within the platelet glycoprotein IIIa has been implicated in the etiology of acute coronary syndromes. We tested the hypothesis that the PI(A1/A2) polymorphism could in part account for the increased cardiovascular risk of type 2-diabetic patients with micro- or macroalbuminuria compared to normoalbuminuric diabetic patients.


RESEARCH DESIGN AND METHODS
We have examined the PI(A1/A2) polymorphism of the platelet glycoprotein IIIa in type 2-diabetic patients: 94 with micro-, macroalbuminuria, and 94 with normoalbuminuria, matched for age, sex and body mass index. PI(A) genotypes were performed by polymerase chain reaction and restriction enzyme digestion.


RESULTS
There was no significant difference in the prevalence of PI(A2)-positive genotypes (either PI(A1/A2) or PI(A2/A2)) in the two groups of patients (chi2 = 0.19, df = 1 , p = 0.66).


CONCLUSIONS
These results suggest that carriage of the platelet glycoprotein IIIa PI(A2) allele does not contribute to explain the increased cardiovascular risk associated with micro- or macroalbuminuria in type 2 diabetes.