Abstract
The -5 C/T polymorphism of platelet glycoprotein (GP) Ib alpha is a major determinant of the level of GP Ib/V/IX complex surface expression. We investigated the frequency of this polymorphism among Asian populations. The gene frequencies of cytosine (C) in this polymorphism were 0.283 and 0.219 in Japanese and Korean populations respectively. The C allele is linked with human platelet antigen (HPA)-2a and smaller types of variable number of tandem repeats (VNTR). A novel allele, C-HPA-2a-D of VNTR, was found. No association was observed between these alleles and coronary artery disease in this case-control study. The clinical relevance of this polymorphism in the thrombotic status remains undetermined.
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