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Clin Hemorheol Microcirc. 2008;39(1-4):329-32.

Comparison of the plasminogen activator inhibitor-1 4G/5G gene polymorphism in females with venous thromboembolism during pregnancy or spontaneous abortion.


Genetic polymorphisms in plasminogen activator inhibitor-1 gene-675 4G/5G (PAI-1 4G/5G) are claimed to contribute to an increased risk of venous thromboembolism. Inherited thrombophilia, on the other hand, is associated with the occurrence of spontaneous abortions. The objective of this study was, to explore the significance of genetic polymorphisms of PAI-1 4G/5G with particular emphasis on 4G alleles in pregnant women suffering from venous thromboembolism or early spontaneous abortion, respectively. Therefore genetic PAI-1 4G/5G polymorphisms were studied in 108 pregnant females suffering from venous thromboembolism (n=69) or from spontaneous abortion (<20 week, n=39), respectively. Healthy volunteers (n=238) were taken as controls. The frequencies of 4G alleles (4G/4G or 4G/5G genotypes) of PAI-1 were significantly higher in venous thromboembolism (OR: 3.40, p=0.0088) and slightly higher, but not significantly, in abortions (RR: 2.33; p=0.1162) compared to controls. The incidence of 4G-carriers in females with abortion was 0.68 (-32%) compared to women suffering from venous thromboembolism alone. We conclude from these data, that the occurrence of PAI-1 4G/4G or 4G/5G genotypes, respectively, is clinically significant for the pathogenesis of venous thromboembolism in pregnancy but not for early abortion.

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