PMID: 8595125Nov 1, 1995Paper

Anticardiolipin antibodies in patients with pregnancy loss induce factor Xa production in the presence of beta 2-glycoprotein I

American Journal of Reproductive Immunology : AJRI
M S OgasawaraY Yagami

Abstract

Anticardiolipin antibodies (aCL) are commonly associated with recurrent pregnancy loss, though the mechanism is uncertain. Some investigators have indicated that aCL may be directed at a complex made up of cardiolipin and a blood anticoagulant, beta 2-glycoprotein I (beta 2GPI). We therefore investigated the effects of beta 2GPI-dependent aCL IgG enriched fractions, isolated from sera of patients with pregnancy losses, on blood coagulation. beta 2GPI-dependent aCL were prepared from sera of three women with second trimester pregnancy losses, by cardiolipin affinity column chromography, following by anti-beta 2GPI affinity column chromatography. The effects of beta 2GPI and beta 2GPI-dependent aCL on the activation of factor X in vitro were examined. beta 2GPI inhibited the activation of factor X and beta 2GPI-dependent aCL blocked this inhibitory effect in a dose dependent manner. These results imply the possibility of beta 2GPI-dependent aCL induce hypercoagulation or thrombus by blocking the inhibitory effect of beta 2GPI on activation of factor X, which may result in pregnancy loss.

References

Dec 15, 1992·Thrombosis Research·D R Wagenknecht, J A McIntyre
Jun 1, 1990·Proceedings of the National Academy of Sciences of the United States of America·H P McNeilS A Krilis
Jul 1, 1988·American Journal of Obstetrics and Gynecology·N Gleicher, A el-Roeiy
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Jan 1, 1984·The International Journal of Biochemistry·H Wurm
Mar 1, 1993·American Journal of Reproductive Immunology : AJRI·K AokiY Yagami

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