Thromb Haemost 1997; 78(03): 1008-1014
DOI: 10.1055/s-0038-1657678
Rapid Communication
Schattauer GmbH Stuttgart

Relationship of Anti β2-giycoprotein I and Anti Prothrombin Antibodies to Thrombosis and Pregnancy Loss in Patients with Antiphospholipid Antibodies

Ricardo R Forastiero
The University Institute of Biomedical Sciences and Institute of Cardiology and Cardiovascular Surgery, Favaloro Foundation, Buenos Aires, Argentina
,
Marta E Martinuzzo
The University Institute of Biomedical Sciences and Institute of Cardiology and Cardiovascular Surgery, Favaloro Foundation, Buenos Aires, Argentina
,
Graciela S Cerrato
The University Institute of Biomedical Sciences and Institute of Cardiology and Cardiovascular Surgery, Favaloro Foundation, Buenos Aires, Argentina
,
Lucía C Kordich
1   The Department of Biological Chemistry, School of Exact and Natural Sciences, University of Buenos Aires, Buenos Aires, Argentina
,
Luis O Carreras
The University Institute of Biomedical Sciences and Institute of Cardiology and Cardiovascular Surgery, Favaloro Foundation, Buenos Aires, Argentina
› Author Affiliations
Further Information

Publication History

Received 15 1996

Accepted after resubmission 23 April 1997

Publication Date:
12 July 2018 (online)

Summary

The lupus anticoagulant (LA) and anticardiolipin antibodies (aCL) are clinically relevant because of their association with thrombosis and pregnancy loss. The group of antiphospholipid antibodies (aPL) includes antibodies primarily directed against various phospholipid-binding proteins, mainly β2-glycoprotein I (β2GPI) and prothrombin. Some studies suggest that there is an association between the presence of anti β2GPI antibodies (a(β2GPI) of IgG isotype and thrombosis. Therefore, aPL defined according to the plasma protein to which they are directed appear to be more appropriate for the evaluation of their clinical importance. Using home-made ELISAs we evaluated the presence of a(β2GPI and antiprothrombin antibodies (anti-II) of both isotypes (IgG and IgM) in a group of 233 patients with LA and/or aCL. Forty-four women had a history of pregnancy loss, 45 patients had a history of venous thrombosis (VT) and 32 of arterial thrombosis (AT). Patients from the autoimmune group (systemic lupus erythematosus and antiphospholipid syndrome) had a higher prevalence of aβ2GPI and/or anti-II than those from the miscellaneous group. In the univariate analysis, a significant association was shown between the presence of aβ2GPI-IgG (OR 3.2; 95% Cl 1.5-6.6) and previous VT, but not AT. Anti-II were related to VT but the multivariate analysis showed that aβ2GPI-IgG are the only independent risk factor for VT (OR 3.0; 95% Cl 1.3-6.2). The presence of aβ2GPI-IgM correlates well with a history of pregnancy loss (OR 2.6; 95% Cl 1.1-6.1). The coagulation tests profile showed that the clotting assays were more prolonged in patients having aCL, a(β2GPI or anti-II. But a higher prevalence of abnormal results was only found for the dilute Russell viper venom time in patients with VT, as compared to those without thrombosis (94.4% vs. 58.7%, p <0.02). The measurement of aβ2GPI of both isotypes could help to identify aPL-positive patients with a higher risk for thrombosis and pregnancy loss, although this association should be confirmed by prospective studies.

 
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