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Thromb Haemost 1996; 75(05): 717-720
DOI: 10.1055/s-0038-1650354
Original Article
Schattauer GmbH Stuttgart

Reactivity to β2 Glycoprotein I Clearly Differentiates Anticardiolipin Antibodies from Antiphospholipid Syndrome and Syphilis

R R Forastiero
1   The University Institute of Biomedical Sciences and Institute of Cardiology and Cardiovascular Surgery, Favaloro Foundation, University of Buenos Aires, Buenos Aires, Argentina
,
M E Martinuzzo
1   The University Institute of Biomedical Sciences and Institute of Cardiology and Cardiovascular Surgery, Favaloro Foundation, University of Buenos Aires, Buenos Aires, Argentina
,
L C Kordich
2   The Department of Biological Chemistry, School of Exact and Natural Sciences, University of Buenos Aires, Buenos Aires, Argentina
,
L O Carreras
1   The University Institute of Biomedical Sciences and Institute of Cardiology and Cardiovascular Surgery, Favaloro Foundation, University of Buenos Aires, Buenos Aires, Argentina
› Institutsangaben
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Publikationsverlauf

Received 12. September 1995

Accepted after resubmission 24. Januar 1996

Publikationsdatum:
10. Juli 2018 (online)

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Summary

Anticardiolipin antibodies (aCL) detected by standard ELISA are found in association with autoimmune and infectious diseases. It is now recognized that P2 glycoprotein I (β2GPI) is a cofactor for aCL binding to cardiolipin (CL). To examine differences in cofactor requirements, aCL positive sera from patients with the antiphospholipid syndrome (APS) and syphilis were studied. Using an ELISA with human purified P2GPI adsorbed onto irradiated plates, we detected high binding activity in 29 out of 35 samples from APS patients and low in only 1 out of 37 aCL positive syphilis sera. Moreover, a good correlation (r = 0.79) was also observed in the former group between aCL and anti β2GPI. Whole IgG and affinity purified IgG aCL from APS patients did not bind to CL in the absence of β2GPI, but recognized β2GPI on irradiated plates in the absence of phospholipids. In contrast, IgG purified from syphilis patients only bound to CL alone. Taken together, these data indicate that performing both ELISA (aCL and anti β2GPI) it could be possible to distinguish aCL from autoimmune or infectious diseases.

 

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