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Title: Anticardiolipin, anti-beta(2)-glycoprotein I, antiprothrombin antibodies, and lupus anticoagulant in patients with systemic lupus erythematosus with a history of thrombosis.
Author: Swadzba J, De Clerck LS, Stevens WJ, Bridts CH, van Cotthem KA, Musial J, Jankowski M, Szczeklik A.
Journal: J Rheumatol; 1997 Sep; 24(9):1710-5. PubMed ID: 9292792.
Abstract:
OBJECTIVE: To determine the clinical importance of anticardiolipin (aCL), anti-beta(2)-glycoprotein I (a beta(2)-GPI), antiprothrombin (aPT), and lupus anticoagulant (LAC) antibodies in patients with systemic lupus erythematosis (SLE) with and without a history of thrombosis. METHODS: We studied 100 patients with SLE (32 with a history of thrombosis), 27 patients with a lupus-like disease (9 with a history of thrombosis), and 41 healthy volunteers, IgG and IgM aCL, antibodies to the protein cofactors (a beta(2)-GPI and aPT) were determined by ELISA. Eighty-six of 127 patients were also tested for LAC. RESULTS: IgG aCL and LAC were associated with thrombosis but sensitivity (63 and 61%) and specificity (66 and 66%, respectively) of these tests were low. IgG and IgM a beta(2)-GPI were, respectively, 85 and 86% specific for a thrombotic history, but sensitivity was very low (32 and 29%). High IgG aCL were associated with the presence of a beta(2)-GPI and were 85% specific for thrombosis. There was no significant association between IgG or IgM aPT and thrombosis. CONCLUSION: Only high levels of IgG aCL and presence of LAC and/or a beta(2)-GPI are relevant in defining a thrombotic subset of patients with SLE. Longitudinal prospective studies are needed to investigate the predictive value of the different antiphospholipid and protein cofactor antibodies.

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