Abstract:
:The aim of this study was to determine if the measurement of anti-beta2-glycoprotein I antibodies (abeta2-GPI) in serum levels contributes to the better characterization of the clinical situation of patients with antiphospholipid syndrome (APS). For this purpose abeta2-GPI of both isotypes was measured in 42 patients with APS and 32 SLE patients without APS. Clinical records of all patients were thoroughly reviewed. The presence of abeta2-GPI was correlated with the clinical manifestations of APS and compared with the presence of anticardiolipin antibodies (aCL) and lupus anticoagulant (LA) activity. There was a positive correlation between levels of aCL and abeta2-GPI for both IgG and IgM isotypes (rho of Spearman=0.82 and 0. 64 respectively, P=0.0001). Both antibodies presented significantly higher titres in LA positive patients (P<0.05). The specificity for APS was 91% for IgG abeta2-GPI vs 75% for IgG aCL and 87% for IgM abeta2-GPI vs 81% for IgM aCL. 68% of patients with thrombosis of 100% of patients with thrombocytopenia showed positive tests for all three markers (aCL, LA, abeta2-GPI). Simultaneous presence of circulating LA and high titres of both aCL and abeta2-GPI identify a subset of patients with primary APS (PAPS) who have a more severe clinical course of the disease. Although the specificity of abeta2-GPI IgG is higher than that of aCL IgG, when all three tests are performed abeta2-GPI testing provides only additional information to that of aCL and LA. Therefore, we concluded that the abeta2-GPI test should not be considered as a substitute for conventional LA or aCL assays. However, performance of abeta2-GPI seems to be important in PAPS with high aCL titres, to alert the physician about the risk for the worst course of the illness.
journal_name
Lupusjournal_title
Lupusauthors
Detkov,Gil-Aguado A,Lavilla P,Cuesta MV,Fontán G,Pascual-Salcedo Ddoi
10.1177/096120339900800604subject
Has Abstractpub_date
1999-01-01 00:00:00pages
430-8issue
6eissn
0961-2033issn
1477-0962journal_volume
8pub_type
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