The prevalence and biologic significance of lupus anticoagulant and anticardiolipin antibodies in a general obstetric population
Abstract
Circulating antibodies to negatively-charged phospholipids have been implicated in the genesis of adverse pregnancy outcomes. However, it has yet to be established that these antibodies are causative or that they are invariably associated with untoward perinatal outcomes. To address this issue, the prevalence of lupus anticoagulant and anticardiolipin antibodies was recorded in a low-risk obstetric population, and the outcome of untreated pregnancies were evaluated. Two of 737 patients (0.27%) had lupus anticoagulant documented by a prolonged activated partial thromboplastin time that did not correct this mixing studies. In comparison, greatly elevated concentrations of immunoglobulin M-anticardiolipin antibodies or immunoglobulin G-anticardiolipin antibodies were identified in 16/737 (2.2%) patients by means of an enzyme-linked immunosorbent assay. Spontaneous abortions occurred in both lupus anticoagulant-positive patients, suggesting that the activated partial thromboplastin time used was a relatively insensitive but specific marker for antiphospholipid antibody-associated adverse pregnancy outcomes. In contrast, although 12 of 16 anticardiolipin antibodies-positive pregnancies were complicated by perinatal loss, preterm del...Continue Reading
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