PMID: 11898913Mar 20, 2002Paper

Fluctuations in levels of antiphospholipid antibodies and increased coagulation activation markers in normal and heparin-treated antiphospholipid syndrome pregnancies

Lupus
S DonohoeS J MacHin

Abstract

Antiphospholipid antibodies (aPL) are associated with an increased risk of thrombosis and recurrent miscarriage. We assessed levels of coagulation activation markers and aPL during normal pregnancy and in women with the antiphospholipid syndrome (aPS). Fluctuations in aPL levels were observed in all patients with aPS. No particular pattern of antibody positivity, or fluctuation in aPL level, was associated with poor pregnancy outcome. A significant increase was observed in levels of factor Xlla (FXIIa; P < 0.001), factor VIIa (FVIIa, P < 0.001), thrombin antithrombin complexes (TAT; P < 0.001), prothrombin fragment F1.2 (F1.2; P < 0.001) and D-dimer (DD; P < 0.05) during normal pregnancy. Factor VIIa, TAT, F1.2 and DD increased significantly before 20 weeks gestation, while a statistically significant increase in FXIIa levels was first detected between weeks 20 and 30 of gestation. In pregnant women with aPS, increases in FXIIa were similar to those in normal pregnancy, but increased FVIIa levels were not observed until after 30 weeks gestation. Similar to normal pregnancy, increased levels of TAT and F1.2 were detected in aPS pregnancies before 20 weeks gestation, but increased DD were not observed until after week 20. Surpris...Continue Reading

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