Concluding Remarks
aPL are a heterogeneous population of antibodies directed against different phospholipid binding proteins. It is not clear which mechanism is responsible for the thrombogenic activity of all aPL. There is, however, an attractive hypothesis that suggests that aPL selectively inhibit one of the dominant natural anticoagulant pathways, the protein C pathway. Most attention has been focused on the induction of an acquired APC resistance, probably due to interference of the antibodies with binding of protein C or S to negatively charged phospholipids It is questionable whether in aPL-related thrombosis, an acquired APC resistance is responsible for both arterial and venous events. Although exogenous APC could prevent arterial thrombosis in a number of animal models, deficiencies in the protein C axis are correlated with venous thrombosis and not with arterial thrombosis. A safe conclusion is that interference of the protein C pathway can explain a large part of the venous complications in patients with APS. The observations that suggest a correlation between antibodies against EPCR and pregnancy morbidity warrant further studies.
Keywords
- Systemic Lupus Erythematosus
- Lupus Anticoagulant
- Anticoagulant Pathway
- Endothelial Cell Protein
- Hughes Syndrome
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de Groot, P.G., Derksen, R.H.W.M. (2006). The Influence of Antiphospholipid Antibodies on the Protein C Pathway. In: Khamashta, M.A. (eds) Hughes Syndrome. Springer, London. https://doi.org/10.1007/1-84628-009-5_34
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