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  • Title: Increased soluble vascular cell adhesion molecule 1 concentrations in patients with primary or systemic lupus erythematosus-related antiphospholipid syndrome: correlations with the severity of thrombosis.
    Author: Kaplanski G, Cacoub P, Farnarier C, Marin V, Grégoire R, Gatel A, Durand JM, Harlé JR, Bongrand P, Piette JC.
    Journal: Arthritis Rheum; 2000 Jan; 43(1):55-64. PubMed ID: 10643700.
    Abstract:
    OBJECTIVE: Recent studies have shown that in vitro endothelial cells are activated by antiphospholipid antibodies and may support leukocyte adhesion. We studied levels of soluble intercellular adhesion molecule 1 (sICAM-1, sCD54), soluble vascular cell adhesion molecule 1 (sVCAM-1, sCD106), and soluble E-selectin (soluble endothelial leukocyte adhesion molecule 1 [sELAM-1, sCD62E]) in sera from patients with primary antiphospholipid syndrome (primary APS), and compared them with those from patients with systemic lupus erythematosus-associated APS (SLE-APS) or pure SLE, as well as with those from 2 control groups composed of healthy volunteers and patients with thrombosis unrelated to autoimmune diseases. METHODS: Serum samples from 24 patients with primary APS, 15 patients with SLE-APS, 22 patients with pure SLE, 48 control patients with thrombosis, and 18 healthy volunteers were examined using enzyme-linked immunosorbent assays specific for sICAM-1, sVCAM-1, and sELAM-1. RESULTS: Serum levels of sVCAM-1, but not sICAM-1 or sELAM-1, were significantly increased in all patient study groups compared with thrombosis control patients and healthy volunteers, but did not differ between the groups of patients with primary APS, SLE-APS, or pure SLE. Concentrations of sVCAM-1 were significantly higher in primary APS or SLE-APS patients with severe, recurrent thrombosis and were negatively correlated with platelet counts in primary APS patients. In patients with primary APS, sVCAM-1 levels were higher if there was thrombotic kidney involvement and correlated with creatinemia. CONCLUSION: Serum sVCAM-1 concentrations are increased in patients with primary APS, especially those with repeated thrombotic events or kidney involvement. These findings suggest that endothelial/ monocyte interaction may be important in the pathogenesis of primary APS.
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