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  • Title: Tissue plasminogen activator, plasminogen activator inhibitor-1 and von Willebrand factor in rheumatoid arthritis.
    Author: Wållberg-Jonsson S, Dahlén GH, Nilsson TK, Rånby M, Rantapää-Dahlqvist S.
    Journal: Clin Rheumatol; 1993 Sep; 12(3):318-24. PubMed ID: 8258230.
    Abstract:
    Tissue plasminogen activator (tPA), plasminogen activator inhibitor-1 (PAI-1) and von Willebrand factor (vWF), all of endothelial origin and active in the haemostasis, were analysed in 74 patients with rheumatoid arthritis. The concentrations were related to extra-articular disease and to the incidence of thromboembolic events (TE) registered in a 2-year follow-up period. Patients with extra-articular disease had a significant increase in PAI-1 activity and reduced tPA release in the venous occlusion test. von Willebrand factor, PAI-1 and also haptoglobin and triglycerides were significantly increased in the group of patients who later suffered from TE. In a multiple regression model, in which cholesterol, triglycerides and lipoprotein (a) showed significant association with TE, vWF had the strongest additive explanatory value. No distinct acute phase pattern of PAI-1 was found in any patient subgroup.
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