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Publication Detail
Increased circulating platelet-leucocyte complexes and platelet activation in patients with antiphospholipid syndrome, systemic lupus erythematosus and rheumatoid arthritis
  • Publication Type:
    Journal article
  • Publication Sub Type:
  • Authors:
    Joseph JE, Harrison P, MacKie IJ, Isenberg DA, MacHin SJ
  • Publication date:
  • Pagination:
    451, 459
  • Journal:
    British Journal of Haematology
  • Volume:
  • Issue:
  • Print ISSN:
  • Keywords:
    ACTIVATION, adult, Aged, AGENT, AGENTS, annexin, Annexin V, antibodies, Antibody, antiphospholipid, Antiphospholipid Syndrome, Arthritis, Arthritis, Rheumatoid, As, Aspirin, BINDING, Blood, Blood Platelets, Cell Aggregation, Cell Degranulation, circulating, COMPLEX, COMPLEXES, control, cytometry, drug effects, EC, expression, Female, flow, Flow Cytometry, FLOW-CYTOMETRY, IM, in vivo, in-vivo, INCREASED RISK, LA, leukocytes, LEVEL, Lupus, Lupus Erythematosus, Systemic, Male, May, metabolism, Middle Age, Note, NUMBER, NUMBERS, P Selectin, P-Selectin, Patient, patients, pharmacology, phosphatase, physiology, Platelet, Platelet Activation, Platelet Count, play, Protein-Tyrosine-Phosphatase, Rheumatoid arthritis, RHEUMATOID-ARTHRITIS, Risk, Role, secondary, sensitive, SLE, soluble P selectin, SOLUBLE P-SELECTIN, Syndrome, SYSTEMIC, SYSTEMIC LUPUS ERYTHEMATOSUS, SYSTEMIC-LUPUS-ERYTHEMATOSUS, therapeutic, Thrombosis, Use, vivo, Warfarin
  • Notes:
    UI - 21560286 LA - eng RN - 0 (Annexin V) RN - 0 (P-Selectin) RN - 50-78-2 (Aspirin) RN - 81-81-2 (Warfarin) RN - EC 3.1.3.- (PAC1 phosphatase) RN - EC (Protein-Tyrosine-Phosphatase) PT - Journal Article DA - 20011112 IS - 0007-1048 SB - IM CY - England
It is possible that platelet activation may play a pathogenic role in the increased risk of thrombosis associated with antiphospholipid antibodies (APA). In this study, levels of in vivo platelet activation were measured in 20 patients with primary antiphospholipid syndrome (PAPS) and 30 systemic lupus erythematosus (SLE) patients (14 of whom had secondary APS) using sensitive flow cytometry. Soluble P-selectin levels were also assayed. Platelet CD63 expression was significantly higher in PAPS than normal controls (P = 0.007), as well as SLE patients with and without secondary APS (P = 0.03 and P = 0.002 respectively). PAC-1 binding was significantly higher in PAPS than the control group (P = 0.007) and SLE patients without APS (P = 0.015). Platelet-leucocyte complexes were significantly higher in SLE patients than both PAPS and the control group, and platelet-monocyte complexes were significantly increased in PAPS compared with the control group. (Platelet-leucocyte complexes were also significantly higher than controls in 10 rheumatoid arthritis (RA) patients without APA). Soluble P-selectin levels were significantly higher in PAPS and SLE patients than the control group. Platelet CD62p expression, annexin V binding and platelet microparticle numbers were not increased in PAPS or SLE patients. We conclude that there is evidence of increased platelet activation in PAPS and SLE, and this is important to note as it may have potential therapeutic implications with respect to use of antiplatelet agents in these patients
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