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  • Title: Evaluation of the plasma kinin system in dengue hemorrhagic fever.
    Author: Edelman R, Nimmannitya S, Colman RW, Talamo RC, Top FH.
    Journal: J Lab Clin Med; 1975 Sep; 86(3):410-21. PubMed ID: 1151158.
    Abstract:
    The role of the plasma kinin system in the pathogenesis of dengue hemorrhagic fever (DHF) ws explored by simultaneously measuring factor XLL (Hageman), prekallikrein, kallikrein inhibitors, bradykinin, and complement (C3) in the blood of Thai children with DHF and acute febrile illnesses other than dengue. Prekallikrein, factor XII, and C3 levels were significantly lower in DHF patients compared to fever control patients with the lowest mean levels found in dengue patients with shock. However, bradykinin concentrations were not elevated and mean activity levels of kallikrein inhibitors were not depressed in dengue patients. Two dengue patients first studies at least 2 days before onset of shock had falling C3 levels which were more closely related temporally to the onset of shock than were their rising levels of prekallikrein. The results fail to provide convincing evidence ofr activation of the plasma kinin system leading to free bradykinin or a significant role for bradykinin in the immunopathogenesis of DHF. By contrast, the results refocus attention on complement as a potentially important humoral mediator of the dengue shock syndrome.
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