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  • Title: Comparative study of three methods to detect free plasma antiplatelet antibodies.
    Author: Gonzalez-Conejero R, Rivera J, Rosillo MC, Lozano ML, García VV.
    Journal: Acta Haematol; 1996; 96(3):135-9. PubMed ID: 8876609.
    Abstract:
    We have compared three techniques for the detection of plasma circulating antiplatelet antibodies, i.e., the platelet suspension immunofluorescence test (PSIFT), the platelet radioactive antiglobulin test (PRAT), and the monoclonal antibody immobilization of platelet antigens (MAIPA). Frozen plasma samples from patients with idiopathic thrombocytopenic purpura or HIV-associated thrombocytopenia were used in the study. The PSIFT and PRAT showed the appropriate ease of performance necessary for screening purposes. The PSIFT is free of radioactivity hazards, but seemed to be less sensitive than the PRAT. The MAIPA is a useful tool to detect antibodies against glycoproteins (GPs) Ib/IX and IIb/IIIa. However, in comparison to PSIFT and PRAT, MAIPA is more time consuming, requires considerable technical expertise, and the identification of antiplatelet activity is highly dependent on the selection of an appropriate primary anti-GP monoclonal antibody. This could explain the lower prevalence of antiplatelet activity detected by MAIPA, in comparison to the frequency provided by the PSIFT and PRAT.
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