Neonatal alloimmune thrombocytopenia due to anti-HPA-5b (Br(a), Zav(a), Hca): the importance of third-generation platelet antibody detection techniques, a case report.

Autor: Allen DL; Regional Blood Transfusion Centre, John Radcliffe Hospital, Headington, Oxford, U.K., Floyd AP, Billson AL, Bell RA, Davis JG, Entwistle CC
Jazyk: angličtina
Zdroj: Transfusion medicine (Oxford, England) [Transfus Med] 1992 Dec; Vol. 2 (4), pp. 277-81.
DOI: 10.1111/j.1365-3148.1992.tb00170.x
Abstrakt: Investigation of the maternal serum in a case of suspected alloimmune neonatal thrombocytopenia by conventional, second-generation platelet serological assays (platelet radioactive antiglobulin test [PRAT], platelet suspension immunofluorescence test [PSIFT] and solid-phase adherence assay (SPAA, 'Capture-P') demonstrated only the presence of HLA class-I antibodies of limited specificities: no platelet-specific antibodies were detectable. The use of a third generation, glycoprotein capture assay (monoclonal antibody-specific immobilization of platelet antigens, MAIPA) revealed the additional presence of anti-HPA-5b with a titre of 1 in 32. Despite this relatively high titre, and the fact that it was able to induce a prolonged thrombocytopenia, this antibody was not detectable by conventional assays. In view of these findings we conclude that the use of MAIPA is essential when investigating cases of suspected alloimmune neonatal thrombocytopenia.
Databáze: MEDLINE
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