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  • Title: Typing for human platelet alloantigens.
    Author: Juji T, Saji H, Satake M, Tokunaga K.
    Journal: Rev Immunogenet; 1999; 1(2):239-54. PubMed ID: 11253950.
    Abstract:
    Antibodies to platelet alloantigens, and sometimes to isoantigens, induce severe clinical problems such as neonatal alloimmune thrombocytopenia (NAIT), post-transfusion purpura (PTP) and refractoriness to platelet transfusions (PTR). For example, NAIT affects approximately 1 in 5,000 live births. It is essential, therefore, to screen pregnant women for platelet antibodies in order to save babies' lives. Almost 40 years ago, two platelet alloantigen systems were discovered using relatively simple methods, namely the platelet agglutination test and the complement fixation test. However, these methods were not sensitive enough to identify all antibodies in mothers and patients, even in those with severe clinical problems. Tremendous effort has been devoted to establish more sensitive and reliable methods. In recent years, excellent new serological and immunochemical methods have been established and several new platelet antigen systems have been discovered. Simultaneously, newly developed molecular genetic techniques have been introduced for the typing and analysis of human platelet alloantigen systems. These methods allow DNA typing for cases in which serological typing is not available. In this article, the history of studies on human platelet alloantigen systems and isoantigens, the nomenclature of platelet alloantigen systems and their alleles, the present status of antibody detection and typing techniques and, finally, ethnic variations in platelet antigen profiles are reviewed.
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