Abstract:
BACKGROUND AND OBJECTIVES:There is increasing interest in the development of rapid and reliable techniques for human platelet alloantigen (HPA) typing. This study investigates the reliability of flow cytometry for large-scale immunophenotyping of platelet alloantigens. MATERIALS AND METHODS:We used flow cytometry and polymerase chain reaction-site-specific primer (PCR-SSP) for the characterization of the human platelet antigen 1 (HPA-1) mosaic in blood donors. RESULTS:By using specific alloantisera and immunofluorescence labelling 9 (2.6%) out of 351 samples were HPA-1a-negative. To confirm this antigenic phenotype, all of the latter samples were submitted to PCR-SSP analysis, showing an HPA1-b/b genomic pattern. In HPA-1a-positive donors, flow cytometry was unable to distinguish HPA-1a/b heterozygous from HPA-1a/a homozygous subjects who were clearly identified by genotyping. CONCLUSIONS:Flow cytometry is a valuable tool for large-scale screening to identify HPA-1a-negative persons, whereas genotyping is the assay of choice for zygosity testing, antenatal diagnosis, and for thrombocytopenic alloimmunized patients.
journal_name
Vox Sangjournal_title
Vox sanguinisauthors
Tazzari PL,Cirillo D,Bontadini A,Ricci F,Masi R,Conte Rsubject
Has Abstractpub_date
1998-01-01 00:00:00pages
42-5issue
1eissn
0042-9007issn
1423-0410pii
vox74042journal_volume
74pub_type
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