title: [Frequency of platelet alloantigens in the Spanish population].
abstract: OBJECTIVE
  The aim of this study is to investigate the distribution and incidence of platelet alloantigens in Spain and to compare this frequency with that found in other populations.
  
  
  METHODS
  Five hundred blood donors were phenotyped for the HPA-1a (Zwa), HPA-3a (Bak(a)), HPA-4a (Yukb/Pen(a)) y HPA-4b (Yuk(a)). One hundred of these donors were also phenotyped for the HPA-5a (Br(a)) antigen. Furthermore, we also phenotyped a group of 50 black individuals from a community of west African immigrants who live in the province of Barcelona. The typing of all the antigens except those of the HPA-5 system was carried out using the technique of Indirect Immunofluorescence. To type the antigens of the HPA-5 system the MAIPA technique was employed.
  
  
  CONCLUSIONS
  The incidence of the different platelet specific antigens in the Spanish population is, in general, the same as that detected in the other European countries and in the white population of the USA. In Europe and North America, the HPA-1a antigen is the most important of all owing to its involvement in alloimmune clinical disorders. In Asia, this role seems to be played by the HPA-4b antigen. Moreover, polymorphism for the HPA-1a allele does not seem to exist. The incidence of the HPA-5b (Br(a)) antigen in Spain, which is higher than that for France and Germany, suggests a high involvement of this antigen in our country in different alloimmune processes. The preliminary data obtained in a group of black west Africans suggest the absence on polymorphism for the HPA-1a allele and that the incidence of the remaining antigens is comparable to that of the Spanish population.
authors.affiliation: Servicio de Hemoterapia, Hospital de la Santa Creu i Sant Pau, Barcelona.
authors.forename: E
authors.initials: E
authors.lastname: Muñiz-Díaz
authors.forename: M
authors.initials: M
authors.lastname: Arilla
authors.forename: M
authors.initials: M
authors.lastname: Ibáñez
authors.forename: M A
authors.initials: MA
authors.lastname: Bosch
authors.forename: C
authors.initials: C
authors.lastname: Pastoret
authors.forename: P
authors.initials: P
authors.lastname: Madoz
mesh_terms: D000354:Africa, Western / Q000208:ethnology; D000483:Alleles; D016824:Antigens, Human Platelet / Q000032:analysis / Q000235:genetics*; D005006:Ethnicity / Q000235:genetics; D005455:Fluorescent Antibody Technique; D005787:Gene Frequency; D006801:Humans; D010641:Phenotype; D010980:Platelet Membrane Glycoproteins / Q000032:analysis / Q000235:genetics*; D011110:Polymorphism, Genetic; D044469:Racial Groups / Q000235:genetics; D013030:Spain
chemical_list: D016824:Antigens, Human Platelet; D010980:Platelet Membrane Glycoproteins
vernacular_title: Frecuencia de los aloantígenos de las plaquetas en población española.