title: Gene frequencies of human platelet alloantigens in Bahraini Arabs.
abstract: Human platelet antigens (HPA) are implicated in the pathophysiology of certain hematological disorders, and as varied distribution of HPA-1 alleles and genotypes were reported fordifferent countries and ethnic populations, we determined the distribution of HPA-1, -2, -3, -4, and -5 alleles, genotypes and haplotypes for 194 healthy Bahraini subjects by polymerase chain reaction with sequence specific primers. The distribution of the HPA polymorphisms was in Hardy-Weinberg equilibrium. Allele frequencies of 0.76 and 0.24 (HPA-1a and -1b), 0.77 and 0.23 (HPA-2a and -2b), 0.57 and 0.43 (HPA-3a and -3b), 0.93 and 0.07 (HPA-4a and -4b), and 0.86 and 0.13 (HPA-5a and -5b) were seen. With the exception of HPA-3a/a (30.4%), the frequencies of homozygous HPA-1a/a (56.8%), 2a/a (60.1%), 4a/a (87.2%), and 5a/a (75.7%) were higher than those of heterozygous (a/b) or homozygous (b/b) variants. Our results provide basic information for further studies of the HPA system polymorphism, which in turn will be instrumental in understanding and treating immune-mediated platelet disorders.
authors.affiliation: Department of Medical Biochemistry, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain.
authors.forename: Abeer M
authors.initials: AM
authors.lastname: Al-Subaie
authors.forename: Iman K
authors.initials: IK
authors.lastname: Al-Absi
authors.forename: Khadija
authors.initials: K
authors.lastname: Al-Ola
authors.forename: Sarra
authors.initials: S
authors.lastname: Saidi
authors.forename: Naglaa A
authors.initials: NA
authors.lastname: Fawaz
authors.forename: Wassim Y
authors.initials: WY
authors.lastname: Almawi
mesh_terms: D000328:Adult; D016824:Antigens, Human Platelet / Q000235:genetics*; D018912:Arabs / Q000235:genetics*; D001445:Bahrain; D005260:Female; D005787:Gene Frequency; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D008297:Male; D011110:Polymorphism, Genetic
chemical_list: D016824:Antigens, Human Platelet