Classification of major and minor blood group antigens in the Kuwaiti Arab population.

Ethnic differences in blood group frequencies might result in clinically important mismatches for transfusions. Arab people represent a large population for which no comprehensive database of red cell genotypes is available and Kuwaitis are no exception. For instance, the Rh blood group is the most elaborate blood group system that shows a high degree of polymorphism among different ethnic groups, there has been little classification of RH alleles in Arab people. Blood samples from 917 Kuwaiti Arab donors in the Kuwaiti Bone Marrow registry were tested with a single-nucleotide polymorphism DNA array. Blood group antigen prevalence were compared to known prevalence in European populations. Multiple subjects were found to be antigen negative for certain phenotypes that is considered rare by the American Rare Donor Program; (Fy(a-,b-) and Kell). In the minor blood group antigens, the FYA allele was predicted to be low in Kuwaitis, when compared to other published accounts. The frequencies of MNS blood antigens in the study population were not significantly different from those reported for European/Caucasian populations. The predicted frequency of the Diego blood group antigen was similar to that observed in a South Asian population. The weak D 1, 2, 3 phenotypes were not prevalent in the Kuwaiti Arab population; however, other RHD variants were detected. We provided information about blood group antigens in the Kuwaiti population that is important for guiding transfusion care. Several interesting findings demonstrated clinical importance, which could be useful in developing transfusion medicine policies and approaches.