The Kidd blood group antigens, Jkª and Jkᵇ , are two of the
main surface markers which are found on the membrane of red blood
cells. The determination of whether a donor or a recipient has the
Jkª and/or the Jkᵇ antigens is crucially important to have a successful
transfusion without the development of adverse incompatibility-related
reactions. In Malta, routine serological-based tests are applied with
the purpose of differentiating between homozygous and heterozygous
states for the Jk antigens respectively. Although these tests are
highly specific and sensitive, there are particular clinical scenarios
where haemagglutination assays are not suitable for determining the
individual’s Kidd blood group status. Additionally, the alternative
genotyping procedure has never been applied in Malta within the
context of blood grouping. The current study was therefore carried out
to determine whether a molecular-based technique such as Polymerase
Chain Reaction – Restriction Fragment Length Polymorphism analysis
(PCR-RFLP) is a suitable alternative procedure for distinguishing
amongst the three different Kidd phenotypes. After extracting
deoxyribonucleic acid (DNA) from 50 blood samples obtained from
serologically-tested healthy blood donors who expressed at least one of
the Kidd antigens, PCR-RFLP analyses were carried out. The results
of the latter were then compared with those previously obtained with
haemagglutination and a complete match was observed between the
two. Therefore, this PCR-RFLP method was confirmed as a suitable
alternative laboratory technique that can be used to determine
efficiently the Kidd blood group of both donors and recipients, in an
accurate manner without subjectivity as encountered in the case of
haemagglutination. This research further facilitates the introduction of
molecular-based techniques in molecular blood transfusion.peer-reviewe
