A real-time PCR approach for rapid high resolution subtyping of HLA-DRB1*04.

We present a real-time PCR approach for the identification and subtyping of HLA-DR4 alleles. The technique, which uses sequence-specific primers and probes in conjunction with real-time PCR for the detection and differentiation of target alleles, is rapid, involves minimal hands-on time, and is inexpensive compared to existing methods. Further, there is no post-PCR handling, so the risk of contamination is avoided. We have validated the assay using 44 blinded and 56 unblinded samples, which were identified with 100% accuracy, sensitivity, and specificity. We demonstrate the applicability of this assay as an alternative approach to traditional HLA typing methods.