HLA CLASS-II GENOTYPING - 2 ASSAY SYSTEMS COMPARED

In the last few years, a variety of DNA-based human leukocyte antigen (HLA) typing methods have emerged, revealing the extreme polymorphism of HLA genes. This polymorphism makes it difficult for a clinical labo ratory to establish the best HLA typing strategy. In this study we hav e compared two techniques for performing HLA-DRB typing: a commercial rapid assay based on the polymerase chain reaction (PCR) followed by r everse dot-blot hybridization of the PCR products (the Inno-LiPA assay ), and a method based on PCR followed by restriction fragment length p olymorphism analysis. We found that both methods provide reliable resu lts with a high rate of concordance (97%) and that Inno-LiPA is conven ient for large-scale routine typing. However, if a high-resolution all elic typing is required, each method lacks accuracy but using them in association improves the accuracy of the results.