Andrea A. Zachary , Renato M. Vega , Donna P. Lucas , and Mary S. Leffell
Solid phase immunoassays for the detection and characterization of HLA-speci fi c antibodies provide greatly increased sensitivity, speci fi city, and time and reagent ef fi ciency, compared to the traditionally used cell-based methods. Testing is performed using commercially available test kits. The assays are of two general types: enzyme-linked immunosorbent assays and multianalyte bead. The types vary in both sensitivity
and equipment requirements.
While these assays afford great improvement over the cell-based assays, they can be confounded by interference from substances within the serum that result in high background reactivity. The high sensitivity of the assays also makes them more susceptible to environmental factors and operator variability. The user must be aware of the capabilities of the various formats, the factors that can affect test results, and lot to lot variability of any single product. Knowledge of the characteristics of each product and thorough and accurate analysis of the results are essential to the utility of these assays.
Key words: Enzyme-linked immunosorbent assays , HLA antibody , HLA phenotype panel , Luminex ® , Multianalyte bead assays , Pooled antigen panel , Single antigen panel , Solid phase immunoassays