Wölpl A, Toubert A, Siemoneit K, Eiermann TH, Neumayer H, Goldmann SF. Characterization of two human IgM monoclonal antibodies reactive with HLA-B27.
TISSUE ANTIGENS 1995;
46:305-12. [PMID:
8560449 DOI:
10.1111/j.1399-0039.1995.tb02497.x]
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Abstract
We describe here the generation and characterization of two human monoclonal IgM antibodies (UL-4F11 and UL-F6) reactive with HLA-B27. The monoclonal antibody (mAb) UL-4F11 is cytotoxic for peripheral mononuclear cells and, therefore, useful as typing reagent for HLA-B27 and HLA-B38. Protein chemistry showed that the mAb UL-4F11 precipitates HLA-B27 molecules. Epitope mapping analysis suggests that the amino acids 45, 67, 82 and 83 (alpha-1 domain) of the HLA-B27 sequence are necessary for mAb UL-4F11 reactivity. The mAb UL-F6 is suitable for complement dependent lysis of lymphoblastoid cell lines and stimulated peripheral blood mononuclear cells with HLA-B27 (B*2701, B*2702, B*2703, B*2705, B*2707), B13, B40 (60,61), B47 and B48 specificities. Its reactivity indicates that the amino acid valine in position 152 and glutamic acid in position 163 of the alpha-2 domain are crucial for the binding epitope.
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