title: The HLA-dependent expression of testis- organizing H-Y antigen by human male cells.
abstract: The proposal that the stable expression of organogenesis-directing plasma membrane antigens, such as testis-organizing H-Y antigen, requires beta2-microglobulin-MHC antigen dimers as anchorage sites was tested on Daudi human Burkitt lymphoma cells [46, XY, 15q-, 14q+, beta2-m(-), HLA(-)]. The H-Y antigen level of Daudi was only 20% of that of Raji and Ramos, two human male pseudodiploid Burkitt lymphoma lines that were beta2-m(+), HLA(+). When Daudi is hybridized with beta2-m(+), HLA(+) cell lines, beta2-microglobulin, supplied by the latter, is known to restore the expression of Daudi HLA antigens A10 and BW17. Such restoration of HLA antigen expression markedly elevated H-Y antigen levels in those somatic hybrids. Thus the H-Y antigen level of the Daudi x Raji 8A (male X male) hybrid became equal to that of TetraRaji--the colcemide-induced Raji tetraploid line. Two independently derived Daudi x Hela D98 (male x female) hybrids, DAD 1 and DAD 10, demonstrated even higher H-Y antigen levels comparable to that of normal male peripheral blood lymphocytes.
mesh_terms: D000941:Antigens; D001609:Beta-Globulins / Q000378:metabolism*; D001665:Binding Sites; D002460:Cell Line; D002462:Cell Membrane / Q000276:immunology*; D006680:HLA Antigens; D006801:Humans; D006822:Hybrid Cells; D008297:Male; D013737:Testis; D001613:beta 2-Microglobulin / Q000378:metabolism*
chemical_list: D000941:Antigens; D001609:Beta-Globulins; D006680:HLA Antigens; D001613:beta 2-Microglobulin