title: Studies of EBV-lymphoid cell interactions in two patients with the X-linked lymphoproliferative syndrome: normal EBV-specific HLA-restricted cytotoxicity.
abstract: Two X-linked lymphoproliferative syndrome (XLP) patients with the hypogammaglobulinemia phenotype were investigated at a time remote from their primary infection with the Epstein-Barr virus (EBV). The lymphoblastoid cell lines derived from these patients expressed the phenotypic markers characteristic of normal mature B lymphocytes and produced normal levels of immunoglobulins (Ig). These observations imply that at least some of their B cells are phenotypically normal. The natural killer (NK) activity of the two patients was low. In one patient, activated lymphocyte killer (ALK) activity was inefficient. These two XLP patients expressed a normal EBV-specific, HLA-restricted cytotoxic activity. It thus appears, from the present findings and those in cases published previously (6/11 patients expressing normal EBV-specific cytotoxic activity), that the notion of poor specific T cell memory for EBV may not be as pivotal ass suggested or, alternatively, that this defect may not be common in hypogammaglobulinemic survivors.
mesh_terms: D000293:Adolescent; D000361:Agammaglobulinemia / Q000235:genetics / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology; D002648:Child; D003602:Cytotoxicity, Immunologic; D008040:Genetic Linkage; D006680:HLA Antigens / Q000276:immunology; D006566:Herpesviridae Infections / Q000235:genetics / Q000276:immunology*; D004854:Herpesvirus 4, Human / Q000276:immunology*; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology*; D008297:Male; D014960:X Chromosome / Q000276:immunology
chemical_list: D006680:HLA Antigens