title: Dissection of distinct human immunoregulatory T-cell subsets by a monoclonal antibody recognizing a cell surface antigen with wide tissue distribution.
abstract: A monoclonal antibody, PVR-11, was obtained after hybridization of X63Ag8.653 murine myeloma cells with spleen cells from a mouse immunized with human lymphocytes. It recognizes a 175,000- to 185,000-dalton surface antigen present on approximately 80% of normal human peripheral T lymphocytes, 50% of non-T non-B cells, and less than 10% of B cells as determined by complement-dependent microcytotoxicity. It is also present on various leukemia T cells, on some but not all T lymphoblastoid cell lines, and on a small fraction of some B lymphoblastoid cell lines. Some B-cell chronic lymphocytic leukemia cells also express the PVR-11 antigen. Functional analysis of normal human T lymphocytes demonstrated that the PVR-11-depleted T-cell subset contains the precursors of both cytotoxic and suppressor cells but lacks helper cells. On the other hand, cytotoxic effector T cells express the PVR-11 antigen. These results demonstrate that antigenic determinants with relatively wide tissue distribution can dissect functionally distinct human immunoregulatory T-cell subsets.
mesh_terms: D000906:Antibodies; D000911:Antibodies, Monoclonal; D000917:Antibody Formation; D000954:Antigens, Surface / Q000032:analysis*; D001402:B-Lymphocytes / Q000276:immunology; D002460:Cell Line; D002472:Cell Transformation, Viral; D002999:Clone Cells; D004854:Herpesvirus 4, Human / Q000276:immunology; D006801:Humans; D007938:Leukemia / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology; D014018:Tissue Distribution
chemical_list: D000906:Antibodies; D000911:Antibodies, Monoclonal; D000954:Antigens, Surface