title: A monoclonal antibody (DT-2) recognizing canine T lymphocytes.
abstract: A murine monoclonal antibody (DT-2) is described which has been raised against canine thymocytes. DT-2 activates complement and is reactive with most canine thymocytes, peripheral blood T cells, thoracic duct lymphocytes, bronchoalveolar lymphocytes, and T chronic lymphatic leukemia cells. The antibody is nonreactive with surface immunoglobulin-positive blood lymphocytes, monocytes, bronchoalveolar macrophages, null acute lymphatic leukemia cells, granulocytes, erythrocytes, and platelets. In mixed lymphocyte cultures DT-2 and complement eliminate the responding but not the stimulating cell population. Mitogen stimulation (phytohemagglutinin, concanavalin A) experiments revealed that the responding cell affected by DT-2 is of lymphoid and not of monocyte/macrophage origin. All our data suggest that DT-2 is an antibody reacting specifically with canine T cells.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology* / Q000302:isolation & purification; D003601:Cytotoxicity Tests, Immunologic; D004285:Dogs; D005434:Flow Cytometry; D005455:Fluorescent Antibody Technique; D007945:Leukemia, Lymphoid / Q000276:immunology; D008213:Lymphocyte Activation; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D011948:Receptors, Antigen, T-Cell; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D011948:Receptors, Antigen, T-Cell