title: Role of L3T4 antigen in the activation of various functions of Lyt-1+2- T cells against vaccinia virus.
abstract: The present study defines assay systems for vaccinia virus-reactive Lyt-1+2- T cells mediating various functions and investigates the positivity of L3T4 antigen on these Lyt-1+2- T cells as well as the role of L3T4 antigen in the activation of these T cells with respect to their functions. C3H/He mice were immunized against vaccinia virus by inoculating viable virus intraperitoneally (i.p.). Anti-vaccinia virus reactivity in lymphoid cells from these immunized mice was assessed by proliferative response, helper T cell activities involved in cytotoxic T lymphocyte (CTL) and B cell (antibody) responses, delayed type-hypersensitivity (DTH) response, and production of lymphokines such as interleukin 2 (IL2) and macrophage-activating factor (MAF). The results demonstrate that all of the above anti-vaccinia virus responses were mediated by Lyt-1+2- T cells and that these Lyt-1+2- T cells expressed L3T4 antigens on their cell surfaces. Moreover, such anti-vaccinia Lyt-1+2- T cell responses were inhibited in the presence of anti-L3T4 antigen antibody. These results indicate that there is a reciprocal relationship between Lyt-2 and L3T4 markers, and that L3T4 antigen is closely related to the activation of various functions of anti-vaccinia virus Lyt-1+2- T cells.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface / Q000502:physiology*; D003602:Cytotoxicity, Immunologic; D005260:Female; D006649:Histocompatibility Antigens / Q000276:immunology; D008213:Lymphocyte Activation; D008222:Lymphokines / Q000096:biosynthesis; D051379:Mice; D008809:Mice, Inbred C3H; D013601:T-Lymphocytes / Q000145:classification* / Q000276:immunology / Q000378:metabolism; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*; D014616:Vaccinia virus / Q000502:physiology*
chemical_list: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D006649:Histocompatibility Antigens; D008222:Lymphokines