title: T cell proliferation induced by anti-CD3 antibodies: requirement for a T-T cell interaction.
abstract: In the presence of interleukin 2 (IL2), soluble anti-CD3 monoclonal antibodies can stimulate highly purified normal T lymphocytes to proliferate. In these experiments HLADR+ T cells constituted 13 to 20% of the total cell population, and other HLADR+ cells, such as monocytes and B lymphocytes, constituted less than 1% of the population. When the HLADR+ T cells were removed from the total T cell population by cytofluorometric sorting, the residual HLADR- T cells failed to respond to soluble anti-CD3 plus IL2. When the separated HLADR+ T cells were recombined with the HLADR- T cells, a response was again found. This response was dependent on the dose of HLADR+ T cells added in the mixture. Irradiation individually of the HLADR+ and DR- T cells revealed that the proliferation in the cell mixture was predominantly, if not exclusively, by the HLADR- T cells. The ability of the HLADR+ T cells to provide a signal necessary to this proliferation was radioresistant. These data indicate that under the conditions of these experiments HLADR+ ("activated") T cells provide a signal necessary to the responsiveness of previously resting T cells.
authors.affiliation: Department of Basic and Clinical Research, Research Institute of Scripps Clinic, La Jolla, San Diego, CA.
authors.forename: J
authors.initials: J
authors.lastname: Bentin
authors.forename: J H
authors.initials: JH
authors.lastname: Vaughan
authors.forename: C D
authors.initials: CD
authors.lastname: Tsoukas
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D000937:Antigen-Antibody Reactions; D000945:Antigens, Differentiation, T-Lymphocyte / Q000276:immunology*; D017252:CD3 Complex; D004247:DNA / Q000096:biosynthesis; D006684:HLA-DR Antigens / Q000032:analysis; D006801:Humans; D066298:In Vitro Techniques; D007376:Interleukin-2 / Q000494:pharmacology; D008213:Lymphocyte Activation; D008211:Lymphocyte Cooperation; D011948:Receptors, Antigen, T-Cell / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D017252:CD3 Complex; D006684:HLA-DR Antigens; D007376:Interleukin-2; D011948:Receptors, Antigen, T-Cell; D004247:DNA