title: Inhibition of macrophage-induced antigen-specific T lymphocyte proliferation by poly I:C: strain and antigen independence.
abstract: We have previously demonstrated that IFN-alpha/beta, poly I:C (an inducer of IFN-alpha/beta), and IFN-gamma can inhibit the ability of KLH-pulsed peritoneal macrophages to induce proliferation of syngeneic, KLH immune T lymphocytes in CBA/J mice. In this study, we show that this IFN-induced immunosuppression is not restricted to CBA/J (H-2k) mice but is also seen in BALB/cJ (H-2d) mice. A similar inhibition of proliferation is observed with the KLH-specific T cell hybridoma BDK, 100, which requires KLH-pulsed macrophages for optimum proliferation and IL-2 production. The immunosuppression produced by IFN was also independent of the antigen employed. Inhibition of T lymphocyte proliferation was observed when casein, instead of KLH, was used to immunize T cells and to pulse peritoneal macrophages in vivo. Utilizing KLH and casein, the antigen specificity of the inhibition was demonstrated. Therefore, the inhibition by the IFN-inducer poly I:C of macrophage-induced, antigen-specific T cell proliferation is not limited by H-2 type of the mice or to one antigen.
authors.affiliation: Department of Microbiology & Immunology, Medical College of Pennsylvania, Philadelphia 19129.
authors.forename: D A
authors.initials: DA
authors.lastname: Kirschmann
authors.forename: D M
authors.initials: DM
authors.lastname: Murasko
mesh_terms: D000818:Animals; D004305:Dose-Response Relationship, Drug; D006433:Hemocyanins / Q000276:immunology; D006825:Hybridomas / Q000276:immunology; D007371:Interferon-gamma / Q000494:pharmacology; D007376:Interleukin-2 / Q000096:biosynthesis; D008213:Lymphocyte Activation / Q000187:drug effects*; D008264:Macrophages / Q000502:physiology*; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D011070:Poly I-C / Q000494:pharmacology*; D013045:Species Specificity; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D007376:Interleukin-2; D007371:Interferon-gamma; D006433:Hemocyanins; C032808:keyhole-limpet hemocyanin; D011070:Poly I-C