title: The involvement of antigen-presenting cells and suppressor cells in the ultraviolet radiation-induced inhibition of secondary cytotoxic T cell sensitization.
abstract: When mice were treated with ultraviolet (UV) radiation before immunization with the skin sensitizers, trinitro-chlorobenzene or dinitrofluorobenzene, they showed greatly depressed levels of priming for a secondary in vitro cytotoxic response against haptenated cells. Because the irradiation and skin painting were done on separate sites, these results suggest that the UV radiation had a systemic effect. The priming response of irradiated mice to allogeneic stimulation was normal, indicating some antigen selectivity to the inhibitory effect of UV radiation. A defect in antigen-presenting cells, previously demonstrated in UV-irradiated mice, was found to be largely responsible for the depressed priming response observed in these animals. In addition, the UV-irradiated, immunized mice possessed suppressor cells that were capable of blocking priming for cytotoxic responses against haptenated cells in normal mice.
mesh_terms: D000818:Animals; D003602:Cytotoxicity, Immunologic / Q000528:radiation effects*; D004139:Dinitrofluorobenzene / Q000276:immunology; D005260:Female; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007111:Immunity, Cellular / Q000528:radiation effects; D007114:Immunization; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D013154:Spleen / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*; D014301:Trinitrobenzenes / Q000276:immunology
chemical_list: D014301:Trinitrobenzenes; D004139:Dinitrofluorobenzene