title: Suppression of delayed type hypersensitivity induction to sheep red blood cells by concanavalin A in mice.
abstract: An examination was carried out on the in vivo effect of concanavalin A (Con A) on the induction of delayed-type hypersensitivity (DTH) to heterologous erythrocytes in mice. DTH induction was suppressed by an intravenous injection of 100 microng of Con A 1 day before, or simultaneously with immunization. This suppression was mediated by Con-A-activated spleen cells, and also by their cell-free extracts. However, this suppressive effect was abrogated by absorption of cell-free extracts with immunoadsorbent composed of rabbit anti-mouse thymocyte serum (ATS), indicating that suppressive factors for DTH induction make up one of the components extractable from Con-A-activated T cell population.
mesh_terms: D000818:Animals; D002474:Cell-Free System; D003208:Concanavalin A / Q000494:pharmacology*; D004306:Dose-Response Relationship, Immunologic; D004912:Erythrocytes / Q000276:immunology*; D005260:Female; D006968:Hypersensitivity, Delayed / Q000209:etiology*; D007111:Immunity, Cellular; D007166:Immunosuppressive Agents; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D012756:Sheep; D013154:Spleen / Q000276:immunology; D013997:Time Factors
chemical_list: D007166:Immunosuppressive Agents; D003208:Concanavalin A