title: Characterization of lectin-induced cellular cytotoxicity mediated by mouse spleen cells and the role of lymphotoxin.
abstract: The cellular cytotoxicity mediated by mouse spleen cells in the presence of mitogenic or non-mitogenic lectins was established under serum-free conditions and characterized. Compared with the lectin-induced cellular cytotoxicity (LICC) in the guinea-pig, the activity of lymphotoxin (LT) released into the murine LICC assay cultures was very low. However, a positive correlation was found between the strength of LICC and the LT activity released into the supernatants. Moreover, the addition of puromycin, a potent enhancing reagent of guinea-pig LT activity, markedly promoted the LICC when added 4 h after the initiation of the LICC culture. These data, taken together, suggest that LT acts as an effector molecule in the murine LICC systems as well as in the guinea-pig LICC systems. Properties of the effector cell populations mediating LICC were investigated by depletion of plastic-adherent or nylon-wool adherent cells, by treatment of spleen cells with anti-T-cell sera and complement, and by use of nude mouse spleen cells. The results obtained suggest that both concanavalin A and phytohaemagglutinin-P can induce nylon-wool non-adherent T-cell mediated LICC, phytohaemagglutinin-W was found to be capable of inducing both the nylon-wool non-adherent T-cell mediated LICC and the nylon-wool adherent non-T-cell mediated LICC, the major effector of Bauhinia purpurea agglutinin-LICC was found to be the nylon-adherent non-T-cell population.
mesh_terms: D000818:Animals; D002448:Cell Adhesion; D003208:Concanavalin A / Q000494:pharmacology; D003602:Cytotoxicity, Immunologic; D004306:Dose-Response Relationship, Immunologic; D005260:Female; D006168:Guinea Pigs; D037102:Lectins / Q000276:immunology*; D008233:Lymphotoxin-alpha / Q000037:antagonists & inhibitors / Q000276:immunology*; D008297:Male; D051379:Mice; D010835:Phytohemagglutinins / Q000494:pharmacology; D011691:Puromycin / Q000494:pharmacology; D013154:Spleen / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D037102:Lectins; D008233:Lymphotoxin-alpha; D010835:Phytohemagglutinins; D003208:Concanavalin A; D011691:Puromycin