title: Potentiation by carbon tetrachloride of the immunosuppressive effects of fibrosarcoma and toxic material produced by fibrosarcoma cells.
abstract: SaD2-AG fibrosarcomas growing in DBA/2 mice caused nonspecific immunodepression. Injection of soluble material produced by cultured SaD2-AG cells into normal DBA/2 recipients caused nonspecific immunodepression and signs of systemic toxicity. These in vivo effects were enhanced by prior treatment of the recipients with carbon tetrachloride (CCl4). In contrast, material released by syngeneic fibroblasts was neither immunosuppressive nor toxic to normal mice or mice previously treated with CCl4. A soluble toxic material released by the fibrosarcoma cells may be responsible for at least some of the systemic effects of localized SaD2-AG tumors growing at a site not involving vital structures, and a protective host mechanism whose maximum capacity can be decreased by the administration of CCl4 may minimize the toxic effects of the cancer-derived material.
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D002251:Carbon Tetrachloride / Q000494:pharmacology*; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D005354:Fibrosarcoma / Q000276:immunology* / Q000378:metabolism; D007104:Immune Adherence Reaction; D008099:Liver / Q000187:drug effects; D051379:Mice; D008811:Mice, Inbred DBA; D009043:Motor Activity / Q000187:drug effects; D012513:Sarcoma, Experimental / Q000276:immunology; D014118:Toxins, Biological / Q000096:biosynthesis
chemical_list: D014118:Toxins, Biological; D002251:Carbon Tetrachloride