title: Alloantigen-activated lymphocytes from mice bearing a spontaneous "nonimmunogenic" adenocarcinoma inhibit its growth in vivo by recruiting host immunoreactivity.
abstract: Nylon wool columns eluting lymphocytes from the spleen of mice bearing a clinically evident spontaneous, nonimmunogenic adenocarcinoma of recent origin (TS/A) do not display cytotoxic response, release of lymphokines, and proliferation in vitro against TS/A cells, nor do they inhibit TS/A tumor growth in a Winn-type neutralization assay in vivo. After 5-day co-culture with allogeneic spleen cells from mice differing at multiple minor histocompatibility antigens only, these lymphocytes are still noncytolytic against TS/A cells, whereas they release interferon-gamma, mediate delayed-type hypersensitivity (DTH) reactions, and inhibit TS/A tumor growth in the Winn assay. In the Winn test, alloactivated lymphocytes from TS/A tumor-bearing mice are more effective than those from normal mice on a per cell basis. The induction of this TS/A tumor inhibition ability depends on the presence in the cultures of Thy-1+ lymphocytes. The presence of Lyt-2+ lymphocytes is also important, whereas that of asialo GM1+ is not. The TS/A inhibition in vivo by alloactivated lymphocytes mostly depends on Thy-1+, Lyt-2- and asialo GM- lymphocytes, even though a few Thy- cells are also very efficient tumor inhibitors. The alloactivated lymphocytes inhibit TS/A tumor growth by recruiting the radiosensitive effector mechanisms of the recipient mice required for ultimate tumor rejection. TS/A tumor rejection leaves a specific DTH and an immunologic memory resulting in rejection of a second lethal TS/A challenge in a significant number of mice.
mesh_terms: D000230:Adenocarcinoma / Q000276:immunology* / Q000628:therapy; D000818:Animals; D000911:Antibodies, Monoclonal / Q000502:physiology; D002455:Cell Division; D002460:Cell Line; D002469:Cell Separation; D003165:Complement System Proteins / Q000502:physiology; D003602:Cytotoxicity, Immunologic; D005260:Female; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007156:Immunologic Memory; D007371:Interferon-gamma / Q000378:metabolism; D007519:Isoantigens / Q000276:immunology*; D008213:Lymphocyte Activation; D008212:Lymphocyte Depletion; D017710:Lymphocyte Transfusion; D008214:Lymphocytes / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D009368:Neoplasm Transplantation; D013154:Spleen / Q000166:cytology; D013899:Thoracic Neoplasms / Q000276:immunology* / Q000628:therapy
chemical_list: D000911:Antibodies, Monoclonal; D007519:Isoantigens; D007371:Interferon-gamma; D003165:Complement System Proteins