title: Natural killer cell activity and autologous mixed lymphocyte response of splenic, mesenteric lymph node, and colonic lymphocytes during DMH-induced colon carcinogenesis in the rat.
abstract: Two in vitro models of immune surveillance were used to examine the immune status of the gut-associated lymphoid tissue, mesenteric lymph nodes, and spleen during the early stages of 1,2-dimethylhydrazine (DMN)-induced colon tumorigenesis. DMH- and vehicle-treated Fischer rats were sacrificed at one of three time points: one week, two months, or five months after cessation of treatment. Colonic, lymph node, and splenic natural killer cell cytolytic activity toward YAC-1 tumor targets and T-cell response to autologous Ia-induced blastogenesis were measured at each time point. We found little change in natural killer cell activity or T-cell proliferation induced by autologous Ia gene products at these time periods.
mesh_terms: D000818:Animals; D003106:Colon / Q000276:immunology*; D003110:Colonic Neoplasms / Q000276:immunology*; D003602:Cytotoxicity, Immunologic; D004127:Dimethylhydrazines; D007694:Killer Cells, Natural / Q000276:immunology*; D008198:Lymph Nodes / Q000276:immunology*; D007959:Lymphocyte Culture Test, Mixed; D008214:Lymphocytes / Q000276:immunology*; D008643:Mesentery / Q000276:immunology; D009374:Neoplasms, Experimental / Q000276:immunology; D051381:Rats; D011919:Rats, Inbred Strains; D013154:Spleen / Q000276:immunology
chemical_list: D004127:Dimethylhydrazines