title: Production of monoclonal antibodies using spleen cells from nude mice bearing human tumors.
abstract: Monoclonal antibodies were generated with spleen cells from nude mice bearing human tumors. Three grafted tumors were selected because of their difference in metastatic ability in nude mice. Two were non-metastasizing carcinomas and one a highly metastasizing adenocarcinoma of the lung (Bur-tumor). Two normal nude mice were used as controls. Culture supernatants were screened by immunoperoxidase using frozen sections from both the immunizing human tumor and normal human tonsil to detect unexpected monoclonal antibodies. Two kinds of monoclonal antibodies were obtained. The first were directed against miscellaneous membrane and/or cytoplasmic antigens expressed by normal cells (e.g. normal tonsillar epithelium). Most of these antibodies corresponded to auto-antibodies and their frequency did not appear to be influenced by the fact that the mice were with or without grafted human tumors. The second type of antibodies were directed against tumor-associated antigen and generated only by fusing splenocytes from nude mice bearing the metastasizing lung adenocarcinoma. On frozen sections Bur-1-anti-tumor antibody stained all but one lung carcinoma. Occasional carcinomas originating from other organs such as pancreas and breast were also labelled. On the other hand, more than half of the cases of so-called "malignant histiocytosis" (Ki-1 lymphoma) seemed to express this epithelial antigen. Some normal cells in the lung, pancreas (acini), and kidney (distal tubules) also bound Bur-1 antibody. These results suggested that Bur-1 antibody could be related to some antibodies already described, directed against epithelial membrane antigens. When Bur-tumor was analysed by immunoblotting with Bur-1 antibody a positive reaction was obtained with material migrating in the kD-45kD molecular-weight region.
mesh_terms: D000230:Adenocarcinoma / Q000276:immunology*; D002288:Adenocarcinoma, Mucinous / Q000276:immunology*; D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis* / Q000276:immunology; D000912:Antibodies, Neoplasm / Q000096:biosynthesis* / Q000276:immunology; D000918:Antibody Specificity; D003110:Colonic Neoplasms / Q000276:immunology*; D003429:Cross Reactions; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000276:immunology*; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D012878:Skin Neoplasms / Q000276:immunology*; D013154:Spleen / Q000276:immunology; D014183:Transplantation, Heterologous
chemical_list: D000911:Antibodies, Monoclonal; D000912:Antibodies, Neoplasm