Detection of tumor antigens by syngeneic antiserum on in vitro-transformed tracheal epithelial cell line 2-10-1.
Sera obtained from rats showing transplantation immunity to syngeneic, malignant epithelial cell line, 2-10-1, were used to identify antigens associated with transformation in vitro. The 2-10-1 cell line was derived from exposure of tracheal explants, in vitro, to the carcinogen MNNG. Tumorigenic passages of the cell line were shown to have common antigenic determinants, shared by independently transformed malignant tracheal epithelial cell lines, as well as antigenic determinants that appear to be limited to the immunizing cell line, 2-10-1. Care was taken to ensure that antibodies were not produced against viral antigens or non-specifically absorbed serum components. Early passages of the 2-10-1 cell line were not tumorigenic in athymic BALB/c (nu/nu) mice, but became malignant with serial passage in vitro. Antigenic specificities recognized by 2-10-1 immune sera were also present on early-passage 2-10-1 cells that had not as yet acquired the malignant phenotype. Such antigen expression must be an early event in neoplastic development.
D000818:Animals; D000951:Antigens, Neoplasm / Q000276:immunology*; D002460:Cell Line; D002471:Cell Transformation, Neoplastic; D003429:Cross Reactions; D000939:Epitopes; D005455:Fluorescent Antibody Technique; D007106:Immune Sera / Q000276:immunology*; D066298:In Vitro Techniques; D008769:Methylnitronitrosoguanidine; D051379:Mice; D008807:Mice, Inbred BALB C; D009368:Neoplasm Transplantation; D051381:Rats; D011916:Rats, Inbred F344; D014132:Trachea; D014181:Transplantation Immunology
D000951:Antigens, Neoplasm; D000939:Epitopes; D007106:Immune Sera; D008769:Methylnitronitrosoguanidine