Correlation between tumor-specific surface antigens and src gene expression in Rous sarcoma virus-induced rat tumors.
Immunization with Rous sarcoma virus (RSV)-induced mouse tumors or with SR-3Y1 or NY8-3Y1 rat fibroblasts transformed by a wild type RSV or an env gene deletion mutant of RSV induced complete transplantation resistance against an RSV-induced mouse tumor (CSA1M) in syngeneic hosts. On the other hand, 10 of 19 mice immunized with ts68-3Y1 rat fibroblasts transformed by an src gene temperature-sensitive mutant of RSV (permissive temperature: 33-35 degrees C) could not reject the CSA1M. SR-3Y1, NY8-3Y1 and RSV-induced mouse tumors expressed a common tumor-specific cell-surface antigen (TSSA) detected by a syngeneic rat antiserum against NY8-3Y1. In ts68-3Y1, expression of the TSSA was temperature-sensitive, TSSA being detected only when ts68-3Y1 was cultivated at the permissive temperature. Immunoprecipitation showed that serum from a rabbit bearing an RSV-induced tumor detected a 60-kdalton protein in cell extracts from SR-3Y1 and NY8-3Y1. Antiserum to NY8-3Y1 failed to detect this protein. These results suggest that the tumor-specific surface antigen(s) on RSV-induced mammalian tumors was coded for by an RSV src gene that was not identical with the simple form of the 60-kdalton protein identified.
D000818:Animals; D000951:Antigens, Neoplasm / Q000032:analysis; D000954:Antigens, Surface / Q000032:analysis*; D001358:Avian Sarcoma Viruses / Q000235:genetics; D002471:Cell Transformation, Neoplastic; D002472:Cell Transformation, Viral; D003602:Cytotoxicity, Immunologic; D005347:Fibroblasts / Q000276:immunology; D005814:Genes, Viral; D006649:Histocompatibility Antigens / Q000032:analysis; D051379:Mice; D008807:Mice, Inbred BALB C; D009154:Mutation; D009368:Neoplasm Transplantation; D014176:Protein Biosynthesis; D051381:Rats; D001357:Sarcoma, Avian / Q000235:genetics / Q000276:immunology*; D014181:Transplantation Immunology
D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D006649:Histocompatibility Antigens