Animals bearing malignant grafts reject normal grafts that express through gene transfer the same antigen

• Published in: The Journal of experimental medicine Vol. 171; no. 4; pp. 1205 - 1220
• Main Authors: PERDRIZET, G. A, ROSS, S. R, STAUSS, H. J, SINGH, S, KOEPPEN, H, SCHREIBER, H
• Format: Journal Article
• Language: English
• Published: New York, NY Rockefeller University Press 01.04.1990; The Rockefeller University Press
• Subjects: Animals; Biological and medical sciences; Fundamental and applied biological sciences. Psychology; Fundamental immunology; Graft Rejection - genetics; Graft Rejection - immunology; Histocompatibility Antigens Class I - genetics; Major Histocompatibility Complex; Mice; Mice, Inbred BALB C; Mice, Inbred C3H; Mice, Inbred C57BL; Mice, Transgenic; Neoplasm Transplantation; Skin Neoplasms - genetics; Skin Neoplasms - immunology; Skin Transplantation - immunology; Tissue, organ and graft immunology; Transfection; Flow cytometry; Immune response; Rodentia; Transgenic animal; Cytotoxicity; Host; Rejection; Vertebrata; Mammalia; Transfection; Mouse; Graft; Tumor; Class I histocompatibility antigen; Tumor cell
• ISSN: 0022-1007; 1540-9538
• DOI: 10.1084/jem.171.4.1205

Breaking the state of immunological unresponsiveness of tumor-bearing individuals to cancer is a prerequisite for active or passive tumor-specific immunotherapy. To study this problem the immunogenic MHC class I antigen, K216 was transfected into a progressor tumor. The transfected tumors were regularly rejected by normal mice but grew progressively in mice bearing nontransfected tumors. In addition, transgenic mice were derived to obtain normal cells and tissues expressing the same K216 gene product. Normal mice rejected K216-positive normal or malignant tissue grafts and generated K216-specific CTL in vitro and in vivo in response to these challenges. In contrast, mice bearing nontransfected tumors, though rejecting K216-positive nonmalignant tissue grafts, did not reject K216-positive tumors nor generate K216-specific CTL in response to K216-positive tumor cells. Mice bearing K216-positive tumors also rejected the nonmalignant K216-positive tissue grafts, but this in vivo response failed to lead to rejection of the simultaneously present tumor graft expressing the same antigen; in fact, immunity had no measurable effect whatsoever on tumor size or incidence and caused no selection for antigen loss variants. Taken together, the present findings suggest that transfer of expression of a target antigen into nonmalignant cells provides a way for obtaining effective stimulation of antigen-specific CTL in tumor-bearing mice, but that additional manipulations will be required to cause immunological rejection of established tumors.