title: Minor histocompatibility antigen-dependent rejection of Pam 212 epidermoid carcinoma by DBA/2 mice.
abstract: Since Pam 212 cells express low levels of class I major histocompatibility (MHC) antigens, we tested their ability to present alloantigens or minor histocompatibility (mH)/minor lymphocyte stimulatory (mls) antigens in disparate hosts. After subcutaneous injection, Pam 212 cells grew progressive tumors in normal BALB/c mice but were rejected rapidly by naive C3H mice (3 weeks) and slowly by DBA/2 mice (8 weeks). Pam 212 cells (high or low class I MHC expression) induced a strong primary MLR in DBA/2 T cells, but a weak BALB/c T-cell response. In contrast, splenic APC (BALB/c) did not induce an MLR, suggesting that Pam 212 cells represented mH antigens to naive DBA/2 T cells. This MLR was blocked by anti-TCR alpha/beta, anti-class II, and anti-CD4 monoclonal antibodies, but was independent of ICAM-1 and B7. Repeated immunization using IFN-gamma-treated Pam 212 cells induced anti-Pam 212 CTL in DBA/2 mice but not in BALB/c mice. DBA/2 T-cell responses did not appear to be mls (MMTV superantigen)-specific, because Pam 212 cells did not express MMTV mRNA detectable by RT-PCR. Pam 212 cells presented non-lymphoid-associated mH antigens that served as potent stimuli for tumor rejection in mH/mls-disparate hosts, which is similar to tumor rejection mediated by MHC alloantigens.
authors.affiliation: Department of Dermatology, University of Rochester, School of Medicine and Dentistry, New York 14642, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Chen
authors.forename: J E
authors.initials: JE
authors.lastname: Knepper
authors.forename: A A
authors.initials: AA
authors.lastname: Gaspari
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D018122:B7-1 Antigen / Q000096:biosynthesis; D001483:Base Sequence; D001667:Binding, Competitive; D005260:Female; D006084:Graft Rejection / Q000276:immunology; D006968:Hypersensitivity, Delayed / Q000276:immunology; D018799:Intercellular Adhesion Molecule-1 / Q000096:biosynthesis; D007959:Lymphocyte Culture Test, Mixed; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008811:Mice, Inbred DBA; D015778:Minor Histocompatibility Antigens / Q000276:immunology*; D008969:Molecular Sequence Data; D009368:Neoplasm Transplantation / Q000276:immunology*; D014407:Tumor Cells, Cultured
chemical_list: D000911:Antibodies, Monoclonal; D018122:B7-1 Antigen; D015778:Minor Histocompatibility Antigens; D018799:Intercellular Adhesion Molecule-1