title: MHC-unrestricted T-cell cytotoxicity against tumour cells.
abstract: F9 embryonal carcinoma cells (EC) grow as tumours in their strain of origin, 129/Sv, but can be rejected by mouse strains differing at the H-2 and/or non-H-2 loci. The presence of H-2 class I and/or minor H antigens on F9 and other EC cells is implied by (i) the rejection of EC cells by mice immunized with appropriate H-2 class I transfectants, and (ii) the ability of appropriate EC cells to prime mice for second-set in vivo skin-graft rejection responses to H-Y, and secondary MLC responses to multiple minor H antigens. However, EC cells express no H-2 class I antigens in vitro, and for in vivo rejection by T-cell responses directed either at allogeneic class I molecules or at minor H antigens restricted by self class I molecules, one would need to postulate that EC cells growing in vivo could express sufficient class I antigens for recognition by T cells. In the course of investigating this question, we found evidence for class I expression but also evidence for an additional antigen(s), shared by EC and tumour cells and recognized in a non-MHC-restricted manner.
authors.affiliation: MRC Clinical Research Centre, Harrow, Middlesex, U.K.
authors.forename: A M
authors.initials: AM
authors.lastname: Sponaas
authors.forename: B
authors.initials: B
authors.lastname: Loveland
authors.forename: E
authors.initials: E
authors.lastname: Simpson
mesh_terms: D000818:Animals; D000943:Antigens, Differentiation / Q000276:immunology; D000951:Antigens, Neoplasm / Q000276:immunology; D002460:Cell Line; D003602:Cytotoxicity, Immunologic; D006183:H-2 Antigens / Q000276:immunology*; D007114:Immunization; D008285:Major Histocompatibility Complex; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D008912:Minor Histocompatibility Loci; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D013724:Teratoma / Q000276:immunology; D014407:Tumor Cells, Cultured / Q000276:immunology*
chemical_list: D000943:Antigens, Differentiation; D000951:Antigens, Neoplasm; D006183:H-2 Antigens