title: Towards an idiotype vaccine against mammary tumors. Induction of an immune response to breast cancer-associated antigens by anti-idiotypic antibodies.
abstract: Previously we have reported on the production of two sets of human monoclonal antibodies reacting with mouse mammary tumor virus (MMTV) and human mammary tumor virus (HuMTV) cross-reacting antigens. B11 is a monoclonal IgG generated by the human-human hybridoma technique using axillary lymph node of breast cancer patients. 4.6/6 is a monoclonal IgG established by the mouse-human hybridoma procedure using peripheral blood lymphocytes of a healthy investigator working with the breast cancer cell line T47D which secretes HuMTV antigens. Two anti-idiotypic (Id) antibodies were produced by immunizing rabbits with B11 or 4.6/6. Following exhaustive adsorption on unrelated human-Ig, fetal calf serum and purification on B11 or 4.6/6 affinity columns, the anti-Id antibodies were shown to react specifically with their respective Id. The binding of these anti-Id antibodies to the respective Id was specifically inhibited by prior incubation of the Id with MMTV and/or HuMTV antigens. Rabbit anti-B11 and rabbit anti-4.6/6 anti-Id antibodies were employed to immunize female C3Heb mice. Following immunizations, humoral and cellular immune responses to MMTV-related antigens could be demonstrated. The sera of the mice contained anti-MMTV antibodies and delayed-type hypersensitivity was specifically expressed when irradiated cells of the Mm5MT line (which carry surface MMTV antigens) were injected. Our results support the notion that anti-Id antibodies harboring the internal image can immunize animals against tumor cells bearing on their surface viral-associated antigens.
authors.affiliation: Department of Microbiology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel.
authors.forename: N I
authors.initials: NI
authors.lastname: Smorodinsky
authors.forename: Y
authors.initials: Y
authors.lastname: Ghendler
authors.forename: R
authors.initials: R
authors.lastname: Bakimer
authors.forename: S
authors.initials: S
authors.lastname: Chaitchuk
authors.forename: I
authors.initials: I
authors.lastname: Keydar
authors.forename: Y
authors.initials: Y
authors.lastname: Shoenfeld
mesh_terms: D000818:Animals; D000888:Antibodies, Anti-Idiotypic / Q000276:immunology*; D000911:Antibodies, Monoclonal / Q000276:immunology; D000918:Antibody Specificity; D000937:Antigen-Antibody Reactions; D000951:Antigens, Neoplasm / Q000276:immunology*; D001666:Binding Sites, Antibody; D001943:Breast Neoplasms / Q000276:immunology*; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007111:Immunity, Cellular; D007130:Immunoglobulin Idiotypes / Q000276:immunology*; D008325:Mammary Neoplasms, Experimental / Q000276:immunology; D008324:Mammary Tumor Virus, Mouse / Q000276:immunology*; D051379:Mice; D008968:Molecular Conformation; D011817:Rabbits; D014407:Tumor Cells, Cultured; D014612:Vaccines
chemical_list: D000888:Antibodies, Anti-Idiotypic; D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D007130:Immunoglobulin Idiotypes; D014612:Vaccines