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  • Title: Towards an idiotype vaccine against mammary tumors. Induction of an immune response to breast cancer-associated antigens by anti-idiotypic antibodies.
    Author: Smorodinsky NI, Ghendler Y, Bakimer R, Chaitchuk S, Keydar I, Shoenfeld Y.
    Journal: Eur J Immunol; 1988 Nov; 18(11):1713-8. PubMed ID: 2849550.
    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.
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