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  • Title: Development of human-human hybridoma from anti-Her-2 peptide-producing B cells in immunized NOG mouse.
    Author: Kametani Y, Shiina M, Katano I, Ito R, Ando K, Toyama K, Tsukamoto H, Matsumura T, Saito Y, Ishikawa D, Taki T, Ito M, Imai K, Tokuda Y, Kato S, Tamaoki N, Habu S.
    Journal: Exp Hematol; 2006 Sep; 34(9):1240-8. PubMed ID: 16939817.
    Abstract:
    OBJECTIVE: Numerous monoclonal antibodies have been developed for the purpose of medical treatments, including cancer treatment. For clinical application, the most useful are human-derived antibodies. In this study, we tried to prepare designed antigen-specific antibodies of completely human origin using immunodeficient mouse. METHODS: Nonobese diabetic/severe combined immunodeficient/IL-2 receptor gamma null mouse (NOG) mouse was used to reconstitute the human immune system with umbilical cord blood hematopoietic stem cells (CB-NOG mouse) and to prepare human-derived Her-2-epitope-specific antibodies. Hybridoma lines were prepared by fusing the human myeloma cell line Karpas707H. RESULTS: Serum of immunized NOG mouse contained human-derived immunoglobulin M (IgM) antibodies specific for a short peptide sequence of 20 amino acids, including the epitope peptide of apoptotic Her-2 antibody CH401. Hybridoma lines were successfully prepared with spleen B cells obtained from the immunized CB-NOG mouse. One of these cell lines produced human IgM against the epitope peptide that can recognize surface Her-2 molecule. CONCLUSION: We could produce human-derived IgM antibody against Her-2 epitope peptide in CB-NOG mouse, succeeding in generation of human hybridoma-secreting IgM against a given peptide.
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