title: Characterization of mouse-human hybridoma as a useful fusion partner for the establishment of mouse-human-human hybridoma secreting anti-tetanus toxoid human monoclonal antibody of IgM or IgG class.
abstract: We succeeded in establishing a mouse-human (M-H) heterohybridoma clone which provides parental cells useful for human monoclonal antibody (hMoAb) production. Electron micrographs show that the M-H hybridoma cells retain characteristics of murine origin with regard to chromatin patterns, small granules, granular endoplasmic reticulum and Golgi apparatus. The human DNA incorporated into the M-H hybridoma is estimated to be about 1% of the total human chromosomal DNA. Mouse-human-human (M-H-H) hybridomas obtained by hybridization of the M-H hybridoma cells with Epstein-Barr virus(EBV)-transfected human B cells secrete immunoglobulin (Ig) in amounts comparable to those of murine hybridomas. Also the M-H-H hybridomas grow in nude mice and are capable of producing ascites containing large quantities of Ig. The Ig class switching takes place in the M-H-H hybridomas at a much higher frequency than in the original EBV transformant and the M-H hybridoma. Cells secreting specific monoclonal antibody of different Ig classes could be separated and concentrated by the use of fluorescence activated cell sorter (FACS).
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis*; D002460:Cell Line; D002469:Cell Separation; D004247:DNA / Q000032:analysis; D005434:Flow Cytometry; D006801:Humans; D006825:Hybridomas / Q000032:analysis / Q000276:immunology* / Q000648:ultrastructure; D007074:Immunoglobulin G / Q000096:biosynthesis; D007075:Immunoglobulin M / Q000096:biosynthesis; D007136:Immunoglobulins / Q000096:biosynthesis*; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D008854:Microscopy, Electron; D009693:Nucleic Acid Hybridization; D013745:Tetanus Toxoid / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007136:Immunoglobulins; D013745:Tetanus Toxoid; D004247:DNA