Abstract
KB-26.5, a murine hybridoma cell line producing an IgG3 monoclonal antibody used in blood type determination, primarily adapted to grow at 5% foetal calf serum (FCS) concentration has been adapted to grow at 0.5% FCS, maintaining its ability to produce antibodies at the same level. In the final step of adaptation, the addition of insulin, transferrin, ethanolamine and selenium to the media formulation was studied, using factorial assay techniques to check the effect of the different compounds and to optimize their required level for satisfactory growth and antibody secretion. KB-26.5 cells required only 20 μg/ml of transferrin to adapt to 0.5% FCS medium. Furthermore, transferrin could be substituted by FeCl3, at a relatively low level of 2 μg/ml. Maximum cell density decreased by 31.5% in spinner flask test, but the antibody titer was maintained, thus the specific productivity increased. However, inoculum size had to be increased three-fold with 0.5% FCS medium in order to assure cell growth.
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Damgaard, B., Sanfeliu, A., Cairó, J.J. et al. Substitution of transferrin by FeCl3 in the development of a low foetal calf serum concentration medium for KB-26.5 hybridoma cell line. Cytotechnology 13, 133–141 (1993). https://doi.org/10.1007/BF00749940
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DOI: https://doi.org/10.1007/BF00749940