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A protein-free medium for the growth of hybridomas and other cells of the immune system

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Summary

A protein-free medium, termed ABC, has been developed which essentially eliminates the need for serum proteins. ABC supports the long-term growth of murine hybridomas as well as other transformed cells of the immune system. The requirement of hybridoma growth for transferrin has been met by substituting the soluble organo-iron compound, sodium nitroprusside. Substantial improvement in the growth of hybridomas was afforded by the inclusion of 18 trace elements complexed to disodium ethylene diaminetetraacetate (EDTA). The medium was further improved by the inclusion of components not found in Ham's F12 medium or by raising the concentrations of existing low molecular weight components. Murine hybridomas can be cultured routinely in this protein-free medium in an anchorage-independent manner with doubling times generally under 24 h. Visualized on electrophoretic gels, levels of monoclonal antibody taken from those cultures often exceeded 80% of the total protein. The medium was also able to support the growth of HuT 78 and H9 cells as well as certain other transformed cells of the immune system. In addition, normal human peripheral blood lymphocytes, activated with phytohemagglutinin and cultured with 50 U/ml recombinant interleukin 2, could be grown for 2 wk with a 50-fold expansion over input cell number.

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Darfler, F.J. A protein-free medium for the growth of hybridomas and other cells of the immune system. In Vitro Cell Dev Biol 26, 769–778 (1990). https://doi.org/10.1007/BF02623618

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