Abstract
Monoclonal antibody production by hybridoma cells at moderately slowed growth states would be favorable for commercial scale production since cells can devote their resources to performing the differentiated function, immunoglobulin production. We found that a purified recombinant human interleukin-6, which had been reported to support or stimulate proliferation of B cell hybridoma/plasmacytoma cells, suppressed growth of a hybridoma cell line in serum-free medium. In the presence of the interleukin, the growth-suppressed cells were viable for remarkably long periods in batch culture, and after removal of the interleukin from the culture medium, they started to proliferate at their normal growth rate. As the concentration of the interleukin increased in the culture, the growth rate decreased and the specific antibody productivity (antibody production rate per cell) increased to 5-fold of control at 10 U ml−1 (2 ng ml−1) of the interleukin.
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Abbreviations
- IL-1,2, and 6:
-
interleukin-1, 2 and 6
- rhIL-6:
-
recombinant human interleukin-6
- MCAb:
-
monoclonal antibody
- TNP:
-
trinitrophenyl
- unit (U) of interleukin-6:
-
A unit (U) is equivalent to the amounts of IL-6 which gives one-half maximal IgM secretion by SKW6-CL4 cells (1U ml−1=200 pg ml−1)
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Makishima, F., Terada, S., Mikami, T. et al. Interleukin-6 is antiproliferative to a mouse hybridoma cell line and promotive for its antibody productivity. Cytotechnology 10, 15–23 (1992). https://doi.org/10.1007/BF00376096
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DOI: https://doi.org/10.1007/BF00376096