Effect of Serum Concentration on Hybridoma Cell Growth and Monoclonal Antibody Production at Various Initial Cell Densities

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Abstract
Hybridoma cells (S3H5/γ2bA2) were cultivated using RPMI 1640 media with different serum concentrations at various initial cell densities. It was found that the serum requirement for cell growth was population-dependent. At an initial cell density of 1-104 cells/ml, the minimum serum concentration for cell growth was 5 %(v/v) and reduced to 1 % at the initial cell density of 1-105 cells/ml. When the initial density was increased to 1-106 cells/ml, serum was not needed for cell growth. The maximum cell density and the integral of viable cells over cultivation time increased as serum concentration or initial cell density was increased. However, specific antibody production rate was almost constant at 0.16 pg/cell-hr irrespective of serum concentration or initial cell density.