Performance of a membrane-dialysis bioreactor with a radial-flow fixed bed for the cultivation of a hybridoma cell line |
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Authors: | A Bohmann R Pörtner H Märkl |
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Institution: | 1. Institute of Applied Biochemistry, University of Tsukuba, Tennodai 1-1-1, 305, Tsukuba, Ibaraki, Japan 2. Technische Universit?t Hamburg-Harburg, Bioproze\- und Bioverfahrenstechnik, Denickestr. 15, D-21071, Hamburg, Germany
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Abstract: | A bioreactor system for the continuous cultivation of animal cells with a high potential for scale-up is presented. This reactor
system consists of radial-flow fixed-bed units coupled with a dialysis module. The dialysis membrane enables the supply of
low-molecular-weight nutrients and removal of toxic metabolites, while high-molecular-weight nutrients and products (e.g.
monoclonal antibodies) are retained and accumulated. This concept was investigated on the laboratory scale in a bioreactor
with an integrated dialysis membrane. The efficiency of the reactor system and the reproducibility of the cell activity (hybridoma
cells) under certain process conditions could be demonstrated in fermentations up to 77 days. Based on model calculations,
an optimized fermentation strategy was formulated and experimentally confirmed. Compared to chemostat cultures with suspended
cells, a ten-times higher mAb concentration (383 mgl−1) could be obtained. The highest volumetric specific mAb production rate determined was 6.1 mg mAb (1 fixed bed)−1 h−1. |
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