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Effect of Oxygen Supply on the Production of Interferon ${\alpha}$-1 by Recombinant Escherichia coli in Fed-batch Fermentation  

Yi, Jong-Ghil (Department of Biological Engineering and Center for Advanced Bioseparation Technology, Inha University)
Moon, Seok-Young (Department of Biological Engineering and Center for Advanced Bioseparation Technology, Inha University)
Kim, Young-Jun (Department of Biological Engineering and Center for Advanced Bioseparation Technology, Inha University)
Shin, Chul-Soo (Advanced Protein Technologies Corporation)
Koo, Yoon-Mo (Department of Biological Engineering and Center for Advanced Bioseparation Technology, Inha University)
Publication Information
Microbiology and Biotechnology Letters / v.35, no.3, 2007 , pp. 226-230 More about this Journal
Abstract
In order to achieve high-level expression of interferon-${\alpha}1$ (IFN-${\alpha}1$) during fed-batch fermentation of recombinant E. coli, effects of oxygen supply and induction temperature on the expression of recombinant proteins were evaluated. Supplementation of oxygen and its transfer into cells is one of the most important parameters involved in the design and operation of mixing-sparging equipment for bioreactors. Generally, higher oxygen supply stimulates cell growth of aerobic microorganism and consequently the amount of products is increased. In this study, the optimum aeration strategy for the higher production of IFN-${\alpha}1$ during fed-batch fermentation of recombinant E. coli was surveyed. The growth of the cells was also monitored with four different concentrations of dissolved oxygen (DO; limiting, 20%, 35%, 50%) conditions. The DO was controlled by varying aeration rates of air and pure oxygen. Oxygen uptake rate (OUR) and specific oxygen uptake rate (SOUR) were evaluated and compared for the enhanced growth and induction of the cells and IFN-${\alpha}1$, respectively. We confirmed that increased DO by additional oxygen supply, up to 35%, can improve the production of IFN-${\alpha}1$ during the fermentation.
Keywords
Fed-batch fermentation; oxygen uptake rate; specific oxygen uptake rates; interferon-${\alpha}1$;
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