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Enhanced Production of hCTLA4Ig by Adding Sodium Butyrate and Sodium Pyruvate
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  • Journal title : KSBB Journal
  • Volume 26, Issue 5,  2011, pp.386-392
  • Publisher : Korean Society for Biotechnology and Bioengineering
  • DOI : 10.7841/ksbbj.2011.26.5.386
 Title & Authors
Enhanced Production of hCTLA4Ig by Adding Sodium Butyrate and Sodium Pyruvate
Yoo, Mi-Hee; Kim, Soo-Jin; Kwon, Jun-Young; Nam, Hyung-Jin; Kim, Dong-Il;
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Human cytotoxic T-lymphocyte antigen 4-immunoglobulin (hCTLA4Ig), an immunosuppressive agent, was expressed in transgenic rice cells using RAmy3D promoter and RAmy1A signal peptide for the inducible production and secretion into culture media by sugar depletion. In this study, sodium butyrate was used as a small molecular enhancer (SME) to enhance the production of hCTLA4Ig in transgenic rice cell suspension cultures. When 1 mM sodium butyrate was added in sugar-free media, relative viability was not reduced, while the productivity was improved 1.3-fold. In addition, by supplementing 87 mM sodium pyruvate as an alternative energy source during the production phase, death rate of the cells was decreased. When sodium pyruvate was not added, most cells became dead at day 6. However, by adding sodium pyruvate, 18% of viability can be maintained until day 10 and the production of hCTLA4Ig was enhanced 1.4-fold. When the combination of sodium pyruvate and sodium butyrate at optimum concentrations was added, the highest viability and hCTLA4Ig production could be obtained. The highest level of hCTLA4Ig reached up to 35 mg/L at day 10.
transgenic plant cell culture;hCTLA4Ig;sodium butyrate;RAmy3D promoter;small molecular enhancer;
 Cited by
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