Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Factors Influencing the Production of Water-soluble Endopolysaccharides and Exopolysaccharides from Lentinus lepideus and their Effects on Immune Cytokine Production

  • Lee, Wi-Young (Division of Biotechnology, Korea Forest Research Institute) ;
  • Ahn, Jin-Kwon (Division of Biotechnology, Korea Forest Research Institute) ;
  • Kim, Dong-Hyun (School of Biological Science and Institute of Molecular Biology and Genetics, Seoul National University) ;
  • Ka, Kang-Hyeon (Division of Wood Chemistry and Microbiology, Korea Forest Research Institute)
  • Published : 2008.03.31
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Abstract

An efficient method to produce water-soluble polysaccharides from Lentinus lepideus is described. The productivity of both endopolysaccharides (PPS) and exopolysaccharides (EPS) was compared under various culture conditions. The effect of treating their own PPS and EPS on immune cytokine production was also studied in relation to culture factors. High yield production of EPS required a moderate culture temperature $(25^{\circ}C)$ as well as long culture period (16-20 days). In contrast, PPS production required a high culture temperature $(30^{\circ}C)$ and short culture period (8 days). Most of the carbon sources did not affect polysaccharides and mycelial production except for sucrose. Immune cytokine levels in the EPS treatment varied among carbon sources or culture periods. PPS did not appear to affect much on the production of cytokines, regardless of the culturing factors, except for the culture period. These results suggest that the optimal culture conditions for L. lepideus vary according to culture purposes, and different culture conditions should be used for different targets including mycelial biomass, EPS, and PPS. Whereas the immunomodulating activitiy of EPS appeared to be affected by culture conditions in L. lepideus, that of PPS did not.

Keywords

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