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Mediators of Inflammation
Volume 2017 (2017), Article ID 8402405, 9 pages
Research Article

A Proinflammatory Effect of the β-Glucan from Pleurotus cornucopiae Mushroom on Macrophage Action

1Department of Applied Biological Chemistry, The Graduate School of Agriculture, Meijo University, Nagoya 468-8502, Japan
2Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan

Correspondence should be addressed to Ken-ichiro Minato;

Received 28 February 2017; Revised 17 April 2017; Accepted 19 April 2017; Published 22 May 2017

Academic Editor: Alex Kleinjan

Copyright © 2017 Ken-ichiro Minato et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


PCPS from P. citrinopileatus mushroom extract is a β-1,6-glucan possessing a proinflammatory effect on innate immune cells. The PCPS stimulated THP-1 macrophages to secrete significant levels of TNF. Moreover, the mRNA expressions of TNF and IL-1β were significantly enhanced by PCPS treatment. However, the PCPS did not induce to express both IL-12 and IL-10 mRNA in the macrophages. Next, the P. cornucopiae extract (containing mainly PCPS) treatment against mice showed significant increases in TNF and IL-1β mRNA expressions in the peritoneal macrophages of them. In this study, the expression levels of IFNγ mRNA in the spleen were almost the same between the extract- (PCPS-) treated group and control group. However, the expression of IL-4 mRNA showed a lower level in the extract-treated group than that in the control. Our results suggested that the PCPS could induce proinflammatory action in the immune response. In addition, the proinflammatory effect of the PCPS on THP-1 was enhanced by 5′-GMP-Na, while it was reduced by vitamin D2. These two compounds are majorly contained in the P. citrinopileatus mushroom. Therefore, these results suggested that the P. citrinopileatus mushroom might contain other immune regulative compounds, such as vitamin D2, as well as PCPS.