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International Journal of Medicinal Mushrooms
IF: 1.423 5-Year IF: 1.525 SJR: 0.433 SNIP: 0.661 CiteScore™: 1.38

ISSN Print: 1521-9437
ISSN Online: 1940-4344

International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushr.v14.i3.30
pages 257-269

Disruption of Actin Cytoskeleton Enhanced Cytokine Synthesis of Splenocytes Stimulated with Beta-Glucan from the Cauliflower Medicinal Mushroom, Sparassis crispa Wulf.:Fr. (Higher Basidiomycetes) in Vitro

Asami Shibata
Laboratory for Immunopharmacology of Microbial Products, School of Pharmacy, Tokyo University of Pharmacy & Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
Toshie H. Hida
Laboratory for Immunopharmacology of Microbial Products, School of Pharmacy, Tokyo University of Pharmacy & Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
Ken-Ichi Ishibashi
Laboratory for Immunopharmacology of Microbial Products, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
Noriko N. Miura
Laboratory for Immunopharmacology of Microbial Products, School of Pharmacy, Tokyo University of Pharmacy and Life Science, Tokyo, Japan
Yoshiyuki Adachi
Laboratory for Immunopharmacology of Microbial Products, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
Naohito Ohno
Laboratory for Immunopharmacology of Microbial Products, Tokyo University of Pharmacy and Life Science, Tokyo, Japan

ABSTRACT

Beta-glucan (BG) is a representative pathogen-associated molecular pattern (PAMP) produced by pathogenic fungi. SCG is a BG obtained from Sparassis crispa, which stimulates splenocytes in DBA/2 mice to produce cytokines, such as GM-CSF, IFN-γ, and TNF-α. In the present study, we analyzed the molecular mechanism of SCG-mediated cytokine synthesis using cytocharasin D (CytD), an inhibitor of actin polymerization. It was found that GM-CSF and TNF-α synthesis of splenocytes stimulated with SCG, but not with lipopolysaccharide, was significantly enhanced in the presence of CytD. CRDO, partially hydrolyzed linear 1,3-BG curdlan, stimulated splenocytes of DBA/2 mice slightly to produce cytokines. CRDO, acting as an antagonist in the presence of SCG, changed to a strong agonist in the presence of CytD. CytD also enhanced cytokine synthesis of bone marrow−derived dendritic cells. Taken together, cytokine productivity of BG was significantly dependent on molecular weight, and CytD treatment is useful to enhance the sensitivity for analyzing the immunostimulating activity of BG in vitro.


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