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International Journal of Medicinal Mushrooms
Factor de Impacto: 1.423 Factor de Impacto de 5 años: 1.525 SJR: 0.433 SNIP: 0.661 CiteScore™: 1.38

ISSN Imprimir: 1521-9437
ISSN En Línea: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.v18.i11.30
pages 977-989

A Polysaccharide from the Culinary-Medicinal Mushroom Pholiota nameko (Agaricomycetes) Inhibits the NF-κB Pathway in Dendritic Cells Through the TLR2 Receptor

Haiping Li
Tianjin Key Laboratory of Food Biotechnology, Faculty of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, P. R. China
Pei Zhao
Tianjin Key Laboratory of Food Biotechnology, Faculty of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, P. R. China
Fengling Wang
Tianjin Key Laboratory of Food Biotechnology, Faculty of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, P. R. China
Lihua Huai
Tianjin Key Laboratory of Food Biotechnology, Faculty of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, P. R. China
Ruixuan Zhu
Tianjin Key Laboratory of Food Biotechnology, Faculty of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, P. R. China
Guoliang Li
Tianjin Key Laboratory of Food Biotechnology, Faculty of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, P. R. China
Yufeng Xu
Tianjin Key Laboratory of Food Biotechnology, Faculty of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, P. R. China

SINOPSIS

A polysaccharide purified from Pholiota nameko (PNPS-1) was found to have anticancer and anti-inflammatory activity. This study investigated the effect of PNPS-1 on the nuclear factor (NF)-κB signaling pathway of TLR2 small interfering RNA−silenced murine bone marrow-derived dendritic cells (BMDCs) and relevant mechanisms. The expression of messenger RNA of 4 NF-κB-related genes, including MyD88, IKBKB, RelA(p65), and CCL2, was determined by real-time polymerase chain reaction; the expression of the phenotype molecule intercellular adhesion molecule-1 (ICAM-1) by flow cytometry; the protein expression of IKKβ and p65 by Western blot; the production of p65 by enzyme-linked immunosorbent assay; and the expression of p65 by immunocytochemistry. The results showed that TLR2-specific small interfering RNA could effectively inhibit the decrease in the expression of MyD88, IKBKB, CCL2, p65, and ICAM-1 in BMDCs induced by PNPS-1, and thus the transcription inactivation of NF-κB, which obviously suggests that PNPS-1 could downregulate the NF-κB signaling pathway via the TLR2 receptor.


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