CN: 32-1845/R
ISSN: 2095-6975
CUI Hai-Yan, WANG Chang-Lu, WANG Yu-Rong, LI Zhen-Jing, ZHANG Ya-Nan. The polysaccharide isolated from Pleurotus nebrodensis (PN-S) shows immune-stimulating activity in RAW264.7 macrophages[J]. 中国天然药物英文, 2015, 13(5): 355-360

The polysaccharide isolated from Pleurotus nebrodensis (PN-S) shows immune-stimulating activity in RAW264.7 macrophages

CUI Hai-Yan, WANG Chang-Lu, WANG Yu-Rong, LI Zhen-Jing, ZHANG Ya-Nan
Key Laboratory of Food Nutrition and Safety, Ministry of Education, School of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
A novel Pleurotus nebrodensis polysaccharide (PN-S) was purified andcharacterized, and its immune-stimulating activity was evaluated in RAW264.7 macrophages. PN-S induced the proliferation of RAW264.7 cells in a dose-dependent manner, as determined by the MTT assay. After exposure to PN-S, the phagocytosis of the macrophages was significantly improved, with remarkable changes in morphology being observed. Flow cytometric analysis demonstrated that PN-S promoted RAW264.7 cells to progress through S and G2/M phases. PN-S treatment enhanced the productions of interleukin-6 (IL-6), nitric oxide (NO), interferon gamma (INF-γ), and tumor necrosis factor-α (TNF-α) in the macrophages, with up-regulation of mRNA expressions of interleukin-6 (IL-6), inducible nitric oxide synthase (iNOS), interferon gamma(INF-γ) and tumor necrosis factor-α (TNF-α) being observed in a dose-dependent manner, as measured by qRT-PCR. In conclusion, these results suggest that the purified PN-S can improve immunity by activating macrophages.
关键词:    Pleurotus nebrodensis    Polysaccharide    Immunization    Cytokines   
收稿日期: 2014-04-02
WANG Chang-Lu
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