期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 129, 期 -, 页码 904-915出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2019.02.088
关键词
Polysaccharide; Modification; PM2.5; NR8383 cells; Inflammation
资金
- National Natural Science Foundation of China [21301165]
- Educational Commission of Anhui Province of China [KJ2017A023]
- Doctoral Scientific Research Foundation of Anhui University
Fine particulate matter (PM2.5) exposure could cause many acute and chronic respiratory diseases. In this study the protective effects of polysaccharide from Morchella esculenta (FMP-1) and its derivatives against PM2.5-induced inflammation were evaluated. By flow cytometry and ELISA analysis, sulfated polysaccharide SFMP-1 showed the best protective effect in reducing PM2.5-induced cell death, cell apoptosis and production of tumor necrosis factor-alpha (TNF-alpha) and interleukin-1 beta (IL-1 beta), which was accompanied by a diminished level in reactive oxygen species (ROS) formation caused by PM2.5 in rat alveolar macrophage NR8383 cells. Furthermore, the mechanism was studied by immunofluorescence, qRT-PCR and western blotting. SFMP-1 could down regulate the expression of inducible NO synthesis (iNOS) and cyclooxygenase-2 (COX-2) at both mRNA and protein levels in PM2.5-treated cells. The PM2.5-induced phosphorylation of nuclear factor-kappa B (NF-kappa B) was also reduced through suppressing nuclear translation of the NF-kappa B and inhibiting the degradation and phosphorylation of I kappa B alpha. These results indicated that SFMP-1 could protect NR8383 cells from PM2.5-induced inflammation by inhibiting NF-kappa B activation. (C) 2019 Elsevier B.V. All rights reserved.
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