BaF2 windows to study effects of non thermal plasma treatment on the polysaccharide

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Effects of non-thermal plasma treatment on the polysaccharide from Dendrobium nobile Lindl. And its immune activities in vitro
Yijun Fan 1, Qingsong Yu 2, Gang Wang 3, Jingwen Tan 4, Sha Liu 5, Shangrao Pu 1, Wenchuan Chen 6, Peng Xie 6, Yixin Zhang 6, Jiao Zhang 1, Yixuan Liao 4, Aoxue Luo 7
https://pubmed.ncbi.nlm.nih.gov/31758...
In order to improve the hydrophilicity and immune activity of the polysaccharide from Dendrobium nobile Lindl., non-thermal plasma was used to treat the polysaccharide. It was found that the hydrophilicity of the polysaccharide plasma-treated was significantly enhanced. Infrared spectra showed that the content of OH in the molecule increased significantly, and the monosaccharide ring changed from β-pyran sugar to β-furan sugar. The detection of SEM, AFM and TEM showed that the degree of cross-linking of surface molecules increased, and the arrangement of the polysaccharide was more compact and orderly. In vitro cell tests showed that the polysaccharide plasma-treated significantly improve the phagocytosis ability of RAW264.7, and promote the secretion of cytokines TNF-α, IL-6, IL-1. However, the cell proliferation test indicated that the polysaccharide did not increase the concentration of cytokines by promoting cell proliferation. RT-PCR showed that the polysaccharide plasma-treated could promote the expression of IL-1β at the transcriptional level. These results showed that non-thermal plasma treatment can effectively enhance the hydrophilicity of the polysaccharide and enhance its immune activity in vitro. Therefore, it can be inferred that the non-thermal plasma technology can be applied to the modification of active polysaccharides and will promote active polysaccharides to work better.
Keywords: Dendrobium nobile Lindl.; Immune activity; Micro-Morphology; Non-thermal plasma; Polysaccharide.

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MeSH terms
Cell Proliferation / drug effects
Cytokines / genetics
Cytokines / metabolism
Dendrobium / chemistry*
Gene Expression Regulation / drug effects
Gene Expression Regulation / immunology
Immunologic Factors / chemistry*
Immunologic Factors / pharmacology*
Macrophages / cytology
Macrophages / drug effects
Macrophages / metabolism
Plasma Gases / chemistry*
Polysaccharides / chemistry*
Polysaccharides / pharmacology*
Substances
Cytokines
Immunologic Factors
Plasma Gases
Polysaccharides