Structures and immunomodulatory activity of one galactose- and arabinose-rich polysaccharide from Sambucus adnata

One galactose- and arabinose-rich polysaccharide isolated from Sambucus adnata was named SPS-1, which had an average molecular weight 138.52 kDa, and was composed of L-rhamnose, D-glucuronic acid, D-galacturonic acid, D-galactose, and L-arabinose in a molar ratio of 0.6:0.4:0.1:4.9:4.0. The primary...

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Veröffentlicht in:International journal of biological macromolecules 2022-05, Vol.207, p.730-740
Hauptverfasser: Yuan, Lei, Zhong, Zheng-Chang, Liu, Yu, Quan, Hong, Lu, Ya-Zhou, Zhang, Er-Hao, Cai, Hao, Li, Lian-Qiang, Lan, Xiao-Zhong
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Sprache:eng
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Zusammenfassung:One galactose- and arabinose-rich polysaccharide isolated from Sambucus adnata was named SPS-1, which had an average molecular weight 138.52 kDa, and was composed of L-rhamnose, D-glucuronic acid, D-galacturonic acid, D-galactose, and L-arabinose in a molar ratio of 0.6:0.4:0.1:4.9:4.0. The primary structure of SPS-1 was further analyzed through methylation and NMR spectroscopy. The results showed that SPS-1 had the structural characteristics of AG-II pectin. The immunoactivity test showed that SPS-1 activated the phosphorylation of MAPKs-related proteins and further elevated the expression levels of related nuclear transcription factors (IκBα and NF-κB p65) in the cells through the TLR2 and MyD88/TRAF6-dependent pathway, thereby significantly enhancing the phagocytosis of macrophages and stimulating the secretion of NO, IL-1β, IL-6, and TNF-α, which activated the RAW264.7 cells. Therefore, SPS-1, acting as an immunomodulator, is a potential drug for immunological diseases. •One galactose- and arabinose-rich polysaccharide was isolated.•The structure characterizations of SPS-1 were analyzed.•SPS-1 increased phagocytosis and secretion of NO, IL-1β, TNF-α and IL-6.•SPS-1 activated macrophages through MAPKs, NF-κB via TLR2 receptor.
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2022.03.132