The polysaccharide from Aralia continentalis Kitagawa enhances immune responses via activating the MAPKs and NF-κB signaling pathways in RAW 264.7 macrophages

被引:0
作者
Wang, Xi [1 ,2 ]
Liu, Liyang [2 ]
Zhang, Xu [3 ]
Xie, Di [1 ]
Hu, Hewen [1 ]
Wang, Siqi [3 ]
Wang, Dawei [1 ]
Wang, Tianyu [2 ]
机构
[1] Jilin Agr Univ, Coll Food Sci & Engn, Changchun 130018, Peoples R China
[2] Changchun Univ, Coll Food Sci & Engn, Changchun 130024, Peoples R China
[3] Jilin Prov Prod Qual Supervis & Inspect Inst, Changchun 130012, Peoples R China
关键词
Aralia continentalis Kitagawa; Polysaccharide; Macrophage; Immunomodulatory activity; Molecular mechanisms; MAPKs; NF-kappa B; STRUCTURAL-CHARACTERIZATION; IMMUNOMODULATORY ACTIVITY; DEGRADATION; METASTASIS; EXTRACT;
D O I
10.1186/s40538-024-00649-y
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
Background Polysaccharides derived from Aralia continentalis Kitagawa possess excellent biological properties, such as anti-tumor, antioxidant, antibacterial, lipid-lowering, and anti-inflammatory. However, the immunomodulatory effects of these polysaccharides on macrophages and their underlying mechanisms remain largely unexplored due to their complex molecular structure. Results The study isolated and characterized a pure polysaccharide, namely WACP(S)-A3-b from Aralia continentalis Kitagawa to investigate its impact on RAW 264.7 cell activation. The structural analysis of WACP(S)-A3-b revealed an average molecular weight of 40.1 kDa with a pectin-like structure composed of HG and RG-I domains, primarily composed of galacturonic acid, rhamnose, galactose, fucose, and arabinose at molar ratios of 55.56: 19.60: 10.29: 7.85: 6.69; NMR found that WACP(S)-A3-b contains alpha-1,4-GalpA, alpha-1,2-Rhap, alpha-1,2,4-Rhap, and t-alpha-GalpA. Further results demonstrated that the immunomodulatory activity of WACP(S)-A3-b could enhance the production of nitric oxide (NO), interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-alpha), and promote the expression of interleukin-1beta (IL-1 beta). Additionally, WACP(S)-A3-b could activate MAPKs and NF-kappa B signaling pathways, thereby enhancing the ability of RAW 264.7 macrophages to release cytokines. Conclusions The study isolated and purified the Aralia continentalis Kitagawa stem polysaccharide, clarified the basic structure of the polysaccharide, and explored the mechanism of immune activity, which provided a theoretical basis for the structure-activity relationship of the polysaccharide.
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页数:12
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