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Carbohydr Polym. 2016 Nov 5;152:648-657. doi: 10.1016/j.carbpol.2016.07.064. Epub 2016 Jul 18.

Structure elucidation, proliferation effect on macrophage and its mechanism of a new heteropolysaccharide from Lactarius deliciosus Gray.

Author information

1
Key Laboratory of Southwest China Wildlife Resources Conservation, College of Life Sciences, China West Normal University, 1# Shida Road, Nanchong, Sichuan Province 637009, China.
2
Key Laboratory of Southwest China Wildlife Resources Conservation, College of Life Sciences, China West Normal University, 1# Shida Road, Nanchong, Sichuan Province 637009, China; College of Environmental Science and Engineering, China West Normal University, 1# Shida Road, Nanchong, Sichuan Province 637009, China. Electronic address: biostart8083@126.com.

Abstract

A new heteropolysaccharide was isolated from the fruiting bodies of Lactarius deliciosus Gray which had a molecular weight of 16kDa and was mainly composed of the galactose and glucose. Structural elucidation results indicated that Lactarius deliciosus Gray polysaccharide (LDG-B) had a backbone of (1,6)-linked d-galactose and (1, 2, 6)-linked d-galactose which branches were mainly composed of 4-linked d-glucose and 6-linked d-galactose residue. Cell cycle test results showed that LDG-B could promote the proliferation of B cells and macrophage cells by affecting G0/G1 phase, S phases and G2/M phases. The analysis of transcriptomes sequence of macrophages showed a total of 1839 genes were identified as DEGs, and approximately 708 genes were up-regulated, whereas 1131 genes were down-regulated in LDG-B group. KEGG pathway enrichment analysis showed that the MAPK, JAK-STAT and NF-κB signaling pathways are significantly enriched for DEGs in LDG-B group. Analysis of transcriptome resources enabled us to examine gene expression profiles, verify differential gene expression, and select candidate signaling pathways as the mechanisms of the immunomodulatory activity of LDG-B.

KEYWORDS:

Immunomodulatory activity; Macrophage; Polysaccharide; RNA-seq; Structure

PMID:
27516315
DOI:
10.1016/j.carbpol.2016.07.064
[Indexed for MEDLINE]

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