4.7 Article

The linear structure of β-glucan from baker's yeast and its activation of macrophage-like RAW264.7 cells

期刊

CARBOHYDRATE POLYMERS
卷 148, 期 -, 页码 61-68

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.04.044

关键词

Yeast beta-glucan; Chemical structure; Receptor; Interaction; Activation of microphage-like cells

资金

  1. National Natural Science Foundation [21274114, 21574102, 20874078, 21334005]
  2. New Century Excellent Talents Program of Education Ministry [NCET-13-0442]
  3. Yellow Crane Talent Program of Wuhan City
  4. Innovative Talents Program of Wuhan University [2042014kf0216]
  5. Fundamental Research Funds for the Central Universities [2015203020205]

向作者/读者索取更多资源

Yeast beta-glucan has many formulations with different chemical structures, water solubility and purity. In particular, the purity of beta- glucan in these formulations is variable and relatively low, contributing to different data on its biological activity. In this study, the major polysaccharide component in the crude Baker's yeast polysaccharides coded as BBG with high purity of 99% was obtained, and its chemical structure was determined to be a linear beta-(1,3)-glucan. It was found that BBG interacted with complement receptor 3 (CR3) and toll-like receptor 2 (TLR2) on the surface of macrophage-like RAW264.7 cells, and initiated activation of RAW264.7 cells characterized by significant production of tumor necrosis factor-alpha. (TNF-alpha) and monocyte chemoattractant protein 1 (MCP-1). Additionally, activation of the nuclear factor kappaB p65 (NF-kappa B p65), c-Jun N-terminal kinase (JNK) and extracellular signal-regulated kinase (ERK) induced by BBG, were also observed, further confirming the stimulation of RAW264.7 cells by BBG. All these findings provided important scientific evidences for better understanding the molecular mechanism of action for the linear beta-(1,3)-glucan in cells. (C) 2016 Elsevier Ltd. All rights reserved.

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