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- W2147497666 abstract "ABSTRACT β-Glucans derived from fungal cell walls have potential uses as immunomodulating agents and vaccine adjuvants. Yeast glucan particles (YGPs) are highly purified Saccharomyces cerevisiae cell walls composed of β1,6-branched β1,3- d -glucan and free of mannans. YGPs stimulated secretion of the proinflammatory cytokine tumor necrosis factor alpha (TNF-α) in wild-type murine bone marrow-derived myeloid dendritic cells (BMDCs) but did not stimulate interleukin-12p70 (IL-12p70) production. A purified soluble β1,6-branched β1,3- d -glucan, scleroglucan, also stimulated TNF-α in BMDCs. These two β-glucans failed to stimulate TNF-α in Dectin-1 (β-glucan receptor) knockout BMDCs. Costimulation of wild-type BMDCs with β-glucans and specific Toll-like receptor (TLR) ligands resulted in greatly enhanced TNF-α production but decreased IL-12p70 production compared with TLR agonists alone. The upregulation of TNF-α and downregulation of IL-12p70 required Dectin-1, but not IL-10. Gamma interferon (IFN-γ) priming did not overcome IL-12p70 reduction by β-glucans. Similar patterns of cytokine regulation were observed in human monocyte-derived dendritic cells (DCs) costimulated with YGPs and the TLR4 ligand lipopolysaccharide. Finally, costimulation of BMDCs with YGPs and either the TLR9 ligand, CpG, or the TLR2/1 ligand, Pam 3 CSK 4 , resulted in upregulated secretion of IL-1α and IL-10 and downregulated secretion of IL-1β, IL-6, and IFN-γ-inducible protein 10 but had no significant effects on IL-12p40, keratinocyte-derived chemokine, monocyte chemotactic protein 1, or macrophage inflammatory protein α, compared with the TLR ligand alone. Thus, β-glucans have distinct effects on cytokine responses following DC stimulation with different TLR agonists. These patterns of response might contribute to the skewing of immune responses during mycotic infections and have implications for the design of immunomodulators and vaccines containing β-glucans." @default.
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- W2147497666 date "2009-05-01" @default.
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- W2147497666 title "Distinct Patterns of Dendritic Cell Cytokine Release Stimulated by Fungal β-Glucans and Toll-Like Receptor Agonists" @default.
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- W2147497666 doi "https://doi.org/10.1128/iai.00086-09" @default.
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