A marine-sourced fucoidan solution inhibits Toll-like-receptor-3-induced cytokine release by human bronchial epithelial cells

International Journal of Biological Macromolecules
M DutotP Devillier

Abstract

Fucoidans are sulfated polysaccharides from brown algae, known to have immunomodulatory activity. Their effects on the response of airway epithelial cells to Toll-like receptor 3 (TLR3) stimulation have not been characterized. Our objective was to evaluate the effects of a marine-sourced fucoidan solution (MFS) on the TLR3-induced expression and/or production of cytokines and prostaglandin by human primary bronchial epithelial cells as a model of the airway epithelium. The cells were incubated with MFS in the presence or absence of Poly(I:C) (a TLR3 agonist that mimics viral RNA). Cytokine expression and production were assessed using RT-qPCR and ELISA. The expression of cyclooxygenase-2 and the production of prostaglandin E2 were also measured. Relative to control, exposure to MFS was associated with lower Poly(I:C)-induced mRNA expression of various cytokines and chemokines, and lower COX-2 production. The MFS inhibited the production of some cytokines (IL-1α, IL-1β, TNFα, and IL-6), chemokines (CCL5, CCL22, CXCL1, CXCL5 and CXCL8) and prostaglandin E2 but did not alter the production of IL-12/25, CCL2 and CCL20. At clinically relevant concentrations, the MFS inhibited the TLR3-mediated production of inflammatory mediators by...Continue Reading

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Citations

Oct 12, 2019·Marine Drugs·Helen J FittonSamuel N Karpiniec
Sep 10, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Sergio Rosales-MendozaSornkanok Vimolmangkang
Jul 29, 2020·Frontiers in Cell and Developmental Biology·Jin Zhou, Jie Huang
Dec 31, 2020·Marine Drugs·J Helen FittonDamien N Stringer

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Methods Mentioned

BETA
size exclusion chromatography
surgical resection
ELISAs
ELISA
Assay
electrophoresis
PCR

Software Mentioned

GraphPad
Prism

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