Abstract
β-glucans are potent immunomodulators, with effects on innate and adaptive immune responses via dectin-1 as the main receptor. In this study, we investigated the biological effect of β-glucan from Schizophyllum commune, called Schizophyllan (SPG) on Interleukin-10 (IL-10) expression induced by a lipopolysaccharide (LPS) from Aggregatibacter actinomycetemcomitans in murine macrophages (J774.1). SPG and dectin-1 interaction up-regulates LPS-induced IL-10 expression. The regulative effect of SPG on IL-10 expression is dependent on prolongation of nuclear translocation activity of nuclear factor-kappa B (NF-κBα) pathway induced by LPS. We also found that LPS-induced phosphorylation of mitogen- and stress-activated protein kinase 1 (MSK1) and cAMP-responsive-element-binding protein (CREB), followed by up-regulation of IL-10, was stimulated by SPG priming via activation of the spleen tyrosine kinase (Syk). Our data indicate that SPG augments the anti-inflammatory response in murine macrophages which can be useful to create an intervention for periodontal disease treatment.
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