Abstract
Dendritic cells (DCs) are now recognised as the most potent professional antigen presenting cells (APCs) involved in initiating primary immune responses. The medicinal mushroom Antrodia camphorata (AC) is one of the most popular chemopreventive mushrooms in Taiwan. Polysaccharides of mushroom products are among emerging new agents that activate maturation and functions of DCs. The aim of this study is to investigate the immunomodulating activity of A. camphorata extract (ACW) on functional maturation of DCs. Compared with lipopolysaccharides (LPS), ACW effectively promoted the functional maturation of DCs in the expression of phenotypic characteristics and IL-12 production and chemotaxic activity. Moreover, ACW increased the phosphorylation of Akt, p38, and JNK/MAPKs in DCs. Specific inhibitors, SB203580 and LY94002, significantly blocked the ACW-induced up-regulation of costimulatory factor expression, IL-12 production. These findings suggest that ACW is a potent adjuvant for cancer immunotherapy and promotes Th1 immune responses.
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