IL-12 Production Induced by Agaricus blazei Fraction H (ABH) Involves Toll-like Receptor (TLR).
IL-12 Production Induced by Agaricus blazei Fraction H (ABH) Involves Toll-like Receptor (TLR).
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DOI：
10.1093/ecam/neh043
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发表时间：
2004-12
期刊：
影响因子：
--
通讯作者：
Ito M
中科院分区：
文献类型：
--
作者：
Kasai H;He LM;Kawamura M;Yang PT;Deng XW;Munkanta M;Yamashita A;Terunuma H;Hirama M;Horiuchi I;Natori T;Koga T;Amano Y;Yamaguchi N;Ito M
Agaricus blazei Murill is an edible fungus used in traditional medicine, which has various well-documented medicinal properties. In the present study, we investigated the effects of hemicellulase-derived mycelia extract (Agaricus blazei fraction H: ABH) on the immune system. First, we examined the cytokine-inducing activity of ABH on human peripheral mononuclear cells (PBMC). The results indicated that ABH induced expression of IL-12, a cytokine known to be a critical regulator of cellular immune responses. Flow cytometric analysis demonstrated the induction of IL-12 production by the CD14-positive cell population, consisting of monocytes/macrophages (Mo/Mφ). Furthermore, the elimination of Mo/Mφ attenuated IL-12 production in PBMC. ABH-induced IL-12 production was inhibited by anti-CD14 and anti-TLR4 antibodies but not by anti-TLR2 antibody. The activity of ABH was not inhibited by polymyxin B, while the activity of lipopolysaccharide used as a reference was inhibited. Oral administration of ABH enhanced natural killer (NK) activity in the spleen. These findings suggest that ABH activated Mo/Mφ in a manner dependent on CD14/TLR4 and NK activity.
