TLR-2 and IL-17A in chitin-induced macrophage activation and acute inflammation.

TLR-2 and IL-17A in chitin-induced macrophage activation and acute inflammation.
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DOI:
10.4049/jimmunol.181.6.4279
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发表时间:
2008-09-15
影响因子:
4.4
通讯作者:
Elias, Jack A.
Elias, Jack A.
中科院分区:
医学2区
文献类型:
--
作者:
Da Silva, Carla A.;Hartl, Dominik;Liu, Wei;Lee, Chun G.;Elias, Jack A.

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Chitin, is a ubiquitous polysaccharide in fungi, insects and parasites. To test the hypothesis that chitin is an important immune modulator, we characterized the ability of chitin fragments to regulate murine macrophage cytokine production in vitro and induce acute inflammation in vivo. Here we show that chitin is a size-dependent stimulator of macrophage interleukin (IL)-17A production and IL-17A receptor (R) expression and demonstrate that these responses are Toll-like Receptor (TLR)-2 and MyD88-dependent. We further demonstrate that IL-17A pathway activation is an essential event in the stimulation of some but not all chitin-stimulated cytokines and that chitin utilizes a TLR-2, MyD88- and IL-17A-dependent mechanism(s) to induce acute inflammation. These studies demonstrate that chitin is a size-dependent pathogen-associated molecular pattern (PAMP) that activates TLR-2 and MyD88 in a novel IL-17A / IL-17AR-based innate immunity pathway.
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