HMGB1 Activates Proinflammatory Signaling via TLR5 Leading to Allodynia.

HMGB1 Activates Proinflammatory Signaling via TLR5 Leading to Allodynia.
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DOI:
10.1016/j.celrep.2016.09.076
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发表时间:
2016-10-18
期刊:
影响因子:
8.8
通讯作者:
Yin H
Yin H
中科院分区:
生物学1区
文献类型:
--
作者:
Das N;Dewan V;Grace PM;Gunn RJ;Tamura R;Tzarum N;Watkins LR;Wilson IA;Yin H

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感染性和无菌性炎性疾病与组织和血清中高迁移率族蛋白1(HMGB 1)水平升高相关。已知细胞外HMGB 1在炎症条件下激活Toll样受体(TLR)2、4和Toll(晚期糖基化终产物受体)。在这里,我们发现TLR 5也是一种HMGB 1受体,以前由于在通常用于研究TLR信号传导的细胞系中缺乏功能表达而被忽视。HMGB 1与TLR 5的结合以MyD 88依赖性方式启动NF-κB信号通路激活,导致体内促炎细胞因子产生和疼痛增强。生物物理和体外结果突出了HMGB 1的C-末端尾部区域在促进与TLR 5的相互作用中的重要作用。这些结果表明,HMGB 1调节的TLR 5信号是负责疼痛超敏反应。
Infectious and sterile inflammatory diseases are correlated with increased levels of high mobility group box-1 (HMGB1) in tissues and serum. Extracellular HMGB1 is known to activate toll-like receptors (TLRs) 2, 4 and RAGE (receptor for advanced glycation endproducts) in inflammatory conditions. Here we find that TLR5 is also an HMGB1 receptor that was previously overlooked due to lack of functional expression in the cell lines usually used for studying TLR signaling. HMGB1 binding to TLR5 initiates NF-κB signaling pathway activation in a MyD88-dependent manner, resulting in proinflammatory cytokine production and pain enhancement in vivo. Biophysical and in vitro results highlight an essential role for the C-terminal tail region of HMGB1 in facilitating interactions with TLR5. These results suggest that HMGB1-modulated TLR5 signaling is responsible for pain hypersensitivity.
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