Spatiotemporal inhibition of innate immunity signaling by the Tbc1d23 RAB-GAP.

Spatiotemporal inhibition of innate immunity signaling by the Tbc1d23 RAB-GAP.
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DOI:
10.4049/jimmunol.1102595
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发表时间:
2012-03-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Alper S
Alper S
中科院分区:
其他
文献类型:
--
作者:
De Arras L;Yang IV;Lackford B;Riches DW;Prekeris R;Freedman JH;Schwartz DA;Alper S

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我们之前在C.线虫和小鼠巨噬细胞。使用Tbc 1d 23敲除小鼠和经过改造过表达Tbc 1d 23的巨噬细胞,我们现在表明Tbc 1d 23是先天免疫信号传导的一般抑制剂,强烈抑制多种Toll样受体(TLR)和Dectin信号传导途径。Tbc 1d 23可能作用于TLR信号转导衔接子MyD 88和Trif的下游以及转录因子XBP 1的上游。重要的是,像XBP 1一样,Tbc 1d 23影响脂多糖(LPS)诱导的炎性细胞因子产生的维持,但不影响其起始。Tbc 1d 23作为RAB-GAP调节先天免疫信号传导。因此,Tbc 1d 23以时空方式对先天免疫信号传导发挥其抑制作用。一种新的先天免疫信号时空调节因子的鉴定验证了先天免疫基因发现的比较基因组学方法。
We previously identified Tbc1d23 as a candidate novel regulator of innate immunity using comparative genomics RNAi screens in C. elegans and mouse macrophages. Using Tbc1d23 knockout mice and macrophages engineered to overexpress Tbc1d23, we now show that Tbc1d23 is a general inhibitor of innate immunity signaling, strongly inhibiting multiple Toll-like receptor (TLR) and Dectin signaling pathways. Tbc1d23 likely acts downstream of the TLR signaling adaptors MyD88 and Trif and upstream of the transcription factor XBP1. Importantly, like XBP1, Tbc1d23 affects the maintenance but not the initiation of inflammatory cytokine production induced by lipopolysaccharide (LPS). Tbc1d23 acts as a RAB-GAP to regulate innate immunity signaling. Thus, Tbc1d23 exerts its inhibitory effect on innate immunity signaling in spatiotemporal fashion. The identification of a novel spatiotemporal regulator of innate immunity signaling validates the comparative genomics approach for innate immunity gene discovery.
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