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LACC1 Required for NOD2-Induced, ER Stress-Mediated Innate Immune Outcomes in Human Macrophages and LACC1 Risk Variants Modulate These Outcomes.
Cell Reports ( IF 7.5 ) Pub Date : 2019-12-24 , DOI: 10.1016/j.celrep.2019.11.105
Chen Huang 1 , Matija Hedl 1 , Kishu Ranjan 1 , Clara Abraham 1
Affiliation  

LACC1 genetic variants are associated with multiple immune-mediated diseases. However, laccase domain containing-1 (LACC1) functions are incompletely defined. We find that upon stimulation of the pattern-recognition receptor (PRR) NOD2, LACC1 localizes to the endoplasmic reticulum (ER) and forms a complex with ER-stress sensors. All three ER-stress branches, PERK, IRE1α, and ATF6, are required for NOD2-induced signaling, cytokines, and antimicrobial pathways in human macrophages. LACC1, and its localization to the ER, is required for these outcomes. Relative to wild-type (WT) LACC1, transfection of the common Val254 and rare Arg284 immune-mediated disease-risk LACC1 variants into HeLa cells and macrophages, as well as macrophages from LACC1 Val254 carriers, shows reduced NOD2-induced ER stress-associated outcomes; these downstream outcomes are restored by rescuing ER stress. Therefore, we identify ER stress to be essential in PRR-induced outcomes in macrophages, define a critical role for LACC1 in these ER stress-dependent events, and elucidate how LACC1 disease-risk variants mediate these outcomes.

中文翻译:

NOD2 诱导的、ER 应激介导的人类巨噬细胞先天免疫结果所需的 LACC1 和 LACC1 风险变异调节这些结果。

LACC1 基因变异与多种免疫介导的疾病有关。然而,漆酶结构域包含-1 (LACC1) 功能未完全定义。我们发现,在模式识别受体 (PRR) NOD2 的刺激下,LACC1 定位于内质网 (ER) 并与 ER 应力传感器形成复合物。所有三个 ER 应激分支 PERK、IRE1α 和 ATF6 都是人类巨噬细胞中 NOD2 诱导的信号传导、细胞因子和抗菌途径所必需的。LACC1 及其对 ER 的本地化是这些结果所必需的。相对于野生型 (WT) LACC1,将常见的 Val254 和罕见的 Arg284 免疫介导的疾病风险 LACC1 变体转染到 HeLa 细胞和巨噬细胞以及来自 LACC1 Val254 携带者的巨噬细胞中,显示出 NOD2 诱导的 ER 应激相关性降低结果;这些下游结果通过挽救 ER 压力得以恢复。因此,我们确定 ER 应激对 PRR 诱导的巨噬细胞结果至关重要,定义了 LACC1 在这些 ER 应激依赖性事件中的关键作用,并阐明了 LACC1 疾病风险变异如何介导这些结果。
更新日期:2019-12-25
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