一个细胞质模式识别受体ChNLRC4激活了软体动物中的热灭信号通路
Tianxiang Lin1, Lu Liu1, Liang Zeng1
1Key Laboratory of Breeding Biotechnology and Sustainable Aquaculture, Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
International journal of biological macromolecules
|January 10, 2025
概括
这项研究确定了ChNLRC4,一种激活ChCaspase-1和ChGSDME的蛋白,从而启动热. 这一发现揭示了一个新的NLR-Caspase-GSDME通路,对的免疫力和细菌清除至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 海洋生物学 海洋生物学
背景情况:
- 在哺乳动物中,NLR炎症酶通过Caspase-1和GSDMD触发热.
- 在无脊椎动物中,NLR-Caspase-GSDME轴在很大程度上仍然没有特征.
研究的目的:
- 调查中NLR-Caspase-GSDME通路的存在和功能.
- 描述NLRC4 (ChNLRC4) 在免疫信号传递中的作用.
主要方法:
- 鉴定和表征了ChNLRC4,一种的NLRC4同类物.
- 通过其LRR领域调查了ChNLRC4与LPS和PGN的结合.
- 使用 CARD-CARD 域相互作用检查了 ChNLRC4 与 ChCaspase-1 的相互作用.
- 评估了 ChNLRC4 在 HEK293T 细胞中 ChGSDME 裂变和 pyroptosis 诱导中的作用.
- 分析了 ChNLRC4 淘汰对血细胞免疫反应和细菌清除的影响.
主要成果:
- ChNLRC4与LPS和Lys类型的PGN结合. ChNLRC4与LPS和Lys类型的PGN结合.
- ChNLRC4与ChCaspase-1相互作用,增强其活性.
- 过度表达 ChNLRC4 促进 ChCaspase-1-介导的 ChGSDME 裂变和热.
- 降低ChNLRC4可显著降低血细胞死亡,免疫透,并改善细菌清除.
结论:
- 这项研究揭示了中一种新型的NLR-Caspase-GSDME烧途径.
- ChNLRC4在对细菌感染的天生的免疫力中起着至关重要的作用.
- 这些发现为无脊椎动物中NLR炎症体的演变和功能提供了洞察力.
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