由内质网膜应激和NOD2引起的MAPK信号介导的肠炎症
Siyuan Peng1, Yan Zhao2, Wang Jiang1
1Department of Digestive Diseases, Changsha Central Hospital Affiliated to University of South China, No.161 Shaoshan Nanlu, Changsha, Hunan, China.
Molecular and cellular biochemistry
|January 13, 2025
概括
细胞内膜网膜 (ER) 的压力会增加NOD2的表达,导致炎症性肠病 (IBD) 的炎症. 抑制ER压力和MAPK信号,可以缓解IBD症状.
科学领域:
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 细胞内膜网膜 (ER) 压力与炎症性肠病 (IBD) 病原发生有关.
- 将ER压力与IBD炎症联系在一起的精确机制需要进一步阐明.
研究的目的:
- 调查ER压力在IBD内促进炎症中的作用.
- 确定ER压力,NOD2表达和IBD中的炎症性细胞因子产生之间的关系.
主要方法:
- 在克罗恩氏病患者组织和IBD小鼠模型中对ER压力标志物 (Grp78) 和NOD2的免疫组织化学分析.
- 在体外研究中,使用暴露于ER压力诱导剂和NOD2连接体的THP-1细胞.
- 定量PCR用于评估炎症性细胞因子表达 (TNF-α,IL-8,IL-1β).
- 药理上抑制ER压力和MAPK信号通路.
主要成果:
- 在CD组织和ER压力THP-1细胞中,ER压力标志物 (Grp78) 和NOD2被上调.
- 在体内,ER应激抑制改善了结肠炎,并减少了Grp78和NOD2的表达.
- 与NOD2激活相结合的ER压力通过MAPK信号传递调节了促炎细胞因子 (TNF-α,IL-8,IL-1β).
- 抑制MAPK通路降低了炎症性细胞因子的产生.
结论:
- 细胞内膜网膜应激上调NOD2表达,有助于IBD的炎症.
- 该MAPK信号通路是ER在IBD中因应激引起的炎症的关键调解者.
- 针对ER压力和MAPK信号可能为IBD提供治疗策略.
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