在炎症性肠病中,细胞内膜网膜应激被上调,并为TLR2通路介导的炎症反应做出了贡献
Weijie Wu1, Yan Zhao2, Tian Hu1
1Department of Digestive Diseases, Changsha Central Hospital Affiliated to University of South China, Changsha, Hunan, China.
Immunopharmacology and immunotoxicology
|December 26, 2023
概括
细胞内膜网膜应激 (ERS) 促进了Toll-like受体2 (TLR2) 信号传递,增加了炎症性肠病 (IBD) 的炎症. 使用TUDCA抑制ERS会降低这种反应,这表明ERS和TLR2是IBD的治疗点.
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:
- 炎症性肠病 (IBD) 的特点是慢性炎症.
- 细胞内膜网膜应激 (ERS) 和托尔类受体2 (TLR2) 信号传递与IBD病原发生有关.
- 在IBD中TLR2和ERS之间的确切关系尚不清楚.
研究的目的:
- 调查细胞内膜网膜应激 (ERS) 和在炎症性肠病 (IBD) 中信号传递的托尔类受体2 (TLR2) 之间的联系.
- 为了确定thapsigargin (TG) 诱导的ER蛋白表达是否有助于TLR2介导的炎症反应.
主要方法:
- 用TLR2激动剂,ERS诱导剂 (Thapsigargin) 和抑制剂 (TUDCA) 对THP-1细胞进行治疗.
- 用qPCR,PCR和ELISA分析了TLR和炎症因子的基因和蛋白质表达.
- 免疫组织化学评估了克罗恩病患者组织中的GRP78和TLR2.
- 一个IBD小鼠模型被建立并用ERS抑制剂治疗.
主要成果:
- 塔普西加金 (TG) 增加了THP-1细胞中的TLR2和TLR5表达.
- TG以TLR2-依赖的方式增强了炎症因子 (TNF-α,IL-1β,IL-8) 的产生,这是TUDCA阻止的效应.
- 在克罗恩病患者的肠道粘膜中,TLR2和GRP78的高调显著.
- 在小鼠模型中,TUDCA治疗降低了肠道炎症和GRP78/TLR2蛋白水平.
结论:
- 在IBD中,细胞内膜网膜应激 (ERS) 和TLR2信号被上调.
- ERS可能会加剧由TLR2通路调解的炎症反应.
- 针对ERS和TLR2信号提供了IBD的潜在治疗策略.
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