由于无菌或病原体诱导的内分泌体损伤,NLRP6炎症体被激活
Alexandra Boegli1, Elliott M Bernard1, Louise Lacante1
1Department of Immunobiology, University of Lausanne, Epalinges, Switzerland.
The EMBO journal
|November 20, 2025
概括
炎症体传感器NLRP6检测肠道细胞中的内溶性损伤,触发热和IL-1β释放. 这种免疫反应对于宿主防御病原体和无菌损伤至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 胃肠病学 胃肠病学
背景情况:
- 细胞质的先天免疫传感器NLRP6在胃肠道宿主防御中起作用.
- 确切的NLRP6功能背后的机制仍然在很大程度上是未知的.
研究的目的:
- 阐明NLRP6在肠上皮细胞 (IEC) 中感知危险信号的机制.
- 为了研究内溶体损伤在NLRP6炎症酶激活中的作用.
主要方法:
- 使用了人类肠上皮细胞 (IEC) 和Listeria monocytogenes感染模型.
- 评估了炎酶激活,热和细胞因子释放.
- 研究了细菌因素的作用和内分泌体完整性.
主要成果:
- 在内解体损伤时,NLRP6形成炎症酶,由无菌侮辱或L. monocytogenes引发.
- 激活需要Listeriolysin O-依赖性入侵和NLRP6的NACHT域,从而导致热和IL-1β通过ASC/caspase-1/GSDMD释放.
- 病原体相关分子模式 (PAMPs) 不需要NLRP6激活;相反,内分泌体损伤是关键触发因素.
- 单独的无菌内分泌体损伤可以激活NLRP6并诱导热.
结论:
- 在IEC中,NLRP6充当了内溶性体损伤的传感器.
- 这一途径调解了宿主对微生物病原体和包括内分泌体损伤在内的无菌病理状况的防御.
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