内分泌体损伤监测能够快速感知病原体的炎症体
Sonia Shivcharan1, Doulathunnisa Ahamed Younis1, Skylar S Wright1
1Department of Immunology, UConn Health School of Medicine, 263 Farmington Avenue, Farmington, CT 06030, USA.
Cell reports
|July 16, 2025
概括
加勒-8对内体损伤的感知使得炎症酶对细胞内细菌的快速激活成为可能. 这将膜损伤检测与caspase-4激活和对病原体的宿主防御联系起来.
科学领域:
- 细胞微生物学 细胞微生物学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 炎症酶监测宿主细胞细胞醇的病原体.
- 在病原体入侵过程中,盖莱克可以检测内分泌体内膜损伤.
- 内膜损伤传感和炎症酶激活之间的相互作用仍然不清楚.
研究的目的:
- 调查内膜损伤感应在对细胞内细菌的炎症酶激活中的作用.
- 阐明加勒-8影响非正规炎症体传感的机制.
主要方法:
- 利用了缺少加勒-8的人类上皮细胞.
- 评估了卡斯巴酶-4激活,气体皮质素D (GSDMD) 介导的灭,以及互白素 (IL) - 18激活.
- 通过共同复杂的形成和招募试验,研究了galectin-8和caspase-4之间的相互作用.
主要成果:
- 加列-8 缺乏症显著降低了细胞内细菌的炎症体感应,包括卡斯帕-4 激活,热和IL-18 释放.
- 加勒-8促进了独立于NDP52和细菌限制的卡斯帕-4激活.
- 加勒-8与-4形成复合体,并在内分泌体破裂时将其招募到细菌中,从而促进脂多糖 (LPS) 传感.
结论:
- 加勒-8 作为内膜损伤监测和炎症体传感之间的关键联系.
- 盖莱克-8-卡斯巴-4复合体能够快速检测入侵内分泌体网络的宿主细菌.
- 这种集成的传感机制增强了对细胞内细菌病原体的宿主防御.
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