细胞质LPS诱导的caspase-11寡合化和激活是由扩展的synaptotagmin1调节的
1Department of Clinical Laboratory, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, P.R. China; Department of Pathology, The University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, IA 52242, USA; Key Laboratory of Precision Medicine in Diagnosis and Monitoring Research of Zhejiang Province, Hangzhou, Zhejiang, P.R. China.
扩展型突触胺1 (E-Syt1) 调节酶-11 (Casp-11) 激活,这是细胞防御细菌病原体的关键过程. E-Syt1 作为Casp-11 寡合化的平台,对热致死和细胞因子释放至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 酶-11 (Casp-11) 对于热和对细胞内细菌的宿主防御是必不可少的.
- 控制Casp-11激活的精确监管机制仍然不完全理解.
研究的目的:
- 为了确定Casp-11寡合化和激活的新型调节剂.
- 阐明扩展型突触胺1 (E-Syt1) 在Casp-11介导的炎症反应中的作用.
主要方法:
- 利用淘汰性巨细胞 (ESyt1-/-) 来评估E-Syt1缺乏对细胞反应的影响.
- 使用生物化学分析研究了E-Syt1和Casp-11之间的蛋白质-蛋白质相互作用.
- 采用细菌感染模型和脂多糖体 (LPS) 刺激来研究热和细胞因子产生.
主要成果:
- 缺少E-Syt1的巨细胞显著减少了互白素-1β (IL-1β) 的产生,并且导致了灭.
- 在脂聚糖 (LPS) 刺激后,E-Syt1直接与Casp-11相互作用,促进Casp-11的寡合化和激活.
- ESyt1-/-小鼠表现出对细菌感染的敏感性增加,但对LPS诱导的内毒素耐药性.
结论:
- 扩展型突触胺1 (E-Syt1) 是Casp-11激活的关键调节剂.
- E-Syt1作为Casp-11寡合化的平台,在感知细胞质LPS时,对于激光灭亡诱导至关重要.
- 准E-Syt1可能为炎症性疾病和细菌感染提供治疗策略.
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