质子激活化物通道1 (PACC1) 对于对细菌败血症的天生的宿主防御至关重要
bioRxiv : the preprint server for biology
|January 9, 2026
概括
对酸敏感的化物通道PACC1 (PAC/ASOR/TMEM206) 对抗细菌败血症的宿主防御至关重要. 删除PACC1会损害细菌清除,增加败血症致死率,突出其在天生的免疫力中的保护作用.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生理学分子生理学
背景情况:
- 细菌性败血症是一种危及生命的疾病,对全球健康产生重大影响.
- 主体防御机制,特别是在髓状细胞内,对于对抗败血症至关重要.
- 特定离子通道在先天免疫和败血症解决中的作用仍然不完全理解.
研究的目的:
- 研究质子激活化通道PACC1 (PAC/ASOR/TMEM206) 在细菌败血症期间宿主防御中的作用.
- 确定PACC1缺陷对髓状细胞中虫体功能和免疫反应的影响.
- 在实验性败血症模型中阐明PACC1对生存和炎症的贡献.
主要方法:
- de novo Pacc1淘汰赛 (-/-) 小鼠的生成和表征.
- 使用pH敏感E.E.在髓状细胞中分析化和细菌清除的分析. 大肠杆菌的生物颗粒.
- 对Pacc1巨细胞的转录组分析.
- 实验性挑战与E.E. 在WT和Pacc1小鼠中发生大肠杆菌败血症和肺炎球菌肺炎.
- 生成髓状细胞特异性的Pacc1淘汰小鼠 (LysM-Cre/Pacc1) 来评估细胞内在功能.
主要成果:
- PACC1在巨细胞中富含,其缺乏会损害菌体酸性化和细菌清除.
- Pacc1-/-小鼠表现出对E.E.的敏感性增加. 大肠杆菌败血症和肺炎球菌性肺炎,其特点是较高的细菌负担,炎症和死亡率.
- 骨髓细胞中PACC1的特异性删除重复了败血症敏感性表型,证实了其细胞内在的保护作用.
- 在LPS诱导的内毒素症中,PACC1缺乏没有影响存活率,这表明其主要作用在于细胞酶依赖的细菌清除.
结论:
- PACC1通过调节菌体酸化和细菌清除,在宿主防御细菌败血症方面发挥着关键的保护作用.
- PACC1与免疫细胞功能和炎症网络相关联,这些网络对于败血症解决至关重要.
- 向PACC1可能提供一种新的治疗策略,用于增强败血症中宿主防御.
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