非规范性炎症酶激活的目标是caspase-11
Nobuhiko Kayagaki1, Søren Warming, Mohamed Lamkanfi
1Department of Physiological Chemistry, Genentech Inc., South San Francisco, California 94080, USA. kayagaki@gene.com
Nature
|October 18, 2011
概括
卡斯帕酶-11对于通过激活卡斯帕酶-1和产生IL-1β.通过激活卡斯帕酶-1和产生IL-1β.启动对细菌感染的先天免疫反应至关重要. 失去了caspase-11可以保护小鼠免受致命的内毒素冲击.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 炎症酶激活,涉及NLRs和ASC,对于IL-1β和IL-18在先天免疫中的产生至关重要.
- 卡斯帕酶-1激活被认为是这种促炎性细胞因子产生必不可少的.
研究的目的:
- 调查酶-11在细菌感染期间炎症酶激活和细胞因子产生中的作用.
- 澄清caspase-1和caspase-11在先天性免疫反应中的不同作用.
主要方法:
- 使用C57BL/6和129菌株小鼠,包括Casp11基因向小鼠 (Casp11(-/-)).
- 分析了通过各种细菌物种 (大肠杆菌,类动物,霍乱),ATP和单酸盐刺激的巨细胞中的IL-1β产生.
- 使用细菌人造染色体转基因在缺乏巨细胞中表达caspase-11.
主要成果:
- 卡斯巴酶-11对于卡斯巴酶-1的激活和IL-1β的产生至关重要,以应对大肠杆菌,C. rodentium和V. cholerae.
- 第129个菌株的小鼠具有缺陷的Casp11位点,损害了IL-1β的产生.
- 卡斯帕斯-11,而不是卡斯帕斯-1,调解非正规的炎症酶诱导的巨细胞死亡.
- 卡斯巴-11的损失可以保护人免受致命的脂多糖的挑战.
结论:
- 卡斯巴酶-11在对细菌感染的天生的免疫反应中发挥着关键的,非正规的作用.
- 卡斯巴-11调节了卡斯巴-1依赖性和独立性炎症通路.
- 不同的激活剂可能存在于非正规炎症酶激活中的caspase-11和caspase-1.
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