I型干扰素控制着免疫代谢检查点,这些检查点在葡萄球菌感染期间协调炎症
Mack B Reynolds1, Benjamin Klein2, Michael J McFadden1
1Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
Cell reports
|August 10, 2024
概括
一种类型的干扰素 (IFN) 在黄金葡萄球菌感染期间暂时控制巨细胞代谢. 这种调节通过改变能量路径和细胞因子生产来影响炎症,从而影响感染结果.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢途径 代谢途径
- 传染性疾病传染性疾病.
背景情况:
- 巨细胞的代谢可塑性对炎症至关重要,但其在感染期间与炎症程序的协调仍然不清楚.
- 了解这些机制对于开发针对MRSA等细菌感染的向疗法至关重要.
研究的目的:
- 为了阐明I型干扰素 (IFN) 如何在耐甲素黄金葡萄球菌 (MRSA) 感染期间暂时调节巨细胞代谢重编程.
- 为了研究细胞代谢和炎症信号之间的相互作用,以应对S. aureus.
主要方法:
- 对巨细胞信号通路的分析,包括Toll-like受体和I型IFN信号的分析.
- 评估代谢状态,如氧化酸化 (OXPHOS) 和有氧糖解.
- 测量关键的炎症媒介,如可诱导的氧化合成酶 (iNOS) 和细胞因子.
- 对表观遗传修饰的研究,特别是基因素乳化,以及它们在基因调节中的作用.
- 使用皮肤MRSA感染的小鼠模型与改变的I型IFN信号.
主要成果:
- I型IFN信号暂时协调巨细胞代谢,从联合OXPHOS和糖解转变为iNOS介导的OXPHOS干扰.
- 这种新陈代谢转变促进了I型IFN的产生,同时抑制了像IL-1β这样的促炎细胞因子.
- 在感染后24小时,iNOS表达达到顶峰,随后通过基因素乳化通过乳酸驱动的No2抑制.
- 第一种IFN预先调节扩展了iNOS表达,放大了第一种IFN反应.
- 在小鼠中,构成性表皮类型I IFN导致iNOS增加,伤口愈合受损,血管病变和肺部感染.
结论:
- 动态调节的I型IFN信号传递在S. aureus感染期间作为免疫代谢检查点的关键协调员.
- 受I型IFN影响的代谢重编程在控制感染引起的炎症及其后果方面发挥着重要作用.
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