由IL-18和循环二核酸cGAMP编排的代谢开关编程了肠道耐受性
Randall T Mertens1, Aditya Misra2, Peng Xiao3
1Gene Lay Institute of Immunology and Inflammation, Brigham and Women's Hospital, Mass General Hospital, and Harvard Medical School, Boston, MA 02115, USA; Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA; Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA.
Immunity
|June 21, 2024
概括
这项研究揭示了一种先天的免疫代谢开关,通过重编程巨细胞来促进长期的肠道耐受性. 这种由互白素-18 (IL-18) 驱动的开关,将新陈代谢转移到脂肪酸氧化 (FAO),增强免疫记忆和肠道耐受性.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢途径 代谢途径
- 组织特异性免疫反应.
背景情况:
- 免疫反应是由特定组织的炎症挑战塑造的.
- 细胞代谢关键调节免疫细胞的功能.
- 代谢在组织中编程稳定的免疫状态的机制尚不清楚.
研究的目的:
- 研究细胞代谢是如何在组织内规划和稳定免疫状态的.
- 了解新陈代谢重编程如何影响易受炎症的敏感性.
- 确定促进肠道长期免疫耐受性的代谢途径.
主要方法:
- 研究了介素-18 (IL-18) 在编程肠道巨细胞中的作用.
- 在巨细胞中分析了从糖解到脂肪酸氧化 (FAO) 的代谢重编程.
- 利用分子和细胞测试来识别关键信号通路,包括SLC12A3 (NCC),STING和cGAMP.
主要成果:
- 通过将它们重新编程为脂肪酸氧化 (FAO),远离促炎性糖解,IL-18刺激诱导了宽容性巨细胞.
- 这种代谢切换是由IL-18介导的SLC12A3 (NCC) 激活启动的,导致流入,线粒体DNA释放和STING激活.
- 一个双可变的开关,涉及cGAMP和IL-18的细胞间正反循环,维持了FAO和编码的免疫记忆,以获得持久的肠道耐受性.
结论:
- 一个由组织强化的先天免疫代谢开关促进了长期的肠道耐受性.
- 这种对粮农组织的代谢重编程对于建立和维护免疫记忆至关重要.
- 这些发现表明,在慢性炎症条件下重建免疫耐受性的潜在治疗策略.
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