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NF-κB RelA是一种细胞内在的代谢检查点,限制糖解
Liwen Li1, Lei Han1, Zhaoxia Qu2,3
1Department of Microbiology and Molecular Genetics, UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA.
Cell & bioscience
|January 20, 2024
概括
转录因子NF-κB RelA控制着巨细胞代谢,有利于氧化酸化 (OXPHOS) 和癌症压力下的M2激活. 缺少RelA将巨细胞转移到糖解,影响免疫反应.
科学领域:
- 免疫代谢过程中的免疫代谢.
- 细胞的新陈代谢
- 分子生物学分子生物学
背景情况:
- 免疫细胞代谢和功能之间的相互作用至关重要,但控制巨细胞代谢转变的分子机制仍然不清楚.
- 巨细胞在宿主防御,炎症,平衡和疾病中起着至关重要的作用,其代谢状态影响这些功能.
- 了解代谢调节是解读巨细胞在健康和疾病中的作用的关键.
研究的目的:
- 确定控制巨细胞在瘤性压力下代谢切换的主转录因子.
- 阐明NF-κB RelA在调节巨细胞代谢和激活状态中的作用.
- 研究RelA对有氧糖解,氧化酸化和M2激活的影响.
主要方法:
- 在巨细胞中利用NF-κB RelA特异性淘汰和遗传删除.
- 评估的代谢参数包括氧气消耗,乳酸盐和ATP生产.
- 分析了氧化酸化 (OXPHOS) 和M2标记物的基因表达 (例如,SCO2,酶-1,VEGF).
主要成果:
- NF-κB RelA 作为一个限制有氧糖解的检查点,有利于线粒体氧化酸化 (OXPHOS) 和M2巨细胞激活.
- 缺少RelA导致代谢从OXPHOS转向糖解,减少氧气消耗并增加乳酸/ATP的产生.
- 缺乏RelA的巨细胞显示SCO2,阿尔金酶-1和VEGF的表达减少,这些基因是OXPHOS和M2功能的关键基因.
结论:
- NF-κB RelA对于增强OXPHOS和限制巨细胞中的糖解是必不可少的.
- RelA促进M2巨细胞的激活,这与前瘤功能有关.
- 由RelA诱导的SCO2表达对于维持OXPHOS和限制巨细胞中的糖解至关重要.
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