HIF-1 调节骨髓衍生的巨细胞中的线粒体功能,但不是在组织居住的膜巨细胞中
Parker S Woods1, Rengül Cetin-Atalay1, Angelo Y Meliton1
1Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, 5841 S. Maryland Avenue MC6026, Chicago, IL, 60637, USA.
Scientific reports
|April 4, 2025
概括
低氧诱导因子1-alpha (HIF-1α) 对巨细胞代谢的影响不同. 虽然HIF-1α对于膜巨细胞的缺氧反应至关重要,但对于它们的稳定状态功能是不可或缺的,但它调节骨髓衍生巨细胞中的线粒体活性.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞的新陈代谢
- 分子生物学分子生物学
背景情况:
- HIF-1α是细胞对低氧反应的关键调节者.
- 大细胞表现出不同的表型和功能,受其微观环境的影响.
- 组织定居的膜巨细胞 (TR-AMs) 具有低基底糖解,与骨髓衍生巨细胞 (BMDMs) 不同.
研究的目的:
- 研究HIF-1α在调节巨细胞代谢和功能中的作用.
- 为了比较HIF-1α在TR-AM和BMDM中的功能.
- 阐明HIF-1α对炎症反应和线粒体活动的影响.
主要方法:
- 产生的骨髓细胞特异性诱导性Hif1a淘汰赛小鼠 (Hif1a:LysM-CreERT2+/-).
- 隔离和分析了与Hif1a删除的TR-AMs和BMDMs.
- 利用prolyl氧酶抑制来诱导缺氧状况.
- 进行了基因组丰富分析 (GSEA).
主要成果:
- TR-AM HIF-1α在缺氧下对糖分转移至关重要,但不是稳定状态炎症.
- 在BMDM中HIF-1α删除减少了糖分和炎症能力,但增强了线粒体功能.
- GSEA揭示了在Hif1a-/- BMDM中增加c-Myc活性和核糖体生物发生/增殖的途径.
结论:
- 与TR-AM相比,HIF-1α在BMDM中不同调节线粒体功能.
- 突出了HIF-1α在不同巨细胞群中的功能异质性.
- 提供了 HIF-1α 对巨细胞基因表达,炎症和新陈代谢的控制的见解.
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