HIF-1α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, Chicago, IL 60637 USA.
bioRxiv : the preprint server for biology
|October 28, 2024
概括
缺氧诱导因子1-α (HIF-1α) 不同调节巨细胞代谢和炎症. 它的作用在组织定居的膜巨细胞和骨髓衍生巨细胞之间有所不同,影响糖分分解能力和炎症反应.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 代谢过程中的代谢.
背景情况:
- HIF-1α对巨细胞的表型和功能至关重要.
- 组织居住的膜巨细胞 (TR-AMs) 呈现出低基线葡萄糖分解,但在缺氧的情况下可以增加它.
- 之前的工作确立了TR-AMs的糖溶性可塑性.
研究的目的:
- 在不同的条件下,研究HIF-1α在TR-AM和骨髓衍生巨细胞 (BMDMs) 中的特定作用.
- 阐明HIF-1α如何影响巨细胞代谢,炎症和基因表达.
- 了解不同巨细胞种群中HIF-1α功能的异质性.
主要方法:
- 使用可诱导的HIF-1α淘汰 (Hif1a-/-) TR-AM和BMDM.
- 评估糖分分解能力和炎症效应因子功能.
- 进行基因组丰富分析 (GSEA) 来分析转录活性.
主要成果:
- TR-AM HIF-1α在基酶抑制下对糖溶性转移至关重要,但在稳定状态下并不重要.
- 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.
- 在Hif1a-/- BMDMs中,GSEA显示了c-Myc活性和核糖体生物发生和扩散的途径的增加.
结论:
- 在不同的巨细胞群中,HIF-1α功能是异质的.
- 在TR-AMs和BMDMs中,HIF-1α对基因表达,炎症和新陈代谢的调节不同.
- 这些发现为HIF-1α在巨细胞生物学中的作用提供了新的见解.
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