IL-27在感染期间限制HSPC分化,并防止干细胞耗尽
Daniel L Aldridge1, Zachary Lanzar1, Anthony T Phan1
1University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA.
bioRxiv : the preprint server for biology
|January 27, 2025
概括
干白素-27 (IL-27) 作为紧急骨髓形成的制动剂,防止过度的单细胞产生,并在感染期间保持血造干细胞和原生细胞 (HSPC) 功能.
科学领域:
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
- 细胞生物学 细胞生物学
背景情况:
- 炎症刺激会触发紧急骨髓形成,增加骨髓祖先的骨髓细胞产量.
- 这一过程虽然对天生的免疫力至关重要,但可能会对造血干细胞和原生细胞 (HSPC) 功能和长期发育产生负面影响.
- 调节和缓和紧急骨髓形成的机制比促进它的机制要少.
研究的目的:
- 研究细胞因子IL-27在调节紧急骨髓形成中的作用及其对HSPC的影响.
- 了解IL-27如何影响感染期间的单细胞原体生成和炎症单细胞数量.
主要方法:
- 他们利用了缺乏IL-27的小鼠模型,并将它们感染了Toxoplasma gondii.
- 分析了骨髓中细胞因子的产生,局部化和受体表达.
- 采用"体外"差异化试验和混合骨髓模拟测试来评估HSPC的行为.
- 研究了IL-27受体 (IL-27R) 损失对感染后HSPC健身的影响.
主要成果:
- 缺乏IL-27的小鼠在感染后表现出增强的单细胞前体生成和增加的炎症单细胞.
- 感染小鼠的骨髓中IL-27的产生增加,并且在HSPC附近局部化.
- 来自IL-27缺乏的小鼠的HSPCs表现出对单细胞分化的倾向.
- 感染小鼠中IL-27R信号的丧失导致HSPC增殖和造血复合能力的降低.
结论:
- IL-27对HSPCs起作用,为分化提供调控车,限制炎症反应期间过度的单细胞诱导.
- 这种IL-27的功能对于在感染后保持HSPC干和整体造血系统健康至关重要.
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