在外周四肢缺血期间,CSF-1和Notch信号合作指导巨细胞和组织修复
Tamar Kapanadze1,2, Jaba Gamrekelashvili1,2, Stefan Sablotny1,2
1Vascular Medicine Research, Hannover Medical School, Hannover, Germany.
Frontiers in immunology
|September 11, 2023
概括
殖民地刺激因子1 (CSF-1) 和Notch信号传递 (Dll1) 在缺血后对巨细胞发育至关重要. 它们的合作对于组织修复和恢复血液流动至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 再生医学是一种再生医学.
- 血管生物学 血管生物学
背景情况:
- 缺血症会引发一种炎症反应,涉及单细胞衍生的巨细胞 (MF),这对于组织修复至关重要.
- 通过德尔塔样1 (Dll1) 的痕信号,在缺血症条件下调节血管生成和巨分化.
- 殖民地刺激因子1 (CSF-1) 在缺血性巨细胞发育中的作用及其与Notch信号的相互作用仍然不清楚.
研究的目的:
- 研究CSF-1在缺血性巨细胞发育中的作用.
- 在缺血病的背景下阐明CSF-1和Notch信号之间的相互作用.
- 为了确定CSF-1和Notch信号对输液恢复和组织再生后缺血的影响.
主要方法:
- 利用后肢缺血的小鼠模型.
- 服用CSF-1抑制剂 (小分子和阻断抗体).
- 研究了Dll1异性小鼠,并进行了体外分化试验.
主要成果:
- 在缺血性利基中,CSF-1是由表达波多普拉宁的 stromal 细胞诱导,与缺血性巨细胞发育相关.
- 抑制CSF-1损害了巨细胞分化,延长了炎症,并阻碍了输液恢复.
- 尽管CSF-1含量高,但DLL1的哈普洛缺陷导致巨细胞成熟受损,炎症过大, perfusion恢复减少.
- 在体外,单独的CSF-1不足以完全区分MF;DLL1的添加以剂量依赖的方式增强了区分.
结论:
- CSF-1 作为一个与 Notch 信号合作的缺血性利基因子.
- 这种合作是不冗余的,指导着巨细胞的命运和成熟.
- 由CSF-1和Notch信号调节的适当的巨细胞分化对于缺血性 perfusion 恢复和组织修复至关重要.
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