STAT1调节免疫介导的肠干细胞增殖和上皮细胞再生
Shuichiro Takashima1,2, Roshan Sharma3, Winston Chang1,4
1Department of Medicine and Human Oncology & Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA.
Nature communications
|January 2, 2025
概括
通过STAT1传递干扰素-γ信号,在免疫中介损伤后促进肠道干细胞 (ISC) 再生,这对于异构骨髓移植 (BMT) 后的恢复至关重要. 这项研究揭示了组织干细胞的免疫调节.
科学领域:
- 免疫学 免疫学 免疫学
- 干细胞生物学 干细胞生物学
- 胃肠病学 胃肠病学
背景情况:
- 免疫系统和组织干细胞之间的相互作用,特别是在损伤和再生方面,尚未完全理解.
- 在异性骨髓移植 (allo-BMT) 后的移植与宿主疾病 (GVHD) 导致免疫介导的肠上皮损伤,并影响干细胞区.
研究的目的:
- 研究T细胞驱动损伤对肠干细胞 (ISC) 和上皮再生的影响.
- 阐明STAT1和干扰素γ信号在表皮对GVHD的反应中的作用.
主要方法:
- 来自接受实验 BMT 的小鼠肠道密室的单细胞RNA测序.
- 在小鼠肠表皮质中,STAT1和干扰素-γ受体的遗传删除.
- 肠道有机体与活性T细胞共同培养.
主要成果:
- 在GVHD小鼠中,肠干细胞 (ISC) 显示了干细胞对干细胞的反应和STAT1上调的增加.
- STAT1 缺陷或干扰素-γ 受体在表皮质的缺失减少了增殖和ISC恢复后的损害.
- 在ISC中STAT1表达与c-Myc上调相关;干扰素γ直接诱导了STAT1依赖的c-Myc表达和ISC增殖.
结论:
- 干扰素-γ在免疫中介损伤后直接调节一个核心组织干细胞程序.
- 在 allo-BMT 后,STAT1 是表皮再生和ISC恢复的关键媒介,以响应干扰素-γ 信号.
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