调节肠道干细胞的更新和分化
Moshe Biton1, Adam L Haber2, Noga Rogel2
1Klarman Cell Observatory, Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA; Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA.
Cell
|November 6, 2018
概括
免疫细胞,特别是T辅助细胞,与表达MHCII类机器的肠干细胞 (ISC) 相互作用. 这些相互作用影响ISC的自我更新和分化,影响感染期间的肠上皮的修复.
科学领域:
- 胃肠病学
- 免疫学
- 干细胞生物学
背景情况:
- 小肠的上皮细胞从肠干细胞 (ISC) 持续更新.
- 免疫细胞在调节干细胞命运中的作用在很大程度上是未知的.
- 中的辅助细胞类型支持ISC分化为成熟的上皮细胞.
研究的目的:
- 研究免疫细胞对肠道干细胞 (ISC) 命运和上皮细胞平衡的影响.
- 确定特定的免疫细胞子集和参与调节ISC自我更新和分化的分子机制.
- 了解这些相互作用如何影响肠上皮的再生,特别是在感染期间.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 来识别ISC中的基因表达特征.
- 共同培养实验以评估MHCII类表达ISC与T辅助细胞的功能.
- 用T辅助细胞细胞因子刺激肠道器官,以研究ISC反应.
- 在体内基因干扰模型分析T辅助细胞和MHCII在感染期间对上皮分化的影响.
主要成果:
- 两组Lgr5+ISC被发现为MHCII类机器进行缩.
- 在与CD4+T辅助细胞 (Th) 的共同培养中,MHCII+Lgr5+ISCs作为非传统的抗原呈现细胞起作用.
- 细胞细胞因子差异调节Lgr5+ISC的更新和分化;促炎信号促进分化,而调节信号则抑制它.
- 在体内ISC的Th细胞或MHCII乱会影响上皮细胞的分化和感染期间肠道上皮细胞的命运.
结论:
- 辅助T细胞和表达MHCII的ISC进行交叉交流,调节肠道干细胞的行为.
- 这种免疫-上皮相互作用在组织对外部刺激,如感染的反应中起着至关重要的作用.
- 了解这些机制是开发肠道疾病和再生治疗策略的关键.
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