删除内源性神经调节-4限制了互白素-10受体中和性结肠炎期间的适应性免疫力
Jessica K Bernard1,2, Edie B Bucar1, Cambrian Y Liu1,3
1Saban Research Institute, Children's Hospital Los Angeles, Los Angeles, CA, USA.
Inflammatory bowel diseases
|June 2, 2023
概括
内源性神经调节素-4 (NRG4) 在结肠炎中起着双重作用. 它保护免受自适应性免疫反应驱动的损伤,但加剧了先天性免疫反应的损伤,影响ST3GAL4表达.
科学领域:
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 像神经调节素-4 (NRG4) 这样的生长因子对于肠道健康至关重要.
- 外源NRG4有助于结肠细胞的存活,并减少急性炎症.
- 内源NRG4在结肠炎中的作用尚不清楚.
研究的目的:
- 在大肠炎的适应性和先天性免疫反应模型中研究内源性NRG4的功能.
- 阐明NRG4影响肠道炎症的分子机制.
主要方法:
- 在IL-10R中和化 (适应性) 和DSS (先天性) 大肠炎模型中利用NRG4淘汰 (NRG4-/-) 和野生型小鼠.
- 通过组织学,细胞因子水平,利波卡林-2和免疫细胞分析来评估疾病的严重程度.
- 使用RNA测序和qPCR分析基因表达变化.
主要成果:
- 在适应性结肠炎中,NRG4-/-小鼠的炎症和CD8+T细胞减少,但在先天性结肠炎中,损伤增加和恢复受损.
- NRG4的损失导致结肠中ST3GAL4 (sialyltransferase) 表达的减少.
- NRG4直接调节结肠上皮细胞中的ST3GAL4表达.
结论:
- 内源NRG4调节结肠ST3GAL4,影响适应性结肠炎中CD8+T细胞的招募.
- 在先天性免疫驱动性结肠炎模型中,NRG4缺乏会使损伤恶化.
- NRG4在肠道炎症中具有不同的,取决于背景的作用.
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