PEDV感染通过激活Notch通路来降低杯状细胞的分化
Yi Wang1,2, Shanshan Yang2, Yongxiang Zhao2
1School of Veterinary Medicine, Hebei Agricultural University, Baoding, China.
Veterinary research
|August 13, 2025
概括
猪流行性腹病毒 (PEDV) 通过减少杯状细胞,损害小猪肠道屏障功能. PEDV感染激活了Notch和MAPK通路,同时抑制了Wnt/β-catenin,阻碍了杯状细胞的分化.
科学领域:
- 兽医病毒学 兽医病毒学
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
背景情况:
- 猪流行性腹病毒 (PEDV) 是一种主要的猪肠道冠状病毒,导致小猪死亡率很高.
- 由于PEDV引起的肠道功能障碍和屏障破坏的确切机制仍然不完全理解.
- 玻璃杯细胞对于肠道屏障功能至关重要,而它们通过PEDV的调节是研究的一个关键领域.
研究的目的:
- 阐明PEDV影响肠上皮细胞功能和分化的分子机制.
- 调查PEDV感染对小猪杯细胞数量和肠壁完整性的影响.
- 为了识别涉及PEDV介导肠道平衡中断的信号通路.
主要方法:
- 来自实验性感染PEDV的新生猪的肠道组织的分析.
- 在体外研究中使用肠道单层有机体模型.
- 研究关键信号通路,包括Notch,MAPK和Wnt/β-catenin.
- 评估杯状细胞分化和肠道屏障完整性标记物.
主要成果:
- 在小猪中,PEDV感染显著减少了杯状细胞数量,并损害了肠道屏障的完整性.
- PEDV感染激活了Notch和MAPK信号通路,同时抑制了小猪肠中的Wnt/β-catenin通路.
- 在体外有机体模型表明,PEDV通过Notch通路激活来阻碍杯状细胞的分化.
- 确定了PEDV ORF3蛋白作为激活Notch通路和抑制杯状细胞分化的关键调解剂.
结论:
- PEDV感染通过减少杯状细胞来破坏肠道粘膜屏障的完整性,这一过程由特定的信号通路介导.
- 诺奇信号通路在抑制PEDV感染期间杯状细胞分化方面发挥着关键作用.
- 通过Notch通路激活,PEDV ORF3蛋白与肠道屏障功能障碍的发病有关.
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