肠质细胞通过在高海拔条件下分泌S100β而加剧肠上皮质屏障损伤
Huichao Xie1, Xiong Zeng1, Wensheng Wang1
1Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China.
Molecular biomedicine
|October 1, 2023
概括
高空暴露会通过肠道质细胞 (EGC) 损害肠道屏障. 缺氧下EGC增加的S100β加剧了这种损伤,为预防与高度相关的胃肠道疾病提供了新的目标.
科学领域:
- 生理学 生理学 生理学
- 胃肠病学 胃肠病学
- 高度医学 高度医学
背景情况:
- 肠上皮屏障 (IEB) 损伤与高海拔 (HA) 胃肠道 (GI) 疾病有关.
- 现有的机制不能完全解释急性HA相关的胃肠道症状,如浮气和腹.
研究的目的:
- 在HA条件下研究肠质细胞 (EGC) 在IEB损伤中的作用.
- 阐明EGCs对HA诱导的胃肠道问题的贡献的特定分子机制.
主要方法:
- 分析了生活在HA的个体的血液生物标志物.
- 建立了对HA暴露的小鼠模型.
- 在低氧条件下使用EGC和MODE-K细胞进行了体外实验.
- 测量了IEB蛋白 (ZO-1,ocludin,claudin-1) 和EGC相关生物标志物 (GFAP,S100β) 的表达水平.
主要成果:
- 在HA居民中发现高水平的EGC相关生物标志物.
- 在HA小鼠中,EGC参与了IEB损伤.
- 缺氧增加了EGCs的S100β分泌.
- 在MODE-K细胞中,S100β直接降低了IEB蛋白表达,损害了屏障功能.
结论:
- 暴露于HA会触发EGC分泌S100β,从而损害IEB.
- 这突出了HA诱导的胃肠道问题的新途径.
- 在高海拔地区,EGCs代表了预防高海拔地区胃肠道疾病的潜在治疗目标.
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