人类iPSC衍生的肠上皮单层对微生物毒素LPS和尼日里的炎症反应
Germaine Aalderink1, Hugo Brouwer2, Jingxuan Wang2
1Division of Toxicology, Wageningen University and Research, Wageningen, The Netherlands. germaine.aalderink@wur.nl.
Archives of toxicology
|October 8, 2025
概括
与Caco-2细胞相比,人类诱导的多能干细胞衍生肠上皮细胞 (iPSC-IECs) 为研究肠道炎症提供了更敏感的模型. iPSC-IECs准确地模拟了微生物毒素的体内炎症反应.
科学领域:
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 肠上皮作为一个关键的屏障,调节炎症反应.
- 目前的体外模型,如Caco-2细胞,由于缺失的通路,在体内不充分复制炎症反应.
- 基于人类诱导的多能干细胞 (iPSC) 的模型为研究肠道炎症提供了一个有希望的替代方案.
研究的目的:
- 为了比较IPSC衍生的肠上皮细胞 (IECs) 与Caco-2细胞在接触微生物毒素时的炎症反应.
- 评估iPSC-IECs作为人类肠道炎症更准确的体外模型的适用性.
主要方法:
- 在没有3D培养的情况下,iPSCs被分化为肠细胞,杯状细胞和帕内特样细胞.
- 分化细胞形成单层屏障,并暴露于脂多糖 (LPS) 和尼日里辛.
- 测量和比较iPSC-IECs和Caco-2细胞之间的体电阻 (TEER),细胞因子表达和细胞因子分泌.
主要成果:
- 在LPS和尼日里辛暴露后,iPSC-IECs显著降低了TEER,并使促炎性细胞因子分泌 (IL-6,IL-8,TNF-α) 增加了十倍.
- 在iPSC-IEC中观察到这些细胞因子的mRNA表达增加.
- 在相同的条件下,Caco-2细胞在TEER,细胞因子分泌或mRNA表达中没有显著变化.
结论:
- 与Caco-2细胞相比,iPSC-IECs是研究人类肠上皮质炎症反应的更敏感和生理相关的体外模型.
- 这种基于iPSC的模型有效模拟炎症干扰,为胃肠病学和免疫学研究提供了宝贵的工具.
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