在宿主中表皮细胞-巨细胞交叉反应对人类的Campylobacter jejuni感染的反应
Khaled Abdelaziz1,2, Shreeya Sharma1, Mostafa Naguib1,3
1Department of Animal and Veterinary Science, Clemson University, Clemson, SC 29634, USA.
Microorganisms
|December 31, 2025
概括
肠道细胞的Campylobacter jejuni感染会根据细菌剂量不同地影响巨细胞的活动. 低剂量激活巨细胞,而高剂量抑制它们的功能,帮助细菌逃避.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 胃肠病学 胃肠病学
背景情况:
- 单细胞系模型不足以代表宿主对Campylobacter jejuni.复杂的免疫反应.
- 研究肠道上皮细胞和巨细胞之间的相互作用为C. jejuni动态提供了更全面的模型.
研究的目的:
- 为了研究C. jejuni感染的肠上皮细胞 (HT-29) 和巨细胞 (RAW 264.7) 之间的体外相互作用.
- 确定感染HT-29细胞中的可溶性因子如何影响巨细胞的活性,包括氧化的产生,迁移,细胞,杀死细菌以及细胞因子/化学因子的表达.
主要方法:
- HT-29细胞感染了C. jejuni,感染次数 (MOI) 为10和50.
- 来自受感染的HT-29细胞的超活体被用于治疗RAW 264.7巨细胞.
- 评估了巨细胞的活性,细胞因子 (IL-6,IL-1β,TNF-α),化学因子 (CCL2) 和氧化 (NO) 的产生.
主要成果:
- 在10 MOI的感染诱导了HT-29细胞的IFN-γ产生.
- 来自10个MOI感染细胞的超活体增强了巨细胞的NO生产,迁移,细胞和IL-6,TNF-α,CCL2表达.
- 来自50个MOI感染细胞的超剂抑制了巨细胞NO的产生和细胞分裂,没有观察到明显的细菌杀死.
结论:
- 受到C. jejuni感染的肠细胞中的可溶性因子以剂量依赖的方式调节巨细胞功能.
- 高剂量的C. jejuni可能通过抑制巨细胞活动来促进免疫逃避.
- 坎皮洛巴克特可以逃避被激活的巨细胞杀死,强调需要进一步的机制研究.
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