二形酸盐缓解了感染EHEC的IPEC-J2细胞的炎症
Ying Lin1, Jun-Lei Zhai1, Ya-Ting Wang1
1College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Veterinary microbiology
|February 16, 2024
概括
二形酸盐 (KDF) 降低了与大肠杆菌挑战的猪的肠道炎症. 通过NF-κB通路,KDF通过降低促炎细胞因子和增强抗炎细胞因子来缓解炎症.
科学领域:
- 动物科学动物科学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 二形酸盐 (KDF) 已知在断奶小猪中具有抗微生物和促进生长的作用.
- 关于KDF的研究主要集中在生长性能上,对其对肠道健康机制的影响的理解有限.
研究的目的:
- 调查KDF在减轻猪小肠上皮细胞 (IPEC-J2) 中肠道炎症中的作用,这些细胞被肠道出血性大肠杆菌 (EHEC) 挑战.
主要方法:
- 用KDF处理IPEC-J2细胞和/或用EHEC进行挑战.
- 确定了最佳度 (0.125 mg/mlKDF6小时) 和挑战时间 (EHEC4小时).
- 分析了细胞活力,基因表达 (SGLT1,SGLT3,GLUT2,Claudin-1,Occludin,TGF-β,IL-1β,TNF,IL-8,TLR4) 以及蛋白质表达 (ZO-1,p-NF-κB).
主要成果:
- 单独使用KDF治疗增加了细胞活力和TGF-β表达,同时降低了IL-1β.
- 虽然EHEC挑战降低了细胞活力和紧结蛋白 (Claudin-1,Occludin) 和TGF-β的表达,但增加了促炎细胞因子 (IL-1β,TNF,IL-8,TLR4) 和NF-κB酸化.
- 在受到EHEC挑战的细胞中进行KDF预处理会降低亲炎性标记物 (IL-1β,TNF,IL-8,TLR4,p-NF-κB) 并增加抗炎性TGF-β和Occludin表达.
结论:
- 二形酸盐 (KDF) 在改善IPEC-J2细胞中EHEC诱导的肠炎症方面表现出有益作用.
- 通过调节NF-κB信号通路,KDF通过抑制促炎细胞因子和增强抗炎细胞因子来减轻炎症.
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