The effects of IL-1 beta on intestinal epithelial barrier permeability / 国际儿科学杂志

ABSTRACT

Objective Inflammatory bowel disease is an important chronic gastrointestinal disease of childhood and adolescence.Intestinal mucosa barrier damage plays an important role in its pathogenesis.This study attempts to use IL-1β stimulating Caco-2 cell monolayer simulates inflammatory intestinal epithelial barrier in vitro,provides the basis for studying the pathogenesis and treatment of IBD.Methods Caco-2 cells were cultivated in vitro until the 21st day to simulate intestinal epithelial cell monolayer barrier.The cells of inflammation group one were disposed with IL-1β for 2 h since the 5th day and detected TEER every other day until the 21st day.The cells of inflammation group two were disposed with IL-1 β at the 18th day for 0,12,24,48,72h, and detected TEER respectively.Normal control group cells were cultured with common medium and detected TEER at the corresponding time point.Results The TEER of Caco-2 cells gradually increased from the 5th to 15th days,reached 600Ω·cm2 in the 15th day of a plateau until to the 21st day.Since the 5th day,the TEER of inflammation group one were all lower than normal group,and still to the 21st day ＜ 500Ω·cm2.Inflammation group two shows the time dependence TEER gradually reduce,peaked at 48 hours,then a slight increase in 72 hours.Conclusion The Caco-2 cells cultured for 2 ～ 3 weeks can form intestinal epithelial monolayer barrier with polarity,then treated with IL-1 β can manufacture inflammatory intestinal epithelial barrier model in vitro.