This protocol details the establishment of enteroids, a three-dimensional intestinal model, from fetal intestinal tissue. Immunofluorescent imaging of epithelial biomarkers was used for model characterization. Apical exposure of lipopolysaccharides, a bacterial endotoxin, using microinjection technique induced epithelial permeability in a dose-dependent manner measured by the leakage of fluorescent dextran.
Llerena, A., Urmi, S., Amin, J., Cha, B., Ho, T. T. Testing Epithelial Permeability in Fetal Tissue-Derived Enteroids. J. Vis. Exp. (184), e64108, doi:10.3791/64108 (2022).