Lactobacillus casei prevents impaired barrier function in intestinal epithelial cells
- Authors
- Eun, Chang Soo; Kim, Yong Seok; Han, Dong Soo; Choi, Joo Hyun; Lee, A. Reum; Park, Yoon Kyung
- Issue Date
- Jan-2011
- Publisher
- WILEY
- Keywords
- Lactobacillus casei; epithelial barrier function; Caco-2
- Citation
- APMIS, v.119, no.1, pp.49 - 56
- Indexed
- SCIE
SCOPUS
- Journal Title
- APMIS
- Volume
- 119
- Number
- 1
- Start Page
- 49
- End Page
- 56
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/169315
- DOI
- 10.1111/j.1600-0463.2010.02691.x
- ISSN
- 0903-4641
- Abstract
- The exact effect of probiotics on epithelial barrier function is not well understood. The aims of this study were to evaluate cytokine-induced epithelial barrier dysfunction in intestinal epithelial cells (IECs) and to study the role of probiotics in the prevention of epithelial barrier dysfunction. Caco-2 cells grown on transwell chambers were stimulated with tumor necrosis factor (TNF)-alpha or interferon (IFN)-gamma basolaterally. Probiotic, Lactobacillus casei, was added 1 h before cytokine stimulation. MAPK inhibitors were added 15 min before L. casei stimulation. The electrical resistance and paracellular permeability of Caco-2 monolayers were measured. Distribution of zonula occludens (ZO)-1 protein was assessed by immunofluorescence, and Western blot analyses for ZO-1, p-Akt, and toll-like receptor (TLR) 2 were performed. Both TNF-alpha and IFN-gamma stimulation on Caco-2 cells decreased transepithelial resistance (TER), increased epithelial permeability, and decreased ZO-1 expression of Caco-2 cells. In contrast, pretreatment of L. casei reversed the cytokine-induced dysfunction of TER, epithelial permeability, and ZO-1 expression. Reversal of cytokine-induced dysfunction of TER and intestinal permeability by L. casei was abrogated with MAPK inhibitor treatment. Lactobacillus casei stimulation on Caco-2 cells increased TLR2 and p-Akt expression. Probiotic, L. casei, prevents cytokine-induced epithelial barrier dysfunctions in IECs.
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