Focal adhesion kinase regulates intestinal epithelial barrier function via redistribution of tight junction
Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease, ISSN: 0925-4439, Vol: 1832, Issue: 1, Page: 151-159
2013
- 50Citations
- 54Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Metrics Details
- Citations50
- Citation Indexes50
- 50
- CrossRef37
- Captures54
- Readers54
- 54
Article Description
Disruption of epithelial barrier function was identified as one of the pathologic mechanisms in inflammatory bowel diseases (IBD). Epithelial barrier consists of various intercellular junctions, in which the tight junction (TJ) is an important component. However, the regulatory mechanism of tight junction is still not clear. Here we examined the role of focal adhesion kinase (FAK) in the epithelial barrier function on Caco-2 monolayers using a specific FAK inhibitor, PF-573, 228 (PF-228). We found that the decrease of transepithelial resistance and the increase of paracellular permeability were accompanied with the inhibition of autophosphorylation of FAK by PF-228 treatment. In addition, PF-228 inhibited the FAK phosphorylation at Y576/577 on activation loop by Src, suggesting Src-dependent regulation of FAK in Caco-2 monolayers. In an ethanol-induced barrier injury model, PF-228 treatment also inhibited the recovery of transepithelial resistance as well as these phosphorylations of FAK. In a sucrose gradient ultracentrifugation, FAK co-localized with claudin-1, an element of the TJ complex, and they co-migrate after ethanol-induced barrier injury. Immunofluorescence imaging analysis revealed that PF-228 inhibited the FAK redistribution to the cell border and reassembly of TJ proteins in the recovery after ethanol-induced barrier injury. Finally, knockdown of FAK by siRNA resulted in the decrease of transepithelial resistance. These findings reveal that activation of FAK is necessary for maintaining and repairing epithelial barrier in Caco-2 cell monolayer via regulating TJ redistribution.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0925443912002293; http://dx.doi.org/10.1016/j.bbadis.2012.10.006; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84868538987&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/23064287; https://linkinghub.elsevier.com/retrieve/pii/S0925443912002293; https://dx.doi.org/10.1016/j.bbadis.2012.10.006
Elsevier BV
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