AMPK Activation Promotes Tight Junction Assembly in Intestinal Epithelial Caco-2 Cells
Abstract
:1. Introduction
2. Results
2.1. Deletion of both AMPKα1 and AMPKα2 is Necessary to Abrogate AMPK Signaling in Caco-2 Cells
2.2. Disruption of AMPK in Caco-2 cells does not Alter the Integrity of Tight Junction at Steady-State
2.3. Deletion of AMPK Prevents Calcium-Induced Reassembly of Tight Junctions in Caco-2 Cells
2.4. Acute Pharmacological Inhibition of AMPK Prevents Calcium-Induced Reassembly of Tight Junctions in Caco-2 Cells
2.5. Pharmacological AMPK Activation Enhances the Reassembly of Tight Junctions
3. Discussion
4. Materials and Methods
4.1. Reagents and Antibodies
4.2. Generation of AMPK Deficient Caco-2 Cells using CRISPR-Cas9 Gene Editing System
4.3. Cell Culture and Calcium Switch Assay
4.4. TEER and Paracellular Permeability Measurements
4.5. Immunofluorescence and Quantification of ZO-1
4.6. Electron Microscopy
4.7. Western Blotting
4.8. Statistical Analysis
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Abbreviations
ACC | Acetyl CoA carboxylase |
ADaM | Allosteric drug and metabolite |
AMPK | AMP-activated protein kinase |
CaMKKβ | Ca2+ calmodulin-activated protein kinase kinase beta |
CRISPR/Cas9 | Clustered regularly interspaced short palindromic repeats/associated protein 9 endonuclease |
FITC | Fluorescein-5-isothiocyanate |
GFP | Green fluorescent protein |
GIV | G-alpha interacting vesicle associated protein |
LKB1 | Liver kinase B1 |
MDCK | Madin-Darby canine kidney |
MLC2 | Myosin II regulatory light chain |
mTOR | Mammalian target of rapamycin |
PKC | Proteins kinase C |
SCFAs | Short chain fatty acids |
TEER | Trans-epithelial electrical resistance |
ZO-1 | Zonula occludens 1 |
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Olivier, S.; Leclerc, J.; Grenier, A.; Foretz, M.; Tamburini, J.; Viollet, B. AMPK Activation Promotes Tight Junction Assembly in Intestinal Epithelial Caco-2 Cells. Int. J. Mol. Sci. 2019, 20, 5171. https://0-doi-org.brum.beds.ac.uk/10.3390/ijms20205171
Olivier S, Leclerc J, Grenier A, Foretz M, Tamburini J, Viollet B. AMPK Activation Promotes Tight Junction Assembly in Intestinal Epithelial Caco-2 Cells. International Journal of Molecular Sciences. 2019; 20(20):5171. https://0-doi-org.brum.beds.ac.uk/10.3390/ijms20205171
Chicago/Turabian StyleOlivier, Séverine, Jocelyne Leclerc, Adrien Grenier, Marc Foretz, Jérôme Tamburini, and Benoit Viollet. 2019. "AMPK Activation Promotes Tight Junction Assembly in Intestinal Epithelial Caco-2 Cells" International Journal of Molecular Sciences 20, no. 20: 5171. https://0-doi-org.brum.beds.ac.uk/10.3390/ijms20205171