Title : c-Jun N-terminal kinase mediates disassembly of apical junctions in model intestinal epithelia.

Pub. Date : 2009 Jul 1

PMID : 19502798






7 Functional Relationships(s)
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1 We show that rapid AJ/TJ disassembly triggered by extracellular calcium depletion of T84 and SK-CO15 cell monolayers was accompanied by activation (phosphorylation) of JNK, and prevented by pharmacological inhibitors of JNK. Calcium mitogen-activated protein kinase 8 Homo sapiens
2 We show that rapid AJ/TJ disassembly triggered by extracellular calcium depletion of T84 and SK-CO15 cell monolayers was accompanied by activation (phosphorylation) of JNK, and prevented by pharmacological inhibitors of JNK. Calcium mitogen-activated protein kinase 8 Homo sapiens
3 JNK1 but not JNK2 was found to colocalize with intercellular junctions, and siRNA-mediated downregulation of JNK1 attenuated the TJ/AJ disruption caused by calcium depletion. Calcium mitogen-activated protein kinase 8 Homo sapiens
4 JNK1 but not JNK2 was found to colocalize with intercellular junctions, and siRNA-mediated downregulation of JNK1 attenuated the TJ/AJ disruption caused by calcium depletion. Calcium mitogen-activated protein kinase 8 Homo sapiens
5 JNK inhibition also blocked formation of characteristic contractile F-actin rings in calcium-depleted epithelial cells, suggesting that JNK regulates junctions by remodeling the actin cytoskeleton. Calcium mitogen-activated protein kinase 8 Homo sapiens
6 JNK inhibition also blocked formation of characteristic contractile F-actin rings in calcium-depleted epithelial cells, suggesting that JNK regulates junctions by remodeling the actin cytoskeleton. Calcium mitogen-activated protein kinase 8 Homo sapiens
7 In this role JNK acts downstream of the actin-reorganizing Rho-dependent kinase (ROCK), since ROCK inhibition abrogated JNK phosphorylation and TJ/AJ disassembly after calcium depletion. Calcium mitogen-activated protein kinase 8 Homo sapiens