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Regulation of stress-associated scaffold proteins JIP1 and JIP3 on the c-Jun NH2-terminal kinase in ischemia-reperfusion.

Authors: Xu, Bing  Zhou, Yaling  O, Karmin  Choy, Patrick C  Pierce, Grant N  Siow, Yaw L 
Citation: Xu B, etal., Can J Physiol Pharmacol. 2010 Nov;88(11):1084-92. doi: 10.1139/y10-088.
Pubmed: (View Article at PubMed) PMID:21076496
DOI: Full-text: DOI:10.1139/y10-088

Ischemia-reperfusion (IR)-induced cell apoptosis involves the activation of c-Jun NH2-terminal kinase (JNK). The activation of JNK requires the presence of scaffold proteins called JNK-interacting proteins (JIP), which bind several members of a signaling cascade for proper signaling specificity. In this study, the expression of scaffold proteins JIP1 and JIP3 and their roles in the regulation of JNK activity were investigated in simulated IR in a cell model (H9c2). JIP1 protein expression was significantly decreased, whereas JIP3 protein expression was increased in IR H9c2 cells. Adenovirus-induced overexpression of JIP1 reduced IR-induced JNK activity and apoptosis. Conversely, overexpression of JIP3 increased JNK activity and apoptosis following IR. Depletion of endogenous JIP1 by siRNA treatment increased the IR-induced JNK activity, whereas siRNA-mediated depletion of endogenous JIP3 inhibited JNK activity. These results suggest that JIP1 and JIP3 play important roles in the activation of JNK during simulated IR challenge in H9c2 cells.


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CRRD Object Information
CRRD ID: 13673827
Created: 2018-06-23
Species: All species
Last Modified: 2018-06-23
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.