NDLI: Nocodazole increases the ERK activity to enhance MKP-1 expression which inhibits p38 activation induced by TNF-α

Content Provider	Springer Nature Link
Author	Guo, Xiangrui Zhang, Xueying Li, Yajing Guo, Yuanyuan Wang, Jing Li, Yan Shen, Beifen Sun, Dejun Zhang, Jiyan
Copyright Year	2012
Abstract	The mitogen-activated protein kinase p38 plays key roles in cell progression, differentiation, inflammation, and apoptosis. p38 is activated by a variety of extracellular stimuli such as UV and proinflammatory cytokine tumor necrosis factor alpha (TNF-α). It has been demonstrated that destruction of microtubules with different reagents led to impaired p38 activation in response to various extracellular stimuli. However, several other groups have reported that microtubule-interfering agents stimulate the activation of MAPK superfamily members including p38 in certain cell context. The discrepancy suggests that destruction of microtubules stimulates the activation of MAPK superfamily members and thereby induces certain feedback inhibitor(s) of p38 signaling. In this article, we report that nocodazole, a widely used microtubule-interfering agent, antagonized UV- or TNF-α-induced p38 activation, even though this drug by itself weakly activated p38. The RNA synthesis inhibitor actinomycin D, but not p38-specific inhibitor SB203580, reversed the inhibitory effect of nocodazole on TNF-α-induced p38 activation. Nocodazole also weakly activated JNK, but significantly activated ERK. The inhibition by nocodazole of TNF-α-induced p38 activation was abolished by ERK-specific inhibitor U0126. Further exploration revealed that nocodazole significantly enhanced MKP-1 expression via the ERK activity. Thus, nocodazole increases the ERK activity to enhance MKP-1 expression which inhibits p38 activation induced by TNF-α.
Starting Page	373
Ending Page	380
Page Count	8
File Format	PDF
ISSN	03008177
Journal	Molecular and Cellular Biochemistry
Volume Number	364
Issue Number	1-2
e-ISSN	15734919
Language	English
Publisher	Springer US
Publisher Date	2012-02-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Microtubules Nocodazole p38 MKP-1 ERK Medical Biochemistry Oncology Biochemistry Cardiology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Medicine Clinical Biochemistry Molecular Biology

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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