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Human Molecular Genetics
Article . 2009 . Peer-reviewed
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p38 Mitogen-activated protein kinase stabilizes SMN mRNA through RNA binding protein HuR

Authors: Faraz, Farooq; Sylvia, Balabanian; Xuejun, Liu; Martin, Holcik; Alex, MacKenzie;

p38 Mitogen-activated protein kinase stabilizes SMN mRNA through RNA binding protein HuR

Abstract

Spinal muscle atrophy (SMA) is an autosomal recessive neurodegenerative disease which is characterized by the loss of alpha motor neurons resulting in progressive muscle atrophy. Reduced amount of functional survival motor neuron (SMN) protein due to mutations or deletion in the SMN1 gene is the cause of SMA. A potential treatment strategy for SMA is to upregulate levels of SMN protein originating from the SMN2 gene compensating in part for the absence of functional SMN1 gene. Although there exists a sizeable literature on SMN2 inducing compounds, there is comparatively less known about the signaling pathways which modulate SMN levels. Here, we report a significant induction in SMN mRNA and protein following p38 activation by Anisomycin. We demonstrate that Anisomycin activation of p38 causes a rapid cytoplasmic accumulation of HuR, a RNA binding protein which binds to and stabilizes the AU-rich element within the SMN transcript. The stabilization of SMN mRNA, rather than transcriptional induction results in an increase in SMN protein. Our demonstration of SMN protein regulation through the p38 pathway and the role of HuR in this modulation may help in the identification and characterization of p38 pathway activators as potential therapeutic compounds for the treatment of SMA.

Keywords

Neurons, Cytoplasm, Reverse Transcriptase Polymerase Chain Reaction, RNA Stability, Blotting, Western, Gene Expression, RNA-Binding Proteins, Immunohistochemistry, Survival of Motor Neuron 1 Protein, Cell Line, ELAV-Like Protein 1, Enzyme Activation, ELAV Proteins, Cell Line, Tumor, Antigens, Surface, Humans, RNA, Messenger, 3' Untranslated Regions, Anisomycin, Signal Transduction

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
83
Top 10%
Top 10%
Top 10%
bronze