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10.1523/JNEUROSCI.2295-10.2010 http://scihub22266oqcxt.onion/10.1523/JNEUROSCI.2295-10.2010 20631191!6632428!20631191     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=20631191&cmd=llinks): Failed to open stream: HTTP request failed! 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Glucocorticoid protection of oligodendrocytes against excitotoxin involving hypoxia-inducible factor-1alpha in a cell-type-specific manner |pdf=|usr=}}{{20631191}} gab.com Text Glucocorticoid protection of oligodendrocytes against excitotoxin involving hypoxia-inducible factor-1alpha in a cell-type-specific manner JO: J Neurosci http://www.kidney.de/pget.php?&tw=1&pmid=20631191 #FOAvip Glucocorticoids are commonly used in treating diseases with white matter lesions, including demyelinating diseases and spinal cord injury (SCI). However, glucocorticoids are ineffective in gray matter injuries, such as head injury and stroke. The differential glucocorticoid effects in white and gray matter injuries are unclear. We report here a novel mechanism of methylprednisolone (MP), a synthetic glucocorticoid widely used for treating multiple sclerosis and SCI, in protecting oligodendrocytes (OLGs) against AMPA-induced excitotoxicity, which has been implicated in the white matter injuries and diseases. The cytoprotective action of MP in OLGs is causally related to its upregulation of a neuroprotective cytokine erythropoietin (Epo). MP transactivation of Epo expression involves dual transcription factors: glucocorticoid receptor (GR) and hypoxia-inducible factor-1alpha (HIF-1alpha). Coimmunoprecipitation, chromatin immunoprecipitation analysis, yeast two-hybrid analysis, and structure modeling of three-dimensional protein-protein interactions confirm that MP induces interaction between GR DNA binding domain and HIF-1alpha PAS domain, with subsequent recruitment of HIF-1beta to transactivate Epo expression in OLGs. In contrast, MP activates GR but does not induce GR-HIF-1alpha interaction, HIF-1alpha binding to Epo enhancer/promoter, or Epo expression in cultured cortical neurons. The OLG-specific GR-HIF-1alpha transactivation of Epo provides novel insights into the development of more effective therapies for diseases affecting the white matter. Twit Text FOAVip Glucocorticoid protection of oligodendrocytes against excitotoxin involving hypoxia-inducible factor-1alpha in a cell-type-specific manner ????J Neurosci http://www.kidney.de/pget.php?&tw=1&pmid=20631191 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=20631191 #FOAvip English Wikipedia <ref>{{Cite pmid|20631191}}</ref> Glucocorticoid protection of oligodendrocytes against excitotoxin involving hypoxia-inducible factor-1alpha in a cell-type-specific manner #MMPMID20631191 Sun YY; Wang CY; Hsu MF; Juan SH; Chang CY; Chou CM; Yang LY; Hung KS; Xu J; Lee YH; Hsu CY J Neurosci 2010[Jul]; 30 (28): 9621-30 PMID20631191show ga Glucocorticoids are commonly used in treating diseases with white matter lesions, including demyelinating diseases and spinal cord injury (SCI). However, glucocorticoids are ineffective in gray matter injuries, such as head injury and stroke. The differential glucocorticoid effects in white and gray matter injuries are unclear. We report here a novel mechanism of methylprednisolone (MP), a synthetic glucocorticoid widely used for treating multiple sclerosis and SCI, in protecting oligodendrocytes (OLGs) against AMPA-induced excitotoxicity, which has been implicated in the white matter injuries and diseases. The cytoprotective action of MP in OLGs is causally related to its upregulation of a neuroprotective cytokine erythropoietin (Epo). MP transactivation of Epo expression involves dual transcription factors: glucocorticoid receptor (GR) and hypoxia-inducible factor-1alpha (HIF-1alpha). Coimmunoprecipitation, chromatin immunoprecipitation analysis, yeast two-hybrid analysis, and structure modeling of three-dimensional protein-protein interactions confirm that MP induces interaction between GR DNA binding domain and HIF-1alpha PAS domain, with subsequent recruitment of HIF-1beta to transactivate Epo expression in OLGs. In contrast, MP activates GR but does not induce GR-HIF-1alpha interaction, HIF-1alpha binding to Epo enhancer/promoter, or Epo expression in cultured cortical neurons. The OLG-specific GR-HIF-1alpha transactivation of Epo provides novel insights into the development of more effective therapies for diseases affecting the white matter. |Analysis of Variance[MESH] |Animals[MESH] |Cell Death/*drug effects[MESH] |Cells, Cultured[MESH] |Chromatin Immunoprecipitation[MESH] |Computer Simulation[MESH] |Erythropoietin/genetics/metabolism[MESH] |Hypoxia-Inducible Factor 1, alpha Subunit/genetics/*metabolism[MESH] |Immunoprecipitation[MESH] |Methylprednisolone/*pharmacology[MESH] |Oligodendroglia/*drug effects/metabolism[MESH] |Rats[MESH] |Rats, Sprague-Dawley[MESH] |Reverse Transcriptase Polymerase Chain Reaction[MESH]Glucocorticoid protection of oligodendrocytes against excitotoxin invo(epmc).pdf DeepDyve Pubget Overpricing