RGD Reference Report - Potential signalling pathways underlying corticotrophin-releasing hormone-mediated neuroprotection from excitotoxicity in rat hippocampus. - Rat Genome Database

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Potential signalling pathways underlying corticotrophin-releasing hormone-mediated neuroprotection from excitotoxicity in rat hippocampus.

Authors: Elliott-Hunt, CR  Kazlauskaite, J  Wilde, GJ  Grammatopoulos, DK  Hillhouse, EW 
Citation: Elliott-Hunt CR, etal., J Neurochem 2002 Feb;80(3):416-25.
RGD ID: 704423
Pubmed: PMID:11908464   (View Abstract at PubMed)

In several neurological disorders including cerebral ischaemia, glutamate has been implicated as a neurotoxic agent in the mechanisms leading to neuronal cell death. The role of corticotrophin-releasing hormone (CRH), the 41-amino acid peptide, which activates the HPA axis in response to stressful stimuli, remains controversial. In this study, we report that CRH in low physiological concentrations (2 pM), prevented glutamate-induced neurotoxicity via receptor-mediated mechanisms when administered to organotypic hippocampal cultures both during and after the glutamate-induced insult. Detailed investigations on the mechanisms mediating this neuroprotective effect showed that activation of the adenylate cyclase pathway and induction of MAP kinase phosphorylation mediate the CRH action. In addition we showed that CRH can inhibit the phosphorylation of JNK/SAPK by glutamate. Most importantly, we showed that CRH can afford neuroprotection against neurotoxicity up to 12 h following the insult, suggesting that CRH is acting at a late stage in the neuronal death cycle, and this might be important in the development of novel neuroprotective agents in order to improve neuronal survival following the insult.



Phenotype Annotations    Click to see Annotation Detail View

Mammalian Phenotype

Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
CrhRatabnormal apoptosis  IDA  RGD 
Objects Annotated

Genes (Rattus norvegicus)
Crh  (corticotropin releasing hormone)

Objects referenced in this article
Gene CRH corticotropin releasing hormone Homo sapiens

Additional Information