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• W2017010915 abstract "Dual metabotropic glutamate 2/3 (mGlu2/3) receptor agonists have been examined with success in the clinic with positive proof of efficacy in several tests of anxiety and schizophrenia. Moreover, a large body of evidence has accumulated that these drugs have significant neuroprotective potential. An important discussion in the field deals with dissecting effects on mGlu2 versus effects on mGlu3 receptors, which is relevant for the potential use of subtype-selective agonists or allosteric activators. We addressed this issue using mGlu2 and mGlu3 receptor knock-out mice. We used mixed cultures of cortical cells in which astrocytes and neurons were plated at different times and could therefore originate from different mice. Cultures were challenged with NMDA for the induction of excitotoxic neuronal death. The mGlu2/3 receptor agonist, (-)-2-oxa-4-aminocyclo[3.1.0]hexane-4,6-dicarboxylic acid (LY379268), was equally neuroprotective in cultures containing neurons from wild-type, mGlu2-/-, or mGlu3-/- mice. Neuroprotection was instead abolished when astrocytes lacked mGlu3 receptors, unless neuronal mGlu2 receptors were also absent. The latter condition partially restored the protective activity of LY379268. Cultures in which neurons originated from mGlu2-/- mice were also intrinsically resistant to NMDA toxicity. In in vivo experiments, systemic administration of LY379268 protected striatal neurons against NMDA toxicity in wild-type and mGlu2-/- mice but not in mGlu3-/- mice. In addition, LY379268 was protective against nigrostriatal degeneration induced by low doses of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine only in mice lacking mGlu2 receptors. We conclude that neuroprotection by mGlu2/3 receptor agonists requires the activation of astrocytic mGlu3 receptors, whereas, unexpectedly, activation of mGlu2 receptors might be harmful to neurons exposed to toxic insults." @default.
• W2017010915 created "2016-06-24" @default.
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• W2017010915 date "2007-08-01" @default.
• W2017010915 modified "2023-10-12" @default.
• W2017010915 title "The Use of Knock-Out Mice Unravels Distinct Roles for mGlu2 and mGlu3 Metabotropic Glutamate Receptors in Mechanisms of Neurodegeneration/Neuroprotection" @default.
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• W2017010915 doi "https://doi.org/10.1523/jneurosci.1889-07.2007" @default.
• W2017010915 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6673047" @default.
• W2017010915 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17670976" @default.
• W2017010915 hasPublicationYear "2007" @default.
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