Abstract:
INTRODUCTION:The fast actions of the excitatory neurotransmitter glutamate are mediated by glutamate-gated ion channels (ionotropic Glu receptors). Metabotropic glutamate receptors (mGlus) are coupled to second messenger pathways via G proteins and modulate glutamatergic and GABAergic neurotransmission. Of the eight different types of mGlus (mGlu1-mGlu8), mGlu4, mGlu6, mGlu7 and mGlu8 are members of group III. Except for mGlu6, group III receptors are generally located presynaptically and regulate neurotransmitter release. Because of their role in modulating excitatory neurotransmission, mGlus are attractive targets for therapies aimed at treating anxiety disorders. AREAS COVERED:In this review, the authors discuss the role of mGlu4 and mGlu8 in anxiety disorders. They also discuss how mGlu4 and mGlu8 have distinct expression patterns in the brain, which might have related functions. Finally, the authors discuss how compounds that target more than one mGlu receptor might be therapeutically more effective. EXPERT OPINION:mGlu4 might compensate for mGlu8 deficiency, and deficiency of both receptors might result in a more pronounced phenotype than deficiency of either receptor alone. The distinct and overlapping anatomical distribution and functions of mGlu4 and mGlu8 suggest that both receptors, either individually or combined, are attractive therapeutic targets in anxiety disorders, post-traumatic stress disorder, Parkinson's disease, and multiple sclerosis.
journal_name
Expert Opin Investig Drugsjournal_title
Expert opinion on investigational drugsauthors
Raber J,Duvoisin RMdoi
10.1517/13543784.2014.986264subject
Has Abstractpub_date
2015-04-01 00:00:00pages
519-28issue
4eissn
1354-3784issn
1744-7658journal_volume
24pub_type
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journal_title:Expert opinion on investigational drugs
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journal_title:Expert opinion on investigational drugs
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