Positive Allosteric Modulators (PAMs) of Metabotropic Glutamate Receptor 5 (mGluR5) Attenuate Microglial Activation

ISSN: 1996-3181 (Online)
ISSN: 1871-5273 (Print)


Volume 13, 10 Issues, 2014


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CNS & Neurological Disorders - Drug Targets

Formerly: Current Drug Targets - CNS & Neurological Disorders

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Stephen D. Skaper
Department of Pharmaceutical and Pharmacological Sciences
University of Padova
Padova
Italy


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Positive Allosteric Modulators (PAMs) of Metabotropic Glutamate Receptor 5 (mGluR5) Attenuate Microglial Activation

Author(s): Fengtian Xue, Bogdan A. Stoica, Marie Hanscom, Shruti V. Kabadi and Alan I. Faden

Affiliation: Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, USA.

Abstract

Traumatic brain injury causes progressive neurodegeneration associated with chronic microglial activation. Recent studies show that neurodegeneration and neuroinflammation after traumatic brain injury can be inhibited as late as one month in animals by the activation of the metabotropic glutamate receptor 5 in microglia using (RS)-2-chloro-5- hydroxy-phenylglycine. However, the therapeutic potential of this agonist is limited due to its relatively weak potency and brain permeability. To address such concerns, we evaluated the anti-inflammatory activities of several positive allosteric modulators using various in vitro assays, and found that 3,3’-difluorobenzaldazine, 3-cyano-N-(1,3-diphenyl-1H-pyrazol- 5-yl)benzamide and 4-nitro-N-(1-(2-fluorophenyl)-3-phenyl-1H-pyrazol-5-yl)benzamide showed significantly improved potency which makes them potential lead compounds for further development of positive allosteric modulators for the treatment of traumatic brain injury.

Keywords: Metabotropic glutamate receptor 5, microglial activation, neuroinflammation, neuroprotection, positive allosteric modulator, traumatic brain injury.

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Article Details

Volume: 13
Issue Number: 4
First Page: 558
Last Page: 566
Page Count: 9
DOI: 10.2174/18715273113126660199
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