Login

Journal Image
CNS & Neurological Disorders - Drug Targets
(Formerly Current Drug Targets - CNS & Neurological Disorders)
ISSN (Print): 1871-5273
ISSN (Online): 1996-3181
VOLUME: 13
ISSUE: 4
DOI: 10.2174/18715273113126660199      Price:  $58









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

img
Author(s): Fengtian Xue, Bogdan A. Stoica, Marie Hanscom, Shruti V. Kabadi and Alan I. Faden
Pages 558-566 (9)
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.
Affiliation:
Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, USA.