Evidence map›Paper›PMID 25096154›Full record

ArticleNeurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics2014

Novel mGluR5 positive allosteric modulator improves functional recovery, attenuates neurodegeneration, and alters microglial polarization after experimental traumatic brain injury.

David J Loane, Bogdan A Stoica, Flaubert Tchantchou, Alok Kumar, James P Barrett, Titilola Akintola, Fengtian Xue, P Jeffrey Conn, Alan I Faden

Open access · greenAbstract read
In one paragraph

Article in Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
5.4field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

47 citing papers in PubMed, 79 citations in OpenAlex.

  1. Article
  2. Review
  3. Development and validation of a nomogram for predicting mortality in patients with acute severe traumatic brain injury: A retrospective analysis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2024
    Article
  4. Review
  5. Article
  6. Article
  7. Review
  8. Review
  9. Review
  10. Article
  11. Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 2 institutions in 1 country.

David J LoaneDepartment of Anesthesiology and Center for Shock, Trauma, and Anesthesiology Research (STAR), University of Maryland School of Medicine, Health Sciences Facility II (HSFII), #S247, 20 Penn Street, Baltimore, MD, 21201, USA.
Bogdan A Stoica
Flaubert Tchantchou
Alok Kumar
James P Barrett
Titilola Akintola
Fengtian Xue
P Jeffrey Conn
Alan I Faden
University of Maryland, Baltimore · USVanderbilt University Medical Center · US

Funding

REGULATION OF SIGNALING BY MGLUR5R01MH062646 · NIMH · VANDERBILT UNIVERSITY · PI P Jeffrey Conn, COLLEEN M NISWENDER · 2001 to 2026
$10.9M
MODULATION OF INJURY BY METABOTROPIC GLUTAMATE RECEPTORSR01NS037313 · NINDS · UNIVERSITY OF MARYLAND BALTIMORE · PI FADEN, ALAN IRA · 1999 to 2019
$5.8M
Functions of Metabotropic Glutamate Receptor SubtypesR37NS031373 · NINDS · VANDERBILT UNIVERSITY · PI CONN, P JEFFREY · 2014 to 2020
$3.5M
NIMH NIH HHS R01 MH062646NINDS NIH HHS 5R01NS037313NINDS NIH HHS R01 NS037313NINDS NIH HHS R37 NS031373
6 · The paper itself

Abstract

Traumatic brain injury (TBI) causes microglial activation and related neurotoxicity that contributes to chronic neurodegeneration and loss of neurological function. Selective activation of metabotropic glutamate receptor 5 (mGluR5) by the orthosteric agonist (RS)-2-chloro-5-hydroxyphenylglycine (CHPG), is neuroprotective in experimental models of TBI, and has potent anti-inflammatory effects in vitro. However, the therapeutic potential of CHPG is limited due to its relatively weak potency and brain permeability. Highly potent, selective and brain penetrant mGluR5 positive allosteric modulators (PAMs) have been developed and show promise as therapeutic agents. We evaluated the therapeutic potential of a novel mGluR5 PAM, VU0360172, after controlled cortical impact (CCI) in mice. Vehicle, VU0360172, or VU0360172 plus mGluR5 antagonist (MTEP), were administered systemically to CCI mice at 3 h post-injury; lesion volume, hippocampal neurodegeneration, microglial activation, and functional recovery were assessed through 28 days post-injury. Anti-inflammatory effects of VU0360172 were also examined in vitro using BV2 and primary microglia. VU0360172 treatment significantly reduced the lesion, attenuated hippocampal neurodegeneration, and improved motor function recovery after CCI. Effects were mediated by mGluR5 as co-administration of MTEP blocked the protective effects of VU0360172. VU0360172 significantly reduced CD68 and NOX2 expression in activated microglia in the cortex at 28 days post-injury, and also suppressed pro-inflammatory signaling pathways in BV2 and primary microglia. In addition, VU0360172 treatment shifted the balance between M1/M2 microglial activation states towards an M2 pro-repair phenotype. This study demonstrates that VU0360172 confers neuroprotection after experimental TBI, and suggests that mGluR5 PAMs may be promising therapeutic agents for head injury.

Indexed as

Allosteric RegulationAnimalsBrain InjuriesCell CountCerebral CortexDisease Models, AnimalGlycineHippocampusMaleMembrane GlycoproteinsMiceMice, Inbred C57BLMicrogliaMotor ActivityNADPH Oxidase 2NADPH Oxidases2-chloro-5-hydroxyphenylglycine3-((2-methyl-1,3-thiazol-4-yl)ethynyl)pyridineCybb protein, mouseGlycineGrm5 protein, mouseMembrane GlycoproteinsNADPH Oxidase 2NADPH OxidasesNeuroprotective AgentsNitric Oxide Synthase Type IINos2 protein, mousePhenylacetatesPyridinesReceptor, Metabotropic Glutamate 5Thiazoles

Identifiers

PMID25096154
PMCPMC4391388
OpenAlexW2079730381

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.