Evidence map›Paper›PMID 27130562›Full record

ArticleSchizophrenia research2016

Metabotropic glutamate receptor 3 (mGlu3; mGluR3; GRM3) in schizophrenia: Antibody characterisation and a semi-quantitative western blot study.

Aintzane García-Bea, Mary A Walker, Thomas M Hyde, Joel E Kleinman, Paul J Harrison, Tracy A Lane

Open access · hybridAbstract readValidation Study
In one paragraph

Article in Schizophrenia research, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
0.7field-weighted citation impact, top 33% 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

13 citing papers in PubMed, 25 citations in OpenAlex.

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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

6 authors at 4 institutions in 2 countries.

Aintzane García-BeaDepartment of Psychiatry, University of Oxford, Oxford, United Kingdom.
Mary A WalkerDepartment of Psychiatry, University of Oxford, Oxford, United Kingdom.
Thomas M HydeLieber Institute for Brain Development, Baltimore, USA; Department of Neurology, Johns Hopkins School of Medicine, Baltimore, USA; Department of Psychiatry & Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, USA.
Joel E KleinmanLieber Institute for Brain Development, Baltimore, USA.
Paul J HarrisonDepartment of Psychiatry, University of Oxford, Oxford, United Kingdom; Oxford Health NHS Foundation Trust, Warneford Hospital, Oxford, United Kingdom.
Tracy A LaneDepartment of Psychiatry, University of Oxford, Oxford, United Kingdom. Electronic address: tracy.lane@psych.ox.ac.uk.
University of Oxford · GBJohns Hopkins University · USLieber Institute for Brain Development · USOxford Health NHS Foundation Trust · GB

Funding

Medical Research Council G0801747
6 · The paper itself

Abstract

backgroundMetabotropic glutamate receptor 3 (mGlu3, mGluR3), encoded by GRM3, is a risk gene for schizophrenia and a therapeutic target. It is unclear whether expression of the receptor is altered in the disorder or related to GRM3 risk genotype. Antibodies used to date to assess mGlu3 in schizophrenia have not been well validated.

objectiveTo characterise six commercially available anti-mGlu3 antibodies for use in human brain, and then conduct a semi-quantitative study of mGlu3 immunoreactivity in schizophrenia.

methodsAntibodies tested using Grm3

resultsOne (out of six) anti-mGlu3 antibodies was fully validated, a C-terminal antibody which detected monomeric (~100kDa) and dimeric (~200kDa) mGlu3. A second, N-terminal, antibody detected the 200kDa band but also produced non-specific bands. Using the C-terminal antibody for western blotting in human brain, mGlu3 immunoreactivity was found to decline with age, and was affected by pH and post mortem interval. There were no differences in monomeric or dimeric mGlu3 immunoreactivity in schizophrenia or in relation to GRM3 genotype. The antibody was not suitable for immunohistochemistry.

interpretationThese data highlight the value of knockout mouse tissue for antibody validation, and the need for careful antibody characterisation. The schizophrenia data show that involvement of GRM3 in the disorder and its genetic risk architecture is not reflected in total membrane mGlu3 immunoreactivity in superior temporal cortex.

Indexed as

AntibodiesAdultAgedAged, 80 and overAnimalsBlotting, WesternBrain ChemistryCell MembraneFemaleHEK293 CellsHumansHydrogen-Ion ConcentrationImmunohistochemistryMaleMice, KnockoutMiddle AgedAntibodiesmetabotropic glutamate receptor 2metabotropic glutamate receptor 3Receptors, Metabotropic GlutamateAntibody validationGroup II metabotropic glutamate receptorHuman brainMethodsPsychosis

Identifiers

PMID27130562
PMCPMC5145804
OpenAlexW2343029969

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.