Evidence map›Paper›PMID 27328999›Full record

ArticlePsychological medicine2016

Cortical GABA markers identify a molecular subtype of psychotic and bipolar disorders.

D W Volk, A R Sampson, Y Zhang, J R Edelson, D A Lewis

Abstract read
In one paragraph

Article in Psychological medicine, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 3 pooled it
12.3field-weighted citation impact, top 2% 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

33 citing papers in PubMed, 3 syntheses or guidelines pooled it, 57 citations in OpenAlex.

  1. Pooled it
  2. Pre-frontal parvalbumin interneurons in schizophrenia: a meta-analysis of post-mortem studies.Journal of neural transmission (Vienna, Austria : 1996) · 2019
    Pooled it
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  5. The role ofEpigenetics · 2026
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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

5 authors at 1 institution in 1 country.

D W VolkDepartment of Psychiatry,University of Pittsburgh,Pittsburgh, PA,USA.
A R SampsonDepartment of Statistics,University of Pittsburgh,Pittsburgh, PA,USA.
Y ZhangDepartment of Statistics,University of Pittsburgh,Pittsburgh, PA,USA.
J R EdelsonDepartment of Psychiatry,University of Pittsburgh,Pittsburgh, PA,USA.
D A LewisDepartment of Psychiatry,University of Pittsburgh,Pittsburgh, PA,USA.
University of Pittsburgh · US

Funding

Statistics and Data Management CoreP50MH103204 · NIMH · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI OLSON, CARL ROGER · 2014 to 2018
$10.8M
Schizophrenia and synaptic pruning: Circuit specificity and functional consequencesR01MH051234 · NIMH · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI LEWIS, DAVID A · 1995 to 2020
$8.5M
SCHIZOPHRENIA AND CORTICAL DOPAMINE/GABA INTERACTIONSR01MH043784 · NIMH · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI LEWIS, DAVID A · 1988 to 2023
$7.2M
GABA Neurons and Cortical Circuitry in SchizophreniaR37MH043784 · NIMH · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI LEWIS, DAVID A · 2001 to 2010
$6.8M
Disrupted Ontogeny of Cortical GABA Neurons in SchizophreniaR01MH100066 · NIMH · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI VOLK, DAVID W · 2014 to 2018
$2.2M
NIMH NIH HHS P50 MH103204NIMH NIH HHS R01 MH043784NIMH NIH HHS R01 MH051234NIMH NIH HHS R01 MH100066NIMH NIH HHS R37 MH043784
6 · The paper itself

Abstract

backgroundDeficits in gamma aminobutyric acid (GABA) neuron-related markers, including the GABA-synthesizing enzyme GAD67, the calcium-binding protein parvalbumin, the neuropeptide somatostatin, and the transcription factor Lhx6, are most pronounced in a subset of schizophrenia subjects identified as having a 'low GABA marker' (LGM) molecular phenotype. Furthermore, schizophrenia shares degrees of genetic liability, clinical features and cortical circuitry abnormalities with schizoaffective disorder and bipolar disorder. Therefore, we determined the extent to which a similar LGM molecular phenotype may also exist in subjects with these disorders.

methodTranscript levels for GAD67, parvalbumin, somatostatin, and Lhx6 were quantified using quantitative PCR in prefrontal cortex area 9 of 184 subjects with a diagnosis of schizophrenia (n = 39), schizoaffective disorder (n = 23) or bipolar disorder (n = 35), or with a confirmed absence of any psychiatric diagnoses (n = 87). A blinded clustering approach was employed to determine the presence of a LGM molecular phenotype across all subjects.

resultsApproximately 49% of the subjects with schizophrenia, 48% of the subjects with schizoaffective disorder, and 29% of the subjects with bipolar disorder, but only 5% of unaffected subjects, clustered in the cortical LGM molecular phenotype.

conclusionsThese findings support the characterization of psychotic and bipolar disorders by cortical molecular phenotype which may help elucidate more pathophysiologically informed and personalized medications.

Indexed as

AdultBiomarkersBipolar DisorderFemaleGABAergic Neuronsgamma-Aminobutyric AcidGlutamate DecarboxylaseHumansLIM-Homeodomain ProteinsMaleMiddle AgedNerve Tissue ProteinsParvalbuminsPhenotypePrefrontal CortexPsychotic DisordersBiomarkersgamma-Aminobutyric AcidGlutamate Decarboxylaseglutamate decarboxylase 1LHX6 protein, humanLIM-Homeodomain ProteinsNerve Tissue ProteinsParvalbuminsSomatostatinTranscription FactorsInhibitorypostmortemprefrontal cortexschizoaffectiveschizophrenia

Identifiers

PMID27328999
PMCPMC5584051
OpenAlexW2462481338

What OpenQuestion holds

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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.