Evidence map›Paper›PMID 28556775›Full record

Trial reportJournal of psychiatry & neuroscience : JPN2017

Glutamatergic deficit and schizophrenia-like negative symptoms: new evidence from ketamine-induced mismatch negativity alterations in healthy male humans.

Stephanie Thiebes, Gregor Leicht, Stjepan Curic, Saskia Steinmann, Nenad Polomac, Christina Andreou, Iris Eichler, Lars Eichler, Christian Zöllner, Jürgen Gallinat and 2 more

Open access · bronzeAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Journal of psychiatry & neuroscience : JPN, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 2 pooled it
2.5field-weighted citation impact, top 11% 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

23 citing papers in PubMed, 2 syntheses or guidelines pooled it, 45 citations in OpenAlex.

  1. Glutamatergic Modulation of Brain Function in Psychosis: A Systematic Review of Neuroimaging Studies.Biological psychiatry. Cognitive neuroscience and neuroimaging · 2025
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  4. Reduced auditory evoked gamma-band response and schizophrenia-like clinical symptoms under subanesthetic ketamine.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2019
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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

12 authors at 3 institutions in 2 countries.

Stephanie ThiebesFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Gregor LeichtFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Stjepan CuricFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Saskia SteinmannFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Nenad PolomacFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Christina AndreouFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Iris EichlerFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Lars EichlerFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Christian ZöllnerFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Jürgen GallinatFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Ileana Hanganu-OpatzFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Christoph MulertFrom the Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Thiebes, Leicht, Curic, Steinmann, Polomac, Andreou, Mulert); the Center for Gender Research and Early Detection, University of Basel Psychiatric Clinics, Basel, Switzerland (Andreou); the Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Eichler, Zöllner); the Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Gallinat); and the Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Hanganu-Opatz).
Universität Hamburg · DEUniversity Medical Center Hamburg-Eppendorf · DEUniversity of Basel · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTargeting the

methodsWe examined the impact of ketamine during an MMN paradigm with 64-channel electroencephalography (EEG) and assessed the psychopathological status using the Positive and Negative Syndrome Scale (PANSS) in healthy male volunteers using a single-blind, randomized, placebo-controlled crossover design. Low-resolution brain electromagnetic tomography was used for source localization.

resultsTwenty-four men were included in our analysis. Significant reductions of MMN amplitudes and an increase in all PANSS scores were identified under the ketamine condition. Smaller MMN amplitudes were specifically associated with more pronounced negative symptoms. Source analysis of MMN generators indicated a significantly reduced current source density (CSD) under the ketamine condition in the primary auditory cortex, the posterior cingulate and the middle frontal gyrus. LIMITATIONS: The sample included only men within a tight age range of 20-32 years.

conclusionThe MMN might represent a biomarker for negative symptoms in schizophrenia related to an insufficient NMDAR system and could be used to identify patients with schizophrenia with negative symptoms due to NMDAR dysfunction.

Indexed as

AdultBrainEvoked Potentials, AuditoryExcitatory Amino Acid AntagonistsGlutamic AcidHealthy VolunteersHumansKetamineMaleReceptors, N-Methyl-D-AspartateSchizophreniaSingle-Blind MethodYoung AdultExcitatory Amino Acid AntagonistsGlutamic AcidKetamineReceptors, N-Methyl-D-Aspartate

Identifiers

PMID28556775
PMCPMC5487274
OpenAlexW2713444075

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.