Evidence map›Paper›PMID 28536477›Full record

ArticleScientific reports2017

Reduced Mismatch Negativity is Associated with Increased Plasma Level of Glutamate in First-episode Psychosis.

Tatsuya Nagai, Kenji Kirihara, Mariko Tada, Daisuke Koshiyama, Shinsuke Koike, Motomu Suga, Tsuyoshi Araki, Kenji Hashimoto, Kiyoto Kasai

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 2 pooled it
4.2field-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

24 citing papers in PubMed, 2 syntheses or guidelines pooled it, 64 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. The Potential of Hair Matrix for Biomarker Analysis in Schizophrenia.International journal of molecular sciences · 2025
    Review
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  6. Learning predictive signals within a local recurrent circuit.Proceedings of the National Academy of Sciences of the United States of America · 2025
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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

9 authors at 3 institutions in 1 country.

Tatsuya NagaiDepartment of Psychiatry, Kawamuro Memorial Hospital 71-Ko, Ohaza, Kitashinpo, Joetsu-shi, Niigata-ken, 943-0109, Japan.
Kenji KiriharaDepartment of Neuropsychiatry, Graduate School of Medicine, University of Tokyo7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
Mariko TadaDepartment of Neuropsychiatry, Graduate School of Medicine, University of Tokyo7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
Daisuke KoshiyamaDepartment of Neuropsychiatry, Graduate School of Medicine, University of Tokyo7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
Shinsuke KoikeOffice for Counseling and Support, Division for Mental Health Support, The University of Tokyo 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
Motomu SugaDepartment of Rehabilitation, Graduate School of Medicine, University of Tokyo 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
Tsuyoshi ArakiDepartment of Youth Mental Health, Graduate School of Medicine, University of Tokyo 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
Kenji HashimotoDivision of Clinical Neuroscience, Chiba University Center for Forensic Mental Health 1-8-1, Inohana, Chuuoku-ku, Chiba-shi, Chiba-ken, 260-8670, Japan.
Kiyoto KasaiDepartment of Neuropsychiatry, Graduate School of Medicine, University of Tokyo7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan. kasaik-tky@umin.net.
The University of Tokyo · JPCenter for Forensic Mental Health, Chiba University · JPTokyo University of Social Welfare · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Reduced amplitude of mismatch negativity (MMN) is one of the more promising biological markers of schizophrenia. This finding holds true in both early and chronic phases of the disorder, and is compatible with the glutamatergic dysfunction hypothesis. To further establish MMN as a biomarker of aberrant glutamatergic neurotransmission, an exploration for an association with blood levels of glutamatergic amino acids is an important next step. Despite a large body of work investigating MMN in schizophrenia, no previous studies have undertaken this endeavor. Nineteen patients with first-episode psychosis (FEP), 21 ultra-high risk individuals (UHR), and 16 healthy controls (HC) participated in the study. The MMNs in response to duration change (dMMN) and frequency change (fMMN) were measured. The fasting plasma levels of glutamate, glutamine, glycine, D-serine, and L-serine were measured. dMMN amplitudes were significantly reduced in FEP and UHR, compared to HC. The plasma levels of glutamate of FEP were significantly higher than those of HC. Higher plasma levels of glutamate were associated with smaller dMMN amplitudes in the FEP and HC groups. These findings are compatible with the hypothesis that MMN is a useful biological marker of aberrant glutamatergic neurotransmission in the early stages of schizophrenia.

Indexed as

PersonalityAdolescentAdultAmino AcidsBiomarkersElectroencephalographyEvoked PotentialsFemaleGlutamic AcidHumansMaleNeuropsychological TestsPsychotic DisordersSeverity of Illness IndexYoung AdultAmino AcidsBiomarkersGlutamic Acid

Identifiers

PMID28536477
PMCPMC5442101
OpenAlexW2616413210

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.