Evidence map›Paper›PMID 28776581›Full record

SynthesisNeuropsychopharmacology : official publication of the American College of Neuropsychopharmacology2018

Decreased Brain pH as a Shared Endophenotype of Psychiatric Disorders.

Hideo Hagihara, Vibeke S Catts, Yuta Katayama, Hirotaka Shoji, Tsuyoshi Takagi, Freesia L Huang, Akito Nakao, Yasuo Mori, Kuo-Ping Huang, Shunsuke Ishii and 4 more

Open access · hybridAbstract readMeta-Analysis
In one paragraph

Synthesis in Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed, 4 pooled it
3.9field-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

77 citing papers in PubMed, 4 syntheses or guidelines pooled it, 146 citations in OpenAlex.

  1. Pooled it
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  4. Brain lactate and pH in schizophrenia and bipolar disorder: a systematic review of findings from magnetic resonance studies.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2018
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  17. Dynamic control of NMDA receptor CaProceedings of the National Academy of Sciences of the United States of America · 2025
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17 more citing papers are in PubMed but not listed here.

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

14 authors at 7 institutions in 3 countries.

Hideo HagiharaDivision of Systems Medical Science, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan.
Vibeke S CattsSchizophrenia Research Laboratory, Neuroscience Research Australia, Randwick, NSW, Australia.
Yuta KatayamaDepartment of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan.
Hirotaka ShojiDivision of Systems Medical Science, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan.
Tsuyoshi TakagiInstitute for Developmental Research, Aichi Human Service Center, Kasugai, Japan.
Freesia L HuangProgram of Developmental Neurobiology, National Institute of Child Health and Human Development, National Institute of Health, Bethesda, MD, USA.
Akito NakaoDivision of Systems Medical Science, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan.
Yasuo MoriDepartment of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan.
Kuo-Ping HuangProgram of Developmental Neurobiology, National Institute of Child Health and Human Development, National Institute of Health, Bethesda, MD, USA.
Shunsuke IshiiRIKEN Tsukuba Institute, Tsukuba, Japan.
Isabella A GraefDepartment of Pathology, Stanford University School of Medicine, Stanford, CA, USA.
Keiichi I NakayamaDepartment of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan.
Cynthia Shannon WeickertSchizophrenia Research Laboratory, Neuroscience Research Australia, Randwick, NSW, Australia.
Tsuyoshi MiyakawaDivision of Systems Medical Science, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan.ORCID 0000-0003-0137-8200
Fujita Health University · JPEunice Kennedy Shriver National Institute of Child Health and Human Development · USFood Research Institute · JPKyushu University · JPUNSW Sydney · AUKyoto University · JPStanford University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although the brains of patients with schizophrenia and bipolar disorder exhibit decreased brain pH relative to those of healthy controls upon postmortem examination, it remains controversial whether this finding reflects a primary feature of the diseases or is a result of confounding factors such as medication and agonal state. To date, systematic investigation of brain pH has not been undertaken using animal models that can be studied without confounds inherent in human studies. In the present study, we first reevaluated the pH of the postmortem brains of patients with schizophrenia and bipolar disorder by conducting a meta-analysis of existing data sets from 10 studies. We then measured pH, lactate levels, and related metabolite levels in brain homogenates from five neurodevelopmental mouse models of psychiatric disorders, including schizophrenia, bipolar disorder, and autism spectrum disorder. All mice were drug naive with the same agonal state, postmortem interval, and age within each strain. Our meta-analysis revealed that brain pH was significantly lower in patients with schizophrenia and bipolar disorder than in control participants, even when a few potential confounding factors (postmortem interval, age, and history of antipsychotic use) were considered. In animal experiments, we observed significantly lower pH and higher lactate levels in the brains of model mice relative to controls, as well as a significant negative correlation between pH and lactate levels. Our findings suggest that lower pH associated with increased lactate levels is not a mere artifact, but rather implicated in the underlying pathophysiology of schizophrenia and bipolar disorder.

Indexed as

AnimalsBrainBrain ChemistryDisease Models, AnimalEndophenotypesFemaleHumansHydrogen-Ion ConcentrationLactic AcidMaleMental DisordersMiceMice, Inbred BALB CMice, Inbred C57BLMice, KnockoutLactic Acid

Identifiers

PMID28776581
PMCPMC5770757
OpenAlexW2745281996

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.