Evidence map›Paper›PMID 41504028›Full record

ArticleJournal of psychopharmacology (Oxford, England)2026

Associations between glutamate and cerebral blood flow in treatment-resistant schizophrenia during clozapine treatment.

Junyu Sun, Fernando Zelaya, Kyra-Verena Sendt, Grant McQueen, Amy L Gillespie, John Lally, Owen O'Daly, David J Lythgoe, Oliver D Howes, Gareth J Barker and 3 more

Abstract read
In one paragraph

Article in Journal of psychopharmacology (Oxford, England), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
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

2 citing papers in PubMed.

  1. Article
  2. Article
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

13 authors.

Junyu SunDepartment of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.ORCID 0000-0001-5532-3593
Fernando ZelayaDepartment of Neuroimaging, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.
Kyra-Verena SendtDepartment of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.
Grant McQueenDepartment of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.
Amy L GillespieDepartment of Psychiatry, Warneford Hospital, University of Oxford, UK.
John LallyDepartment of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.
Owen O'DalyDepartment of Neuroimaging, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.
David J LythgoeDepartment of Neuroimaging, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.
Oliver D HowesDepartment of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.
Gareth J BarkerDepartment of Neuroimaging, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.ORCID 0000-0002-5214-7421
Philip McGuireDepartment of Psychiatry, Warneford Hospital, University of Oxford, UK.
James H MacCabeDepartment of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.ORCID 0000-0002-6754-1018
Alice EgertonDepartment of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTreatment-resistant schizophrenia (TRS) is associated with alterations in glutamate levels and cerebral blood flow (CBF), and treatment with clozapine appears to have an impact on each of these measures. Here, we examined whether changes in CBF and glutamate levels following clozapine treatment are related.

methodsGlutamate concentrations in the anterior cingulate cortex (ACC), and striatum (measured using proton magnetic resonance spectroscopy,

resultsThe longitudinal change in striatal glutamate during treatment was positively associated with the longitudinal change in striatal CBF (

conclusionsThese results indicate that there is a direct relationship between changes in glutamate activity and CBF in the striatum following clozapine treatment. Future research could investigate whether glutamate-CBF relationships exist in other stages of psychosis or schizophrenia and during treatment with other antipsychotic medications. Associations with clinical outcomes could be explored in larger samples.

Indexed as

Antipsychotic AgentsCerebrovascular CirculationClozapineGlutamic AcidSchizophreniaSchizophrenia, Treatment-ResistantAdultCorpus StriatumFemaleGyrus CinguliHumansLongitudinal StudiesMaleMiddle AgedAntipsychotic AgentsClozapineGlutamic Acidcerebral blood flowclozapineglutamateTreatment-resistant schizophrenia

Identifiers

PMID41504028
PMCPMC13283506

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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.