Evidence map›Paper›PMID 37925074›Full record

SynthesisBiological psychiatry. Cognitive neuroscience and neuroimaging2024

Greater Choline-Containing Compounds and Myo-inositol in Treatment-Resistant Versus Responsive Schizophrenia: A

Jason Smucny, Cameron S Carter, Richard J Maddock

Open access · greenAbstract readMeta-Analysis
In one paragraph

Synthesis in Biological psychiatry. Cognitive neuroscience and neuroimaging, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
2.5field-weighted citation impact, top 10% 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

9 citing papers in PubMed, 2 syntheses or guidelines pooled it, 11 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Article
  7. Elevated Extracellular Free Water in the Brain Predicts Clinical Improvement in First-Episode Psychosis.Biological psychiatry. Cognitive neuroscience and neuroimaging · 2025
    Article
  8. Article
  9. Is treatment-resistant schizophrenia a neuroimmune condition? Meta-analytic evidence from magnetic resonance spectroscopy.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2024
    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

3 authors at 1 institution in 1 country.

Jason SmucnyDepartment of Psychiatry and Behavioral Sciences, University of California, Davis, Davis, California. Electronic address: jsmucny@ucdavis.edu.
Cameron S CarterDepartment of Psychiatry and Behavioral Sciences, University of California, Davis, Davis, California.
Richard J MaddockDepartment of Psychiatry and Behavioral Sciences, University of California, Davis, Davis, California.
University of California, Davis · US

Funding

UC Davis Conte Center: Neuroimmune Mechanisms of Psychiatric DisordersP50MH106438 · NIMH · UNIVERSITY OF CALIFORNIA AT DAVIS · PI CARTER, CAMERON S. · 2015 to 2025
$26.1M
PATHOPHYSIOLOGY OF COGNITIVE DISABILITY IN SCHIZOPHRENIAR01MH059883 · NIMH · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI CARTER, CAMERON S. · 2000 to 2017
$6.1M
Pathophysiology Informed Biomarkers of Treatment Response in Early Psychosis (PIB)R01MH122139 · NIMH · UNIVERSITY OF CALIFORNIA-IRVINE · PI CARTER, CAMERON S. · 2020 to 2024
$3.2M
Predictive Markers and Mechanisms of Persistent Psychotic-like Experiences in Children: An Adolescent Brain and Cognitive Development Study AnalysisK01MH125096 · NIMH · UNIVERSITY OF CALIFORNIA AT DAVIS · PI SMUCNY, JASON · 2021 to 2025
$872k
NIMH NIH HHS K01 MH125096NIMH NIH HHS P50 MH106438NIMH NIH HHS R01 MH059883NIMH NIH HHS R01 MH122139
6 · The paper itself

Abstract

backgroundThe neurobiology of treatment-resistant schizophrenia (TRS) is poorly understood, and meta-analytic consensus regarding magnetic resonance spectroscopic profiles of glutamate, choline-containing compounds, myo-inositol, and other metabolites in the condition is lacking.

methodsIn this meta-analysis, we examined published findings for N-acetylaspartate, choline-containing compounds (phosphocholine+glycerophosphocholine), myo-inositol, creatine+phosphocreatine, glutamate, and glutamate+glutamine in the anterior cingulate cortex and dorsal striatum in people with TRS versus non-TRS as well as TRS versus healthy control participants (HCs) and TRS versus ultra TRS (i.e., TRS with clozapine resistance). A MEDLINE search revealed 9 articles including 239 people with pooled TRS and ultra TRS, 59 with ultra TRS, 175 with non-TRS, and 153 (HCs) that met meta-analytic criteria.

resultsSignificant effects included higher anterior cingulate cortex phosphocholine+glycerophosphocholine and myo-inositol in the pooled TRS and ultra TRS group than in both the non-TRS group and HCs as well as higher dorsal striatal phosphocholine+glycerophosphocholine in ultra TRS versus HCs, but no differences in other regional metabolites.

conclusionsThe observed metabolite profile in TRS (higher phosphocholine+glycerophosphocholine and myo-inositol signal) is consistent with the hypothesis that TRS has a neuroinflammatory component, although this meta-analysis is not a critical test of that hypothesis. A similar profile is seen in healthy aging, which is known to involve increased neuroinflammation and glial activation. Because the overall number of datasets was low, however, results should be considered preliminary and highlight the need for additional studies of brain metabolites in TRS and their possible association with inflammatory processes.

Indexed as

SchizophreniaCholineGlutamic AcidHumansInositolMagnetic Resonance SpectroscopyPhosphorylcholineCholineGlutamic AcidInositolPhosphorylcholine(1)H-MRSCholineMyo-inositolNAAN-acetyl-aspartateSpectroscopy

Identifiers

PMID37925074
PMCPMC11192527
OpenAlexW4388249228

What OpenQuestion holds

Textmetadata
LicenceTDM
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.