Evidence map›Paper›PMID 25385788›Full record

ArticleSchizophrenia bulletin2015

Imaging neuroinflammation in gray and white matter in schizophrenia: an in-vivo PET study with [18F]-FEPPA.

Miran Kenk, Thiviya Selvanathan, Naren Rao, Ivonne Suridjan, Pablo Rusjan, Gary Remington, Jeffrey H Meyer, Alan A Wilson, Sylvain Houle, Romina Mizrahi

Abstract read
In one paragraph

Article in Schizophrenia bulletin, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 107 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
107citing papers in PubMed, 6 pooled it
–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

107 citing papers in PubMed, 6 syntheses or guidelines pooled it.

  1. Pooled it
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  7. A Randomized, Double-Blind, Placebo-Controlled Clinical Trial of Tocilizumab, An Interleukin-6 Receptor Antibody, For Residual Symptoms in Schizophrenia.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2018
    Trial
  8. Review
  9. Article
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  12. Article
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  14. Review
  15. Netrin-1 Is an Important Mediator in Microglia Migration.International journal of molecular sciences · 2024
    Article
  16. Article
  17. Microglia-neuron interactions in schizophrenia.Frontiers in cellular neuroscience · 2024
    Review
  18. Review
  19. Review
  20. The role of microglia in neuropsychiatric disorders and suicide.European archives of psychiatry and clinical neuroscience · 2022
    Review

47 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

10 authors.

Miran KenkResearch Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada.
Thiviya SelvanathanResearch Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada.
Naren RaoResearch Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada.
Ivonne SuridjanResearch Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada.
Pablo RusjanResearch Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada.
Gary RemingtonResearch Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada.
Jeffrey H MeyerResearch Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada.
Alan A WilsonResearch Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada.
Sylvain HouleResearch Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada.
Romina MizrahiResearch Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada romina.mizrahi@camhpet.ca.

Funding

Imaging Neuroinflammation in Clinical high risk and SchizophreniaR01MH100043 · NIMH · CENTRE FOR ADDICTION AND MENTAL HEALTH · PI MIZRAHI, ROMINA · 2014 to 2018
$1.6M
NIMH NIH HHS R01 MH100043NIMH NIH HHS R01MH-100043
6 · The paper itself

Abstract

Neuroinflammation and abnormal immune responses have been implicated in schizophrenia (SCZ). Past studies using positron emission tomography (PET) that examined neuroinflammation in patients with SCZ in vivo using the translocator protein 18kDa (TSPO) target were limited by the insensitivity of the first-generation imaging agent [(11)C]-PK11195, scanners used, and the small sample sizes studied. Present study uses a novel second-generation TSPO PET radioligand N-acetyl-N-(2-[(18)F]fluoroethoxybenzyl)-2-phenoxy-5-pyridinamine ([(18)F]-FEPPA) to evaluate whether there is increased neuroinflammation in patients with SCZ. A cross-sectional study was performed using [(18)F]-FEPPA and a high-resolution research tomograph (HRRT). Eighteen patients with SCZ with ongoing psychotic symptoms and 27 healthy volunteers (HV) were recruited from a tertiary psychiatric clinical setting and the community, respectively. All participants underwent [(18)F]-FEPPA PET and magnetic resonance imaging, and PET data were analyzed to obtain [(18)F]-FEPPA total volume of distribution (VT) using a 2-tissue compartment model with an arterial plasma input function, as previously validated. All subjects were classified as high-, medium- or low-affinity [(18)F]-FEPPA binders on the basis of rs6971 polymorphism, and genotype information was incorporated into the analyses of imaging outcomes. No significant differences in neuroinflammation indexed as [(18)F]-FEPPA VT were observed between groups in either gray (F(1,39) = 0.179, P = .674) or white matter regions (F(1,38) = 0.597, P = .445). The lack of significant difference in neuroinflammation in treated patients with SCZ in the midst of a psychotic episode and HV suggests that neuroinflammatory processes may take place early in disease progression or are affected by antipsychotic treatment.

Indexed as

AdultAnilidesCase-Control StudiesCross-Sectional StudiesFemaleGray MatterHumansInflammationMaleMicrogliaMiddle AgedPositron-Emission TomographyPyridinesRadiopharmaceuticalsReceptors, GABASchizophreniaAnilidesN-(2-((N-(4-phenoxypyridin-3-yl)acetamido)methyl)phenoxy)ethyl fluoridePyridinesRadiopharmaceuticalsReceptors, GABATSPO protein, humaninflammationmicrogliapositron emission tomographypsychosisrs6971 polymorphismtranslocator protein 18kDa (TSPO)

Identifiers

PMID25385788
PMCPMC4266311

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.