Evidence map›Paper›PMID 28240740›Full record

ArticleScientific reports2017

Investigating Cortical Inhibition in First-Degree Relatives and Probands in Schizophrenia.

Natasha Radhu, Luis Garcia Dominguez, Tiffany A Greenwood, Faranak Farzan, Mawahib O Semeralul, Margaret A Richter, James L Kennedy, Daniel M Blumberger, Robert Chen, Paul B Fitzgerald and 1 more

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 12 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 2 pooled it
1.9field-weighted citation impact, top 14% 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

12 citing papers in PubMed, 2 syntheses or guidelines pooled it, 23 citations in OpenAlex.

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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

11 authors at 6 institutions in 3 countries.

Natasha RadhuNovartis Pharmaceuticals Canada Inc., Dorval, Quebec, Canada.
Luis Garcia DominguezTemerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada.
Tiffany A GreenwoodDepartment of Psychiatry, School of Medicine, University of California, San Diego, La Jolla, California, USA.
Faranak FarzanTemerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada.
Mawahib O SemeralulTemerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada.
Margaret A RichterFrederick W. Thompson Anxiety Disorders Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada.
James L KennedyCampbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario Canada.
Daniel M BlumbergerTemerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada.
Robert ChenDivision of Neurology, Krembil Research Institute, University of Toronto, Toronto, Ontario, Canada.
Paul B FitzgeraldMonash Alfred Psychiatry Research Centre, The Alfred and Monash University Central Clinical School, Victoria, Australia.
Zafiris J DaskalakisTemerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada.
Centre for Addiction and Mental Health · CAKrembil Research InstituteNovartis (Canada) · CASunnybrook Health Science Centre · CAThe Alfred Hospital · AUUniversity of California, San Diego · US

Funding

CIHR
6 · The paper itself

Abstract

Deficits in GABAergic inhibitory neurotransmission are a reliable finding in schizophrenia (SCZ) patients. Previous studies have reported that unaffected first-degree relatives of patients with SCZ demonstrate neurophysiological abnormalities that are intermediate between probands and healthy controls. In this study, first-degree relatives of patients with SCZ and their related probands were investigated to assess frontal cortical inhibition. Long-interval cortical inhibition (LICI) was measured from the dorsolateral prefrontal cortex (DLPFC) using combined transcranial magnetic stimulation (TMS) and electroencephalography (EEG). The study presents an extended sample of 129 subjects (66 subjects have been previously reported): 19 patients with SCZ or schizoaffective disorder, 30 unaffected first-degree relatives of these SCZ patients, 13 obsessive-compulsive disorder (OCD) patients, 18 unaffected first-degree relatives of these OCD patients and 49 healthy subjects. In the DLPFC, cortical inhibition was significantly decreased in patients with SCZ compared to healthy subjects. First-degree relatives of patients with SCZ showed significantly more cortical inhibition than their SCZ probands. No differences were demonstrated between first-degree relatives of SCZ patients and healthy subjects. Taken together, these findings show that more studies are needed to establish an objective biological marker for potential diagnostic usage in severe psychiatric disorders.

Indexed as

FamilyNeural InhibitionAdultCase-Control StudiesCerebral CortexElectroencephalographyFemaleHumansMaleMiddle AgedObsessive-Compulsive DisorderPrefrontal CortexSchizophreniaTranscranial Magnetic Stimulation

Identifiers

PMID28240740
PMCPMC5378912
OpenAlexW2613762066

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.