Evidence map›Paper›PMID 29554264›Full record

ArticleThe international journal of neuropsychopharmacology2018

Isoflurane but Not Halothane Prevents and Reverses Helpless Behavior: A Role for EEG Burst Suppression?

P Leon Brown, Panos Zanos, Leiming Wang, Greg I Elmer, Todd D Gould, Paul D Shepard

Open access · goldAbstract readComparative Study
In one paragraph

Article in The international journal of neuropsychopharmacology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
4.5field-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

13 citing papers in PubMed, 31 citations in OpenAlex.

  1. Propofol for Treatment-Resistant Depression: A Pilot Study.The international journal of neuropsychopharmacology · 2018
    Trial
  2. Article
  3. Article
  4. Review
  5. Article
  6. Article
  7. Quiescence during burst suppression and postictal generalized EEG suppression are distinct patterns of activity.Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2022
    Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Article
  13. The best defense is a strong offense: preventing alcohol abstinence-induced depression.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2018
    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

6 authors at 2 institutions in 1 country.

P Leon BrownDepartment of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland.
Panos ZanosDepartment of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland.
Leiming WangDepartment of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland.
Greg I ElmerDepartment of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland.
Todd D GouldDepartment of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland.
Paul D ShepardDepartment of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland.
University of Maryland, Baltimore · USUniversity of Mary · US

Funding

Therapeutic Efficacy of Ketamine Metabolites for Depression TreatmentR01MH107615 · NIMH · UNIVERSITY OF MARYLAND BALTIMORE · PI GOULD, TODD D · 2016 to 2025
$7.2M
Multidisciplinary Schizophrenia Research TrainingT32MH067533 · NIMH · UNIVERSITY OF MARYLAND BALTIMORE · PI CARPENTER, WILLIAM T., ELMER, GREGORY I · 2004 to 2025
$4.3M
Anesthetic-induced burst suppression as a novel antidepressant mechanismR21MH110741 · NIMH · UNIVERSITY OF MARYLAND BALTIMORE · PI ELMER, GREGORY I, SHEPARD, PAUL D · 2016 to 2017
$424k
NIMH NIH HHS R01 MH107615NIMH NIH HHS R21 MH110741NIMH NIH HHS T32 MH067533
6 · The paper itself

Abstract

backgroundThe volatile anesthetic isoflurane may exert a rapid and long-lasting antidepressant effect in patients with medication-resistant depression. The mechanism underlying the putative therapeutic actions of the anesthetic have been attributed to its ability to elicit cortical burst suppression, a distinct EEG pattern with features resembling the characteristic changes that occur following electroconvulsive therapy. It is currently unknown whether the antidepressant actions of isoflurane are shared by anesthetics that do not elicit cortical burst suppression.

methodsIn vivo electrophysiological techniques were used to determine the effects of isoflurane and halothane, 2 structurally unrelated volatile anesthetics, on cortical EEG. The effects of anesthesia with either halothane or isoflurane were also compared on stress-induced learned helplessness behavior in rats and mice.

resultsIsoflurane, but not halothane, anesthesia elicited a dose-dependent cortical burst suppression EEG in rats and mice. Two hours of isoflurane, but not halothane, anesthesia reduced the incidence of learned helplessness in rats evaluated 2 weeks following exposure. In mice exhibiting a learned helplessness phenotype, a 1-hour exposure to isoflurane, but not halothane, reversed escape failures 24 hours following burst suppression anesthesia.

conclusionsThese results are consistent with a role for cortical burst suppression in mediating the antidepressant effects of isoflurane. They provide rationale for additional mechanistic studies in relevant animal models as well as a properly controlled clinical evaluation of the therapeutic benefits associated with isoflurane anesthesia in major depressive disorder.

Indexed as

ElectroencephalographyHelplessness, LearnedAnesthetics, InhalationAnimalsAntidepressive AgentsBehavior, AnimalBrainBrain WavesDose-Response Relationship, DrugHalothaneIsofluraneMaleMiceRats, Sprague-DawleyTime FactorsAnesthetics, InhalationAntidepressive AgentsHalothaneIsofluraneelectroconvulsive therapyfast-acting antidepressanthalothanelearned helplessnesstreatment-resistant depression

Identifiers

PMID29554264
PMCPMC6070045
OpenAlexW2793904927

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.