Evidence map›Paper›PMID 33657474›Full record

ArticleEuropean journal of radiology2021

Altered in vivo brain GABA and glutamate levels are associated with multiple sclerosis central fatigue.

Jameen Arm, Georg Oeltzschner, Oun Al-Iedani, Rod Lea, Jeannette Lechner-Scott, Saadallah Ramadan

Open access · greenAbstract read
In one paragraph

Article in European journal of radiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
3.6field-weighted citation impact, top 6% 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

22 citing papers in PubMed, 34 citations in OpenAlex.

  1. Article
  2. Network Localization of Fatigue in Multiple Sclerosis.Annals of clinical and translational neurology · 2026
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  4. Impact of a GABA-ProducingFASEB bioAdvances · 2026
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  19. Fatigue in fluctuating Parkinson's disease patients: possible impact of safinamide.Journal of neural transmission (Vienna, Austria : 1996) · 2023
    Article
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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

6 authors at 4 institutions in 2 countries.

Jameen ArmSchool of Health Sciences, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, 2308, Australia; Hunter Medical Research Institute, 1 Kookaburra Circuit, New Lambton, NSW, 2305, Australia.
Georg OeltzschnerThe Russell H. Morgan Department of Radiology and Radiological Science, the Johns Hopkins University School of Medicine, Baltimore, MD, USA; F. M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore MD, USA.
Oun Al-IedaniSchool of Health Sciences, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, 2308, Australia; Hunter Medical Research Institute, 1 Kookaburra Circuit, New Lambton, NSW, 2305, Australia.
Rod LeaHunter Medical Research Institute, 1 Kookaburra Circuit, New Lambton, NSW, 2305, Australia; Institute of Health and Biomedical Innovation, School of Biomedical Sciences, Queensland University of Technology, Brisbane, Australia.
Jeannette Lechner-ScottHunter Medical Research Institute, 1 Kookaburra Circuit, New Lambton, NSW, 2305, Australia; Department of Neurology, John Hunter Hospital, New Lambton Heights, Newcastle, 2305, Australia; School of Medicine and Public Health, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, 2308, Australia.
Saadallah RamadanSchool of Health Sciences, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, 2308, Australia; Hunter Medical Research Institute, 1 Kookaburra Circuit, New Lambton, NSW, 2305, Australia. Electronic address: Saadallah.ramadan@newcastle.edu.au.
Hunter Medical Research Institute · AUJohn Hunter Hospital · AUKennedy Krieger Institute · USQueensland University of Technology · AU

Funding

Towards a comprehensive neurometabolic profile in patients with mild cognitive impairment.K99AG062230 · NIA · JOHNS HOPKINS UNIVERSITY · PI OELTZSCHNER, GEORG · 2019 to 2020
$171k
NIA NIH HHS K99 AG062230
6 · The paper itself

Abstract

purposeFatigue is a common symptom in patients with multiple sclerosis (MS) with unknown pathophysiology. Dysfunction of the GABAergic/glutamatergic pathways involving inhibitory and excitatory neurotransmitters such as  γ-aminobutyric acid (GABA) and glutamine + glutamate pool (Glx) have been implicated in several neurological disorders. This study is aimed to evaluate the potential role of GABA and Glx in the origin of central fatigue in relapse remitting MS (RRMS) patients.

methods24 RRMS patients and 16 age- and sex-matched healthy controls (HC) were scanned using Mescher-Garwood point resolved spectroscopy (MEGA-PRESS) with a 3 T system to quantify GABA+ and Glx from prefrontal (PFC) and sensorimotor (SMC) cortices. Self-reported fatigue status was measured on all participants using the Modified Fatigue Impact Scale (MFIS).

resultsRRMS patients had higher fatigue scores relative to HC (p ≤  0.05). Compared to HC, Glx levels in RRMS patients were significantly decreased in SMC (p =  0.04). Significant correlations were found between fatigue scores and GABA+ (r = -0.531, p =  0.008) and Glx (r = 0.511, p =  0.018) in PFC. Physical fatigue was negatively correlated with GABA+ in SMC and PFC (r = -0.428 and -0.472 respectively, p ≤  0.04) and positively with PFC Glx (r = 0.480, p =  0.028).

conclusionThe associations between fatigue and GABA + and Glx suggest that there might be dysregulation of GABAergic/glutamatergic neurotransmission in the pathophysiological mechanism of central fatigue in MS.

Indexed as

Glutamic AcidMultiple SclerosisBrainFatiguegamma-Aminobutyric AcidGlutamineHumansMagnetic Resonance ImagingMagnetic Resonance Spectroscopygamma-Aminobutyric AcidGlutamic AcidGlutamineMagnetic resonance imagingMagnetic resonance spectroscopyMescher-Garwood point resolved spectroscopyMS fatigueNeurometabolites

Identifiers

PMID33657474
PMCPMC8900256
OpenAlexW3133393149

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.