Evidence map›Paper›PMID 34924947›Full record

ReviewFrontiers in neuroscience2021

How Is the Norepinephrine System Involved in the Antiepileptic Effects of Vagus Nerve Stimulation?

Alexandre Berger, Simone Vespa, Laurence Dricot, Manon Dumoulin, Evelina Iachim, Pascal Doguet, Gilles Vandewalle, Riëm El Tahry

Open access · goldAbstract readReview
In one paragraph

Review in Frontiers in neuroscience, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 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

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 45 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. bioRxiv : the preprint server for biology · 2026
    Article
  5. Article
  6. Article
  7. Review
  8. Efficacy of vagus nerve stimulator during transition to adulthood in patients with treatment-resistant epilepsy.Epileptic disorders : international epilepsy journal with videotape · 2026
    Article
  9. Article
  10. Sudden Unexpected Death in Epilepsy: Central Respiratory Chemoreception.International journal of molecular sciences · 2025
    Review
  11. Interaction of the Vagus Nerve and Serotonin in the Gut-Brain Axis.International journal of molecular sciences · 2025
    Review
  12. Review
  13. Review
  14. REM refines and rescues memory representations: a new theory.Sleep advances : a journal of the Sleep Research Society · 2025
    Review
  15. Review
  16. Article
  17. Review
  18. Article
  19. Article
  20. 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

8 authors at 3 institutions in 2 countries.

Alexandre BergerInstitute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.
Simone VespaInstitute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.
Laurence DricotInstitute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.
Manon DumoulinInstitute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.
Evelina IachimInstitute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.
Pascal DoguetSynergia Medical SA, Mont-Saint-Guibert, Belgium.
Gilles VandewalleGIGA-Cyclotron Research Center-In Vivo Imaging, University of Liège, Liège, Belgium.
Riëm El TahryInstitute of Neuroscience, Université catholique de Louvain, Brussels, Belgium.
UCLouvain · BEUniversity of Liège · BECliniques Universitaires Saint-Luc · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Vagus Nerve Stimulation (VNS) is an adjunctive treatment for patients suffering from inoperable drug-resistant epilepsy. Although a complete understanding of the mediators involved in the antiepileptic effects of VNS and their complex interactions is lacking, VNS is known to trigger the release of neurotransmitters that have seizure-suppressing effects. In particular, norepinephrine (NE) is a neurotransmitter that has been associated with the clinical effects of VNS by preventing seizure development and by inducing long-term plastic changes that could restore a normal function of the brain circuitry. However, the biological requisites to become responder to VNS are still unknown. In this review, we report evidence of the critical involvement of NE in the antiepileptic effects of VNS in rodents and humans. Moreover, we emphasize the hypothesis that the functional integrity of the noradrenergic system could be a determining factor to obtain clinical benefits from the therapy. Finally, encouraging avenues of research involving NE in VNS treatment are discussed. These could lead to the personalization of the stimulation parameters to maximize the antiepileptic effects and potentially improve the response rate to the therapy.

Indexed as

biomarkerepilepsylocus coeruleusnorepinephrinevagus nerveVNS

Identifiers

PMID34924947
PMCPMC8675889
OpenAlexW4200546615

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.