Evidence map›Paper›PMID 24442865›Full record

ArticleBrain structure & function2015

Structural and functional substrates of tetanus toxin in an animal model of temporal lobe epilepsy.

Alex S Ferecskó, Premysl Jiruska, Lucy Foss, Andrew D Powell, Wei-Chih Chang, Attila Sik, John G R Jefferys

Open access · hybridAbstract read
In one paragraph

Article in Brain structure & function, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
2.1field-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

14 citing papers in PubMed, 41 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. Article
  8. Synaptic Vesicles Dynamics in Neocortical Epilepsy.Frontiers in cellular neuroscience · 2020
    Article
  9. Synaptic Pruning by Microglia in Epilepsy.Journal of clinical medicine · 2019
    Review
  10. Article
  11. Article
  12. Transient Cognitive Impairment in Epilepsy.Frontiers in molecular neuroscience · 2018
    Article
  13. Review
  14. 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

7 authors at 2 institutions in 2 countries.

Alex S FerecskóNeuronal Networks Group, School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15 2TT, UK.
Premysl Jiruska
Lucy Foss
Andrew D Powell
Wei-Chih Chang
Attila Sik
John G R Jefferys
University of Birmingham · GBCharles University · CZ

Funding

Medical Research Council G0802162Medical Research Council G1001235
6 · The paper itself

Abstract

The effects of tetanus toxin (TeNT) both in the spinal cord, in clinical tetanus, and in the brain, in experimental focal epilepsy, suggest disruption of inhibitory synapses. TeNT is a zinc protease with selectivity for Vesicle Associated Membrane Protein (VAMP; previously synaptobrevin), with a reported selectivity for VAMP2 in rats. We found spatially heterogeneous expression of VAMP1 and VAMP2 in the hippocampus. Inhibitory terminals in stratum pyramidale expressed significantly more VAMP1 than VAMP2, while glutamatergic terminals in stratum radiatum expressed significantly more VAMP2 than VAMP1. Intrahippocampal injection of TeNT at doses that induce epileptic foci cleaved both isoforms in tissue around the injection site. The cleavage was modest at 2 days after injection and more substantial and extensive at 8 and 16 days. Whole-cell recordings from CA1 pyramidal cells close to the injection site, made 8-16 days after injection, showed that TeNT decreases spontaneous EPSC frequency to 38 % of control and VAMP2 immunoreactive axon terminals to 37 %. In contrast, TeNT almost completely abolished both spontaneous and evoked IPSCs while decreasing VAMP1 axon terminals to 45 %. We conclude that due to the functional selectivity of the toxin to the relative sparing of excitatory synaptic transmission shifts the network to pathogenically excitable state causing epilepsy.

Indexed as

Tetanus ToxinAnimalsBehavior, AnimalBrain WavesDisease Models, AnimalEpilepsy, Temporal LobeExcitatory Postsynaptic PotentialsHippocampusInhibitory Postsynaptic PotentialsMaleNeural InhibitionRats, Sprague-DawleySignal TransductionTemporal LobeTime FactorsVesicle-Associated Membrane Protein 1Tetanus ToxinVamp2 protein, ratVesicle-Associated Membrane Protein 1vesicle-associated membrane protein 1, ratVesicle-Associated Membrane Protein 2

Identifiers

PMID24442865
PMCPMC4341026
OpenAlexW2037662831

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Registered trials

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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.