Evidence map›Paper›PMID 32913220›Full record

ArticleScientific reports2020

Low brain endocannabinoids associated with persistent non-goal directed nighttime hyperactivity after traumatic brain injury in mice.

Alexandra Vogel, Annett Wilken-Schmitz, Regina Hummel, Manuel Lang, Robert Gurke, Yannick Schreiber, Michael K E Schäfer, Irmgard Tegeder

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
4.8field-weighted citation impact, top 4% 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

21 citing papers in PubMed, 45 citations in OpenAlex.

  1. Article
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  5. The effect of traumatic brain injury on learning and memory: A synaptic focus.The Neuroscientist : a review journal bringing neurobiology, neurology and psychiatry · 2025
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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

8 authors at 3 institutions in 1 country.

Alexandra VogelInstitute of Clinical Pharmacology, Medical Faculty, Goethe-University Frankfurt, Frankfurt, Germany.
Annett Wilken-SchmitzInstitute of Clinical Pharmacology, Medical Faculty, Goethe-University Frankfurt, Frankfurt, Germany.
Regina HummelDepartment of Anesthesiology, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany.
Manuel LangDepartment of Anesthesiology, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany.
Robert GurkeInstitute of Clinical Pharmacology, Medical Faculty, Goethe-University Frankfurt, Frankfurt, Germany.
Yannick SchreiberInstitute of Clinical Pharmacology, Medical Faculty, Goethe-University Frankfurt, Frankfurt, Germany.
Michael K E SchäferDepartment of Anesthesiology, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany.
Irmgard TegederInstitute of Clinical Pharmacology, Medical Faculty, Goethe-University Frankfurt, Frankfurt, Germany. tegeder@em.uni-frankfurt.de.
Goethe University Frankfurt · DEUniversity Medical Center of the Johannes Gutenberg University Mainz · DEJohannes Gutenberg University Mainz · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Traumatic brain injury (TBI) is a frequent cause of chronic headache, fatigue, insomnia, hyperactivity, memory deficits, irritability and posttraumatic stress disorder. Recent evidence suggests beneficial effects of pro-cannabinoid treatments. We assessed in mice levels of endocannabinoids in association with the occurrence and persistence of comparable sequelae after controlled cortical impact in mice using a set of long-term behavioral observations in IntelliCages, motor and nociception tests in two sequential cohorts of TBI/sham mice. TBI mice maintained lower body weights, and they had persistent low levels of brain ethanolamide endocannabinoids (eCBs: AEA, OEA, PEA) in perilesional and subcortical ipsilateral brain tissue (6 months), but rapidly recovered motor functions (within days), and average nociceptive responses were within normal limits, albeit with high variability, ranging from loss of thermal sensation to hypersensitivity. TBI mice showed persistent non-goal directed nighttime hyperactivity, i.e. they visited rewarding and non-rewarding operant corners with high frequency and random success. On successful visits, they made more licks than sham mice resulting in net over-licking. The lower the eCBs the stronger was the hyperactivity. In reward-based learning and reversal learning tasks, TBI mice were not inferior to sham mice, but avoidance memory was less stable. Hence, the major late behavioral TBI phenotype was non-goal directed nighttime hyperactivity and "over-licking" in association with low ipsilateral brain eCBs. The behavioral phenotype would agree with a "post-TBI hyperactivity disorder". The association with persistently low eCBs in perilesional and subcortical regions suggests that eCB deficiency contribute to the post-TBI psychopathology.

Indexed as

Behavior, AnimalDisease Models, AnimalAnimalsAttention Deficit Disorder with HyperactivityBrain Injuries, TraumaticEndocannabinoidsFemaleInflammationMaze LearningMemory DisordersMiceMice, Inbred C57BLEndocannabinoids

Identifiers

PMID32913220
PMCPMC7483739
OpenAlexW3084067067

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.