Evidence map›Paper›PMID 23922306›Full record

ArticleAnnals of neurology2013

Clinical correlates in an experimental model of repetitive mild brain injury.

Rebekah Mannix, William P Meehan, Joseph Mandeville, Patricia E Grant, Tory Gray, Jacqueline Berglass, Jimmy Zhang, John Bryant, Shervin Rezaie, Joon Yong Chung and 6 more

Open access · greenAbstract read
In one paragraph

Article in Annals of neurology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 97 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
97citing papers in PubMed, 1 pooled it
11.6field-weighted citation impact, top 1% 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

97 citing papers in PubMed, 1 synthesis or guideline pooled it, 156 citations in OpenAlex.

  1. Pooled it
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  5. Review
  6. Article
  7. The role of the Pin1-Frontiers in cell and developmental biology · 2024
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  8. Article
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  15. Article
  16. Repetitive Mild Closed Head Injury in Adolescent Mice Is Associated with Impaired Proteostasis, Neuroinflammation, and Tauopathy.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2022
    Article
  17. Article
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  19. Article
  20. B cells support the repair of injured tissues by adopting MyD88-dependent regulatory functions and phenotype.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2021
    Article

37 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

16 authors at 7 institutions in 1 country.

Rebekah MannixDivision of Emergency Medicine, Boston Children's Hospital, Boston, MA; Harvard Medical School, Boston, MA.
William P Meehan
Joseph Mandeville
Patricia E Grant
Tory Gray
Jacqueline Berglass
Jimmy Zhang
John Bryant
Shervin Rezaie
Joon Yong Chung
Nicholas V Peters
Christopher Lee
Lee W Tien
David L Kaplan
Mel Feany
Michael Whalen
Massachusetts General Hospital · USBoston Children's Museum · USTufts University · USBoston Children's Hospital · USBrigham and Women's Hospital · USHarvard University · USSports Concussion Institute · US

Funding

RESEARCH TRAINING IN PEDIATRIC EMERGENCY MEDICINET32HD040128 · NICHD · CHILDREN'S HOSPITAL BOSTON · PI Kenneth D. Mandl · 2001 to 2026
$5.0M
Development of a repetitive concussion traumatic brain injury modelR21NS075226 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI WHALEN, MICHAEL J · 2012 to 2013
$460k
NICHD NIH HHS T32 HD040128NICHD NIH HHS T32HD040128-06NINDS NIH HHS R21 NS075226NINDS NIH HHS R21NS075226
6 · The paper itself

Abstract

objectiveAlthough there is growing awareness of the long-term cognitive effects of repetitive mild traumatic brain injury (rmTBI; eg, sports concussions), whether repeated concussions cause long-term cognitive deficits remains controversial. Moreover, whether cognitive deficits depend on increased amyloid β deposition and tau phosphorylation or are worsened by the apolipoprotein E4 allele remains unknown. Here, we use an experimental model of rmTBI to address these clinical controversies.

methodsA weight drop rmTBI model was used that results in cognitive deficits without loss of consciousness, seizures, or gross or microscopic evidence of brain damage. Cognitive function was assessed using a Morris water maze (MWM) paradigm. Immunostaining and enzyme-linked immunosorbent assay (ELISA) were used to assess amyloid β deposition and tau hyperphosphorylation. Brain volume and white matter integrity were assessed by magnetic resonance imaging (MRI).

resultsMice subjected to rmTBI daily or weekly but not biweekly or monthly had persistent cognitive deficits as long as 1 year after injuries. Long-term cognitive deficits were associated with increased astrocytosis but not tau phosphorylation or amyloid β (by ELISA); plaques or tangles (by immunohistochemistry); or brain volume loss or changes in white matter integrity (by MRI). APOE4 was not associated with worse MWM performance after rmTBI.

interpretationWithin the vulnerable time period between injuries, rmTBI produces long-term cognitive deficits independent of increased amyloid β or tau phosphorylation. In this model, cognitive outcome is not influenced by APOE4 status. The data have implications for the long-term mental health of athletes who suffer multiple concussions.

Indexed as

Amyloid beta-PeptidesAnimalsApolipoproteins EAxonsBrainBrain ConcussionBrain InjuriesCognition DisordersDisease Models, AnimalEnzyme-Linked Immunosorbent AssayMagnetic Resonance ImagingMaleMaze LearningMiceNeurogliaNeuronsAmyloid beta-PeptidesApolipoproteins Etau Proteins

Identifiers

PMID23922306
PMCPMC6312716
OpenAlexW1940088424

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.