Evidence map›Paper›PMID 19929375›Full record

ArticleJournal of neurotrauma2009

Novel model of frontal impact closed head injury in the rat.

Michael Kilbourne, Reed Kuehn, Cigdem Tosun, John Caridi, Kaspar Keledjian, Grant Bochicchio, Thomas Scalea, Volodymyr Gerzanich, J Marc Simard

Open access · hybridAbstract read
In one paragraph

Article in Journal of neurotrauma, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 2 pooled it
2.9field-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

51 citing papers in PubMed, 2 syntheses or guidelines pooled it, 101 citations in OpenAlex.

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  18. Regulation of Phosphorylated State of NMDA Receptor by STEPAntioxidants (Basel, Switzerland) · 2021
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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

9 authors at 2 institutions in 1 country.

Michael KilbourneDepartment of Surgery, Walter Reed Army Medical Center , Washington, D.C., USA.
Reed Kuehn
Cigdem Tosun
John Caridi
Kaspar Keledjian
Grant Bochicchio
Thomas Scalea
Volodymyr Gerzanich
J Marc Simard
University of Maryland, Baltimore · USWalter Reed Army Institute of Research · US

Funding

Sulfonylurea receptor 1 (SUR1)- A novel therapeutic target in ischemic strokeR01HL082517 · NHLBI · UNIVERSITY OF MARYLAND BALTIMORE · PI SIMARD, J. MARC · 2006 to 2021
$5.6M
TRPM4 channel in spinal cord injuryR01NS061934 · NINDS · UNIVERSITY OF MARYLAND BALTIMORE · PI GERZANICH, VLADIMIR · 2008 to 2018
$3.3M
Pathological role of the SUR1-regulated NC(Ca-ATP) channel in cortex after subaraR01NS061808 · NINDS · UNIVERSITY OF MARYLAND BALTIMORE · PI SIMARD, J. MARC · 2009 to 2013
$1.6M
NHLBI NIH HHS HL082517NINDS NIH HHS NS060801NINDS NIH HHS NS061808NINDS NIH HHS NS061934
6 · The paper itself

Abstract

Frontal impact, closed head trauma is a frequent cause of traumatic brain injury (TBI) in motor vehicle and sports accidents. Diffuse axonal injury (DAI) is common in humans and experimental animals, and results from shearing forces that develop within the anisotropic brain. Because the specific anisotropic properties of the brain are axis-dependent, the anatomical site where force is applied as well as the resultant acceleration, be it linear, rotational, or some combination, are important determinants of the resulting pattern of brain injury. Available rodent models of closed head injury do not reproduce the frontal impact commonly encountered in humans. Here we describe a new rat model of closed head injury that is a modification of the impact-acceleration model of Marmarou. In our model (the Maryland model), the impact force is applied to the anterior part of the cranium and produces TBI by causing anterior-posterior plus sagittal rotational acceleration of the brain inside the intact cranium. Skull fractures, prolonged apnea, and mortality were absent. The animals exhibited petechial hemorrhages, DAI marked by a bead-like pattern of beta-amyloid precursor protein (beta-APP) in damaged axons, and widespread upregulation of beta-APP in neurons, with regions affected including the orbitofrontal cortex (coup), corpus callosum, caudate, putamen, thalamus, cerebellum, and brainstem. Activated caspase-3 was prominent in hippocampal neurons and Purkinje cells at the grey-white matter junction of the cerebellum. Neurobehavioral dysfunction, manifesting as reduced spontaneous exploration, lasted more than 1 week. We conclude that the Maryland model produces diffuse injuries that may be relevant to human brain injury.

Indexed as

AccelerationAmyloid beta-Protein PrecursorAnimalsAxonsBiomarkersBiomechanical PhenomenaBrainBrain InjuriesCaspase 3Diffuse Axonal InjuryDisease Models, AnimalFrontal BoneHead Injuries, ClosedHippocampusMaleNeuronsAmyloid beta-Protein PrecursorBiomarkersCaspase 3

Identifiers

PMID19929375
PMCPMC2824220
OpenAlexW1989193081

What OpenQuestion holds

Textmetadata
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.