Evidence map›Paper›PMID 18431005›Full record

ArticleRestorative neurology and neuroscience2008

TrkB gene transfer does not alter hippocampal neuronal loss and cognitive deficits following traumatic brain injury in mice.

Valeria Conte, Ramesh Raghupathi, Deborah J Watson, Scott Fujimoto, Nicolas C Royo, Niklas Marklund, Nino Stocchetti, Tracy K McIntosh

Open access · greenAbstract read
In one paragraph

Article in Restorative neurology and neuroscience, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.6field-weighted citation impact, top 17% 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

11 citing papers in PubMed, 24 citations in OpenAlex.

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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 1 institution in 1 country.

Valeria ConteTraumatic Brain Injury Laboratory, Department of Neurosurgery, University of Pennsylvania, Philadelphia, PA, USA.
Ramesh Raghupathi
Deborah J Watson
Scott Fujimoto
Nicolas C Royo
Niklas Marklund
Nino Stocchetti
Tracy K McIntosh
University of Pennsylvania · US

Funding

Vector CoreP30DK047757 · NIDDK · UNIVERSITY OF PENNSYLVANIA · PI WILSON, JAMES M · 1993 to 2017
$18.0M
TRAUMATIC WHITE MATTER ABNORMALITIES OF HUMAN HEAD INJURYP50NS008803 · NINDS · UNIVERSITY OF PENNSYLVANIA · PI GRADY, M SEAN · 1995 to 2005
$7.3M
NEUROPROTECTIVE GROWTH FACTORS IN TRAUMATIC BRAIN INJURYR01NS040978 · NINDS · UNIVERSITY OF PENNSYLVANIA · PI WATSON, DEBORAH J · 2001 to 2011
$3.3M
Caspase mediated cell death after brain traumaR01NS041561 · NINDS · UNIVERSITY OF PENNSYLVANIA · PI RAGHUPATHI, RAMESH · 2002 to 2006
$1.7M
ENDORPHINS IN SHOCK AND TRAUMAR01GM034690 · NIGMS · UNIVERSITY OF PENNSYLVANIA · PI MCINTOSH, TRACY K. · 1987 to 2003
$965k
SHORT TERM PHYSIOLOGIC EFFECTS OF THERAPYP01NS008803 · NINDS · UNIVERSITY OF PENNSYLVANIA · PI GENNARELLI, THOMAS A · 1985 to 1994
–
NIDDK NIH HHS DK47757NIDDK NIH HHS P30 DK047757NIGMS NIH HHS GM 34690NINDS NIH HHS NS 08803NINDS NIH HHS NS 40978NINDS NIH HHS NS41561NINDS NIH HHS P50 NS008803NINDS NIH HHS R01 NS040978NINDS NIH HHS R01 NS041561
6 · The paper itself

Abstract

purposeThe ability of brain-derived neurotrophic factor (BDNF) to attenuate secondary damage and influence behavioral outcome after experimental traumatic brain injury (TBI) remains controversial. Because TBI can result in decreased expression of the trkB receptor, thereby preventing BDNF from exerting potential neuroprotective effects, the contribution of both BDNF and its receptor trkB to hippocampal neuronal loss and cognitive dysfunction were evaluated.

methodsFull-length trkB was overexpressed in the left hippocampus of adult C57Bl/6 mice using recombinant adeno-associated virus serotype 2/5 (rAAV 2/5). EGFP (enhanced green fluorescent protein) expression was present at two weeks after AAV-EGFP injection and remained sustained up to four weeks after the injection. At 2 weeks following gene transduction, mice were subjected to parasagittal controlled cortical impact (CCI) brain injury, followed by either BDNF or PBS infusion into the hippocampus.

resultsNo differences were observed in learning ability at two weeks post-injury or in motor function from 48 hours to two weeks among treatment groups. The number of surviving pyramidal neurons in the CA2-CA3 region of the hippocampus was also not different among treatment groups.

conclusionsThese data suggest that neither overexpression of trkB, BNDF infusion or their combination affects neuronal survival or behavioral outcome following experimental TBI in mice.

Indexed as

Cognition DisordersAnalysis of VarianceAnimalsBrain InjuriesCell CountDependovirusDisease Models, AnimalGreen Fluorescent ProteinsHippocampusMaleMaze LearningMiceMice, Inbred C57BLMotor ActivityNeuronsReaction TimeGreen Fluorescent ProteinsReceptor, trkB

Identifiers

PMID18431005
PMCPMC2580053
OpenAlexW1569086356

What OpenQuestion holds

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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.