Evidence map›Paper›PMID 34806422›Full record

ArticleJournal of neurotrauma2022

Mild Traumatic Brain Injury/Concussion Initiates an Atypical Astrocyte Response Caused by Blood-Brain Barrier Dysfunction.

Kijana K George, Benjamin P Heithoff, Oleksii Shandra, Stefanie Robel

Open access · greenAbstract read
In one paragraph

Article in Journal of neurotrauma, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
5.0field-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

37 citing papers in PubMed, 48 citations in OpenAlex.

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  16. Assessment of Blood-Brain Barrier Integrity Using Dyes and Tracers.Methods in molecular biology (Clifton, N.J.) · 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

4 authors at 3 institutions in 1 country.

Kijana K GeorgeFralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, Virginia, USA.
Benjamin P HeithoffFralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, Virginia, USA.
Oleksii ShandraFralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, Virginia, USA.
Stefanie RobelFralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, Virginia, USA.
University of Alabama at Birmingham · USBiomedical Research Institute · USCarilion Roanoke Memorial Hospital · US

Funding

Evaluating astrocyte loss after traumatic brain injury in initiation of post-traumatic epilepsyR01NS105807 · NINDS · VIRGINIA POLYTECHNIC INST AND ST UNIV · PI ROBEL, STEFANIE · 2018 to 2022
$1.9M
6 · The paper itself

Abstract

Mild traumatic brain injury/concussion (mTBI) accounts for 70-90% of all reported TBI cases and causes long-lasting neurological consequences in 10-40% of patients. Recent clinical studies revealed increased blood-brain barrier (BBB) permeability in mTBI patients, which correlated with secondary damage after mTBI. However, the cascade of cellular events initiated by exposure to blood-borne factors resulting in sustained damage is not fully understood. We previously reported that astrocytes respond atypically to mTBI, rapidly losing many proteins essential to their homeostatic function, while classic scar formation does not occur. Here, we tested the hypothesis that mTBI-induced BBB damage causes atypical astrocytes through exposure to blood-borne factors. Using an mTBI mouse model, two-photon imaging, an endothelial cell-specific genetic ablation approach, and serum-free primary astrocyte cultures, we demonstrated that areas with atypical astrocytes coincide with BBB damage and that exposure of astrocytes to plasma proteins is sufficient to initiate loss of astrocyte homeostatic proteins. Although mTBI resulted in frequent impairment of both physical and metabolic BBB properties and leakage of small-sized blood-borne factors, deposition of the coagulation factor fibrinogen or vessel rupture were rare. Surprisingly, even months after mTBI, BBB repair did not occur in areas with atypical astrocytes. Together, these findings implicate that even relatively small BBB disturbances are sustained long term, and render nearby astrocytes dysfunctional, likely at the cost of neuronal health and function.

Indexed as

Blood-Brain BarrierBrain ConcussionAnimalsAstrocytesHumansMiceastrogliosisBBB repairbrain injurybrain vasculaturerepeated mild TBItight junctions

Identifiers

PMID34806422
PMCPMC8785769
OpenAlexW3216436000

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.