Evidence map›Paper›PMID 33594224›Full record

ArticleScientific reports2021

Extracellular vesicle concentrations of glial fibrillary acidic protein and neurofilament light measured 1 year after traumatic brain injury.

Spencer Flynn, Jacqueline Leete, Pashtun Shahim, Cassandra Pattinson, Vivian A Guedes, Chen Lai, Christina Devoto, Bao-Xi Qu, Kisha Greer, Brian Moore and 4 more

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
3.5field-weighted citation impact, top 6% 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

19 citing papers in PubMed, 37 citations in OpenAlex.

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  12. Traumatic Brain Injury Biomarkers, Simulations and Kinetics.Bioengineering (Basel, Switzerland) · 2022
    Article
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  14. Article
  15. Blood Biomarkers in Brain Injury Medicine.Current physical medicine and rehabilitation reports · 2022
    Article
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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

14 authors at 5 institutions in 1 country.

Spencer Flynn *Rehabilitation Medicine Department, National Institutes of Health Clinical Center, Bethesda, MD, USA.
Jacqueline Leete *National Institute of Nursing Research, National Institutes of Health, Bethesda, MD, USA.
Pashtun ShahimRehabilitation Medicine Department, National Institutes of Health Clinical Center, Bethesda, MD, USA. pashtun-poh.shahim@nih.gov.
Cassandra PattinsonNational Institute of Nursing Research, National Institutes of Health, Bethesda, MD, USA.
Vivian A GuedesNational Institute of Nursing Research, National Institutes of Health, Bethesda, MD, USA.
Chen LaiNational Institute of Nursing Research, National Institutes of Health, Bethesda, MD, USA.
Christina DevotoNational Institute of Nursing Research, National Institutes of Health, Bethesda, MD, USA.
Bao-Xi QuNational Institute of Nursing Research, National Institutes of Health, Bethesda, MD, USA.
Kisha GreerNational Institute of Nursing Research, National Institutes of Health, Bethesda, MD, USA.
Brian MooreCenter for Neuroscience and Regenerative Medicine, Bethesda, MD, USA.
Andre van der MerweCenter for Neuroscience and Regenerative Medicine, Bethesda, MD, USA.
Vindhya EkanayakeCenter for Neuroscience and Regenerative Medicine, Bethesda, MD, USA.
Jessica GillNational Institute of Nursing Research, National Institutes of Health, Bethesda, MD, USA.
Leighton ChanRehabilitation Medicine Department, National Institutes of Health Clinical Center, Bethesda, MD, USA.
National Institute of Nursing Research · USNational Institutes of Health · USNational Institutes of Health Clinical Center · USCenter for Neuroscience and Regenerative Medicine · USHenry M. Jackson Foundation · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Traumatic brain injury (TBI) is linked to long-term symptoms in a sub-set of patients who sustain an injury, but this risk is not universal, leading us and others to question the nature of individual variability in recovery trajectories. Extracellular vesicles (EVs) are a promising, novel avenue to identify blood-based biomarkers for TBI. Here, our aim was to determine if glial fibrillary acidic protein (GFAP) and neurofilament light (NfL) measured 1-year postinjury in EVs could distinguish patients from controls, and whether these biomarkers relate to TBI severity or recovery outcomes. EV GFAP and EV NfL were measured using an ultrasensitive assay in 72 TBI patients and 20 controls. EV GFAP concentrations were elevated in moderate and severe TBI compared to controls (p's < 0.001) and could distinguish controls from moderate (AUC = 0.86) or severe TBI (AUC = 0.88). Increased EV GFAP and EV NfL levels were associated with lower 1-year Glasgow Outcome Scale-Extended (GOS-E) score (p's < 0.05). These findings suggest that blood-derived EV concentrations of GFAP and NfL drawn even 1 year after injury are higher in TBI patients compared to controls, and are related to injury severity and poor recovery outcomes, suggesting that TBIs alter the activity of these biomarkers, likely contributing to individual variability in recovery.

Indexed as

Recovery of FunctionAdultAgedAged, 80 and overBiomarkersBrain Injuries, TraumaticCase-Control StudiesExtracellular VesiclesFemaleGlial Fibrillary Acidic ProteinHumansMaleMiddle AgedNeurofilament ProteinsYoung AdultBiomarkersGFAP protein, humanGlial Fibrillary Acidic Proteinneurofilament protein LNeurofilament Proteins

Identifiers

PMID33594224
PMCPMC7887207
OpenAlexW3131642886

What OpenQuestion holds

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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.