Evidence map›Paper›PMID 33517369›Full record

ArticleBrain : a journal of neurology2021

Neurofilament light predicts neurological outcome after subarachnoid haemorrhage.

Patrick Garland, Matt Morton, Ardalan Zolnourian, Andrew Durnford, Ben Gaastra, Jamie Toombs, Amanda J Heslegrave, John More, Henrik Zetterberg, Diederik O Bulters and 1 more

Open access · hybridAbstract read
In one paragraph

Article in Brain : a journal of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
2.2field-weighted citation impact, top 12% 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

18 citing papers in PubMed, 30 citations in OpenAlex.

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  10. Six-month outcomes in patients with hemorrhagic and non-hemorrhagic traumatic disorders of consciousness.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
    Article
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  12. GABAInternational journal of molecular sciences · 2022
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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

11 authors at 5 institutions in 2 countries.

Patrick GarlandClinical Neurosciences, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK.
Matt MortonClinical Neurosciences, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK.
Ardalan ZolnourianWessex Neurological Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK.
Andrew DurnfordWessex Neurological Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK.
Ben GaastraWessex Neurological Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK.
Jamie ToombsUK Dementia Research Institute, University College London, UK.
Amanda J HeslegraveUK Dementia Research Institute, University College London, UK.
John MoreR&D, Bio Products Laboratory Limited, Elstree, Hertfordshire, UK.
Henrik ZetterbergUK Dementia Research Institute, University College London, UK.
Diederik O BultersWessex Neurological Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK.
Ian GaleaClinical Neurosciences, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK.
University Hospital Southampton NHS Foundation Trust · GBUK Dementia Research Institute · GBUniversity of Southampton · GBBio Products Laboratory (United Kingdom) · GBSahlgrenska University Hospital · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

To improve outcome prediction following subarachnoid haemorrhage (SAH), we sought a biomarker integrating early brain injury and multiple secondary pathological processes in a prospective study of 42 non-traumatic SAH patients and 19 control individuals. Neurofilament light (NF-L) was elevated in CSF and serum following SAH. CSF and serum NF-L on Days 1-3 post-SAH strongly predicted modified Rankin score at 6 months, independent of World Federation of Neurosurgical Societies (WFNS) score. NF-L from Day 4 onwards also had a profound impact on outcome. To link NF-L to a SAH-specific pathological process, we investigated NF-L's relationship with extracellular haemoglobin. Most CSF haemoglobin was not complexed with haptoglobin, yet was able to be bound by exogenous haptoglobin i.e. haemoglobin was scavengeable. CSF scavengeable haemoglobin was strongly predictive of subsequent CSF NF-L. Next, we investigated NF-L efflux from the brain after SAH. Serum and CSF NF-L correlated positively. The serum/CSF NF-L ratio was lower in SAH versus control subjects, in keeping with glymphatic efflux dysfunction after SAH. CSF/serum albumin ratio was increased following SAH versus controls. The serum/CSF NF-L ratio correlated negatively with the CSF/serum albumin ratio, indicating that transfer of the two proteins across the blood-brain interface is dissociated. In summary, NF-L is a strong predictive marker for SAH clinical outcome, adding value to the WFNS score, and is a promising surrogate end point in clinical trials.

Indexed as

Recovery of FunctionAdultAgedAged, 80 and overBiomarkersFemaleHumansMaleMiddle AgedNeurofilament ProteinsSubarachnoid HemorrhageBiomarkersneurofilament protein LNeurofilament Proteinsglymphatic systemhaemoglobinhaptoglobinneurofilament lightsubarachnoid haemorrhage

Identifiers

PMID33517369
PMCPMC8041040
OpenAlexW3127807483

What OpenQuestion holds

Textmetadata
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.