Evidence map›Paper›PMID 32385683›Full record

ArticleJournal of neurology2020

Neurofilament light chain as a potential biomarker of disease status in Friedreich ataxia.

Alexandra Clay, Kristin M Obrochta, Russell K Soon, Christopher B Russell, David R Lynch

Abstract read
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In one paragraph

Article in Journal of neurology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.0field-weighted citation impact, top 28% 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

16 citing papers in PubMed, 16 citations in OpenAlex.

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  5. Increase of Plasma Biomarkers in Friedreich's Ataxia: Potential Insights into Disease Pathology.Movement disorders : official journal of the Movement Disorder Society · 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

5 authors at 2 institutions in 1 country.

Alexandra ClayDepartment of Pediatrics and Neurology, The Children's Hospital of Philadelphia; Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
Kristin M ObrochtaBioMarin Pharmaceutical Inc, 770 Lindaro Street, San Rafael, CA, 94901, USA.ORCID http://orcid.org/0000-0002-6090-7013
Russell K SoonBioMarin Pharmaceutical Inc, 770 Lindaro Street, San Rafael, CA, 94901, USA.
Christopher B RussellBioMarin Pharmaceutical Inc, 770 Lindaro Street, San Rafael, CA, 94901, USA.ORCID http://orcid.org/0000-0002-0240-1815
David R LynchDepartment of Pediatrics and Neurology, The Children's Hospital of Philadelphia; Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA. lynchd@mail.med.upenn.edu.ORCID http://orcid.org/0000-0001-7168-214X
BioMarin (United States) · USChildren's Hospital of Philadelphia · US

Funding

Friedreich's Ataxia Research Alliance 0001
6 · The paper itself

Abstract

backgroundThe present study evaluates serum neurofilament light chain (NfL) as a biomarker of disease features in Friedreich's ataxia (FRDA).

methodsNfL levels from serum of 117 subjects (85 FRDA patients, 13 carriers, and 19 controls) were assayed and correlated with disease features such as smaller GAA repeat length (GAA1), age, sex, and level of neurological dysfunction.

resultsMean serum NfL levels were higher in FRDA patients than in carriers or unaffected controls in two independent cohorts of subjects. In longitudinal samples from FRDA patients drawn monthly or 1 year apart, values changed minimally. No difference was noted between carriers and controls. NfL levels correlated positively with age in controls and carriers of similar age, (Rs = 0.72, p < 0.0005), whereas NfL levels inversely correlated with age in FRDA patients (Rs =  - 0.63, p < 0.001). NfL levels were not associated with sex or GAA1 length in patients, and linear regression revealed a significant relationship between NfL levels in the cohort with age (coefficient =  - 0.36, p < 0.001), but not sex (p = 0.64) or GAA1 (p = 0.13).

conclusionBecause NfL is elevated in patients, but decreases with age and disease progression, our results suggest that age is the critical determinant of NfL in FRDA (rather than clinical or genetic severity).

Indexed as

Friedreich AtaxiaBiomarkersDisease ProgressionHeterozygoteHumansIntermediate FilamentsNeurofilament ProteinsBiomarkersNeurofilament ProteinsAxonBiomarkerFriedreich’s ataxiaNeurofilament light chain

Identifiers

PMID32385683
OpenAlexW3023892463

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.