Evidence map›Paper›PMID 34482646›Full record

ArticleAnnals of clinical and translational neurology2021

Serum neurofilament light chain in pediatric spinal muscular atrophy patients and healthy children.

Elisa Nitz, Martin Smitka, Jens Schallner, Katja Akgün, Tjalf Ziemssen, Maja von der Hagen, Victoria Tüngler

Open access · goldAbstract read
In one paragraph

Article in Annals of clinical and translational neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed, 1 pooled it
5.9field-weighted citation impact, top 3% 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

45 citing papers in PubMed, 1 synthesis or guideline pooled it, 62 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Review
  9. Article
  10. Application of Biomarkers in Spinal Muscular Atrophy.International journal of molecular sciences · 2025
    Review
  11. Clinical use and reporting of neurofilament quantification in neurological disorders: A global overview.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Review
  19. Peripheral defects precede neuromuscular pathology in theJournal of neuromuscular diseases · 2024
    Article
  20. Review
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

7 authors at 2 institutions in 1 country.

Elisa NitzDepartment of Neuropediatrics, Medizinische Fakultät, Technische Universität Dresden, Dresden, Germany.
Martin SmitkaDepartment of Neuropediatrics, Medizinische Fakultät, Technische Universität Dresden, Dresden, Germany.
Jens SchallnerDepartment of Neuropediatrics, Medizinische Fakultät, Technische Universität Dresden, Dresden, Germany.
Katja AkgünDepartment of Neurology, Center of Clinical Neuroscience, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
Tjalf ZiemssenDepartment of Neurology, Center of Clinical Neuroscience, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
Maja von der HagenDepartment of Neuropediatrics, Medizinische Fakultät, Technische Universität Dresden, Dresden, Germany.
Victoria TünglerDepartment of Neuropediatrics, Medizinische Fakultät, Technische Universität Dresden, Dresden, Germany.ORCID 0000-0003-3486-2824
Technische Universität Dresden · DEUniversity Hospital Carl Gustav Carus · DE

Funding

Technische Universität Dresden MeDDrive 60432
6 · The paper itself

Abstract

objectiveThe aim of this study was to evaluate neurofilament light chain as blood biomarker for disease activity in children and adolescents with different types of spinal muscular atrophy (SMA) and establish pediatric reference values.

methodsWe measured neurofilament light chain levels in serum (sNfL) and cerebral spinal fluid (cNfL) of 18 children with SMA and varying numbers of SMN2 copies receiving nusinersen by single-molecule array (SiMoA) assay and analyzed correlations with baseline characteristics and motor development. Additionally, we examined sNfL in 97 neurologically healthy children.

resultsMedian sNfL levels in treatment-naïve SMA patients with 2 SMN2 copies are higher than in those with >2 SMN2 copies (P < 0.001) as well as age-matched controls (P = 0.010) and decline during treatment. The median sNfL concentration of healthy controls is 4.73 pg/mL with no differences in sex (P = 0.486) but age (P < 0.001). In all children with SMA, sNfL levels correlate strongly with cNfL levels (r = 0.7, P < 0.001). In children with SMA and 2 SMN2 copies, sNfL values correlate with motor function (r = -0.6, P = 0.134), in contrast to older SMA children with >2 SMN2 copies (r = -0.1, P = 0.744).

interpretationReference sNfL values of our large pediatric control cohort may be applied for future studies. Strong correlations between sNfL and cNfL together with motor function suggest that sNfL may be a suitable biomarker for disease activity in children with 2 SMN2 copies and those with >2 SMN2 copies within their initial stages during early childhood.

Indexed as

AdolescentBiomarkersChildChild, PreschoolCohort StudiesFemaleHumansInfantInfant, NewbornMaleMuscular Atrophy, SpinalNeurofilament ProteinsBiomarkersneurofilament protein LNeurofilament Proteins

Identifiers

PMID34482646
PMCPMC8528467
OpenAlexW3198859173

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Registered trials

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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.