Evidence map›Paper›PMID 33723284›Full record

ArticleScientific reports2021

Low dystrophin variability between muscles and stable expression over time in Becker muscular dystrophy using capillary Western immunoassay.

Z Koeks, A A Janson, C Beekman, M Signorelli, H A van Duyvenvoorde, J C van den Bergen, M T Hooijmans, I Alleman, I M Hegeman, J J G M Verschuuren 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 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.2field-weighted citation impact, top 22% 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, 22 citations in OpenAlex.

  1. Article
  2. Review
  3. Quantification of Dystrophin Expression by Capillary Immunoassay.Methods in molecular biology (Clifton, N.J.) · 2026
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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 3 institutions in 1 country.

Z KoeksDepartment of Neurology, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands.
A A JansonBioMarin Nederland BV, Leiden, The Netherlands.
C BeekmanBioMarin Nederland BV, Leiden, The Netherlands.
M SignorelliDepartment of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands.
H A van DuyvenvoordeDepartment of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands.
J C van den BergenDepartment of Neurology, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands.
M T HooijmansDepartment of Radiology, Leiden University Medical Center, C.J. Gorter Center for High Field MRI, Leiden, The Netherlands.
I AllemanDepartment of Physiotherapy, Leiden University Medical Center, Leiden, The Netherlands.
I M HegemanDepartment of Neurology, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands.
J J G M VerschuurenDepartment of Neurology, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands.
J C V DeutekomBioMarin Nederland BV, Leiden, The Netherlands.
P SpitaliDepartment of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.
N A DatsonBioMarin Nederland BV, Leiden, The Netherlands.
E H NiksDepartment of Neurology, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands. E.H.Niks@lumc.nl.
Leiden University Medical Center · NLBioMarin (Netherlands) · NLDuchenne Parent Project · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Becker muscular dystrophy (BMD) is the milder allelic variant of Duchenne muscular dystrophy, with higher dystrophin levels. To anticipate on results of interventions targeting dystrophin expression it is important to know the natural variation of dystrophin expression between different muscles and over time. Dystrophin was quantified using capillary Western immunoassay (Wes) in the anterior tibial (TA) muscle of 37 BMD patients. Variability was studied using two samples from the same TA biopsy site in nine patients, assessing nine longitudinal TA biopsies, and eight simultaneously obtained vastus lateralis (VL) muscle biopsies. Measurements were performed in duplicate with two primary antibodies. Baseline dystrophin levels were correlated to longitudinal muscle strength and functional outcomes. Results showed low technical variability and high precision for both antibodies. Dystrophin TA levels ranged from 4.8 to 97.7%, remained stable over a 3-5 year period, and did not correlate with changes in longitudinal muscle function. Dystrophin levels were comparable between TA and VL muscles. Intra-muscle biopsy variability was low (5.2% and 11.4% of the total variability of the two antibodies). These observations are relevant for the design of clinical trials targeting dystrophin production, and may urge the need for other biomarkers or surrogate endpoints.

Indexed as

BiomarkersGene ExpressionImmunoassayAdolescentAdultAgedBiopsyChildChild, PreschoolDystrophinHumansInfantMiddle AgedMuscle, SkeletalMuscular Dystrophy, DuchenneMutationBiomarkersDystrophin

Identifiers

PMID33723284
PMCPMC7971009
OpenAlexW3139283335

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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.