Evidence map›Paper›PMID 30945774›Full record

ArticleAnnals of neurology2019

Schwann cell transcript biomarkers for hereditary neuropathy skin biopsies.

John Svaren, John J Moran, Xingyao Wu, Riccardo Zuccarino, Chelsea Bacon, Yunhong Bai, Raghu Ramesh, Laurie Gutmann, Daniel M Anderson, Derek Pavelec and 1 more

Open access · greenAbstract read
In one paragraph

Article in Annals of neurology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
1.6field-weighted citation impact, top 19% 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

22 citing papers in PubMed, 33 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Charcot-Marie-Tooth disease and related neuropathies.Nature reviews. Disease primers · 2026
    Review
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  6. Article
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  8. Review
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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 2 institutions in 2 countries.

John SvarenWaisman Center, University of Wisconsin-Madison, Madison, WI.ORCID 0000-0003-2963-7921
John J MoranWaisman Center, University of Wisconsin-Madison, Madison, WI.
Xingyao WuDepartment of Neurology, University of Iowa Carver College of Medicine, Iowa City, IA.
Riccardo ZuccarinoDepartment of Neurology, University of Iowa Carver College of Medicine, Iowa City, IA.
Chelsea BaconDepartment of Neurology, University of Iowa Carver College of Medicine, Iowa City, IA.
Yunhong BaiDepartment of Neurology, University of Iowa Carver College of Medicine, Iowa City, IA.
Raghu RameshWaisman Center, University of Wisconsin-Madison, Madison, WI.
Laurie GutmannDepartment of Neurology, University of Iowa Carver College of Medicine, Iowa City, IA.
Daniel M AndersonDepartment of Neurology, University of Iowa Carver College of Medicine, Iowa City, IA.
Derek PavelecBiotechnology Center, University of Wisconsin-Madison, Madison, WI.
Michael E ShyDepartment of Neurology, University of Iowa Carver College of Medicine, Iowa City, IA.
University of Iowa · USUniversity of Wisconsin–Madison · US

Funding

trainingU54NS065712 · NINDS · WAYNE STATE UNIVERSITY · PI SHY, MICHAEL E. · 2009 to 2023
$19.6M
Waisman Intellectual and Developmental Disabilities Research Center Down Syndrome RegistryU54HD090256 · NICHD · UNIVERSITY OF WISCONSIN-MADISON · PI ZHAO, XINYU · 2016 to 2020
$6.0M
Clinical Trial Readiness for Rare Diseases, Disorders and SyndromesR21TR003034 · NCATS · UNIVERSITY OF IOWA · PI SHY, MICHAEL E. · 2019 to 2020
$418k
Charcot-Marie-Tooth AssociationNCATS NIH HHS R21 TR003034NICHD NIH HHS U54 HD090256NINDS NIH HHS U54 NS065712
6 · The paper itself

Abstract

objectiveCharcot-Marie-Tooth (CMT) disease is most commonly caused by duplication of a chromosomal segment surrounding Peripheral Myelin Protein 22, or PMP22 gene, which is classified as CMT1A. Several candidate therapies reduce Pmp22 mRNA levels in CMT1A rodent models, but development of biomarkers for clinical trials in CMT1A is a challenge given its slow progression and difficulty in obtaining nerve samples. Quantitative PCR measurements of PMP22 mRNA in dermal nerves were performed using skin biopsies in human clinical trials for CMT1A, but this approach did not show increased PMP22 mRNA in CMT1A patients compared to controls. One complicating factor is the variable amounts of Schwann cells (SCs) in skin. The objective of the study was to develop a novel method for precise evaluation of PMP22 levels in skin biopsies that can discriminate CMT1A patients from controls.

methodsWe have developed methods to normalize PMP22 transcript levels to SC-specific genes that are not altered by CMT1A status. Several CMT1A-associated genes were assembled into a custom Nanostring panel to enable precise transcript measurements that can be normalized to variable SC content.

resultsThe digital expression data from Nanostring analysis showed reproducible elevation of PMP22 levels in CMT1A versus control skin biopsies, particularly after normalization to SC-specific genes.

interpretationThis platform should be useful in clinical trials for CMT1A as a biomarker of target engagement that can be used to optimize dosing, and the same normalization framework is applicable to other types of CMT. ANN NEUROL 2019;85:887-898.

Indexed as

AdolescentAdultAgedAnimalsBiomarkersBiopsyCharcot-Marie-Tooth DiseaseFemaleHumansMaleMiceMiddle AgedMyelin ProteinsSchwann CellsSkinYoung AdultBiomarkersMyelin ProteinsPMP22 protein, human

Identifiers

PMID30945774
PMCPMC7050273
OpenAlexW2933505114

What OpenQuestion holds

Textmetadata
LicenceTDM
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.