Evidence map›Paper›PMID 29189923›Full record

ArticleJournal of neurology2018

Congenital myasthenic syndrome with episodic apnoea: clinical, neurophysiological and genetic features in the long-term follow-up of 19 patients.

Grace McMacken, Roger G Whittaker, Teresinha Evangelista, Angela Abicht, Marina Dusl, Hanns Lochmüller

Open access · hybridAbstract read
In one paragraph

Article in Journal of neurology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

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

  1. Pooled it
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  7. Mild phenotype ofFrontiers in pediatrics · 2024
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  14. Central Apneas Due to the CLIFAHDD Syndrome Successfully Treated with Pyridostigmine.International journal of environmental research and public health · 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

6 authors at 3 institutions in 2 countries.

Grace McMackenJohn Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK. grace.mcmacken@ncl.ac.uk.ORCID http://orcid.org/0000-0001-8025-7989
Roger G WhittakerInstitute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK.
Teresinha EvangelistaJohn Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK.
Angela AbichtFriedrich-Baur-Institute, Ludwig Maximilians University, Munich, Germany.
Marina DuslFriedrich-Baur-Institute, Ludwig Maximilians University, Munich, Germany.ORCID http://orcid.org/0000-0001-5182-2141
Hanns LochmüllerJohn Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK.ORCID http://orcid.org/0000-0003-2324-8001
Newcastle University · GBFriedrich Baur Stiftung · DEMuscular Dystrophy UK · GB

Funding

Medical Research Council 98482Medical Research Council G1002274Wellcome TrustWellcome Trust 201064/Z/16/Z
6 · The paper itself

Abstract

backgroundCongenital myasthenic syndrome with episodic apnoea (CMS-EA) is a rare but potentially treatable cause of apparent life-threatening events in infancy. The underlying mechanisms for sudden and recurrent episodes of respiratory arrest in these patients are unclear. Whilst CMS-EA is most commonly caused by mutations in CHAT, the list of associated genotypes is expanding.

methodsWe reviewed clinical information from 19 patients with CMS-EA, including patients with mutations in CHAT, SLC5A7 and RAPSN, and patients lacking a genetic diagnosis.

resultsLack of genetic diagnosis was more common in CMS-EA than in CMS without EA (56% n = 18, compared to 7% n = 97). Most patients manifested intermittent apnoea in the first 4 months of life (74%, n = 14). A degree of clinical improvement with medication was observed in most patients (74%, n = 14), but the majority of cases also showed a tendency towards complete remission of apnoeic events with age (mean age of resolution 2 years 5 months). Signs of impaired neuromuscular transmission were detected on neurophysiology studies in 79% (n = 15) of cases, but in six cases, this was only apparent following specific neurophysiological testing protocols (prolonged high-frequency stimulation).

conclusionsA relatively large proportion of CMS-EA remains genetically undiagnosed, which suggests the existence of novel causative CMS genes which remain uncharacterised. In light of the potential for recurrent life-threatening apnoeas in early life and the positive response to therapy, early diagnostic consideration of CMS-EA is critical, but without specific neurophysiology tests, it may go overlooked.

Indexed as

AcetylcholinesteraseAdolescentAdultAntibodiesApneaChildChild, PreschoolCholine O-AcetyltransferaseCholinesterase InhibitorsCollagenCreatine KinaseFemaleHumansInfantLongitudinal StudiesMaleAcetylcholinesteraseAntibodiesCholine O-AcetyltransferaseCholinesterase InhibitorsCHRNE protein, humanCollagenCOLQ protein, humanCreatine KinaseMuscle ProteinsMYO9A protein, humanMyosinsperipheral membrane protein 43KReceptors, CholinergicReceptors, NicotinicSLC5A7 protein, humanSymportersCongenital myasthenic syndromeNeuromuscular diseaseNeuromuscular junctionNeurophysiology

Identifiers

PMID29189923
PMCPMC5760613
OpenAlexW2774014298

What OpenQuestion holds

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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.