Evidence map›Paper›PMID 25758715›Full record

ArticleOrphanet journal of rare diseases2015

Prevalence of inherited neurotransmitter disorders in patients with movement disorders and epilepsy: a retrospective cohort study.

Saadet Mercimek-Mahmutoglu, Sarah Sidky, Keith Hyland, Jaina Patel, Elizabeth J Donner, William Logan, Roberto Mendoza-Londono, Mahendranath Moharir, Julian Raiman, Andreas Schulze and 3 more

Open access · goldAbstract read
In one paragraph

Article in Orphanet journal of rare diseases, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.9field-weighted citation impact, top 16% 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

11 citing papers in PubMed, 28 citations in OpenAlex.

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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

13 authors at 3 institutions in 1 country.

Saadet Mercimek-MahmutogluDivision of Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. saadet.mahmutoglu@sickkids.ca.
Sarah SidkyDivision of Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. sarah.sidky@sickkids.ca.
Keith HylandMedical Neurogenetics, LLC, Atlanta, GA, USA. khyland@mnglab.com.
Jaina PatelDivision of Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. jaina.patel@sickkids.ca.
Elizabeth J DonnerDivision of Neurology, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. elizabeth.donner@sickkids.ca.
William LoganDivision of Neurology, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. william.logan@sickkids.ca.
Roberto Mendoza-LondonoDivision of Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. roberto.mendoza@sickkids.ca.
Mahendranath MoharirDivision of Neurology, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. mahendranath.moharir@sickkids.ca.
Julian RaimanDivision of Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. julian.raiman@sickkids.ca.
Andreas SchulzeDivision of Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. andreas.schulze@sickkids.ca.
Komudi SiriwardenaDivision of Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. komudi.siriwardena@sickkids.ca.
Grace YoonDivision of Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada. grace.yoon@sickkids.ca.
Lianna KyriakopoulouBiochemical Genetics Laboratory, Department of Laboratory Medicine, University of Toronto, The Hospital for Sick Children, Toronto, Canada. lianna.kyriakopoulou@sickkids.ca.
SickKids Foundation · CAHospital for Sick Children · CAUniversity of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundInherited neurotransmitter disorders are primary defects of neurotransmitter metabolism. The main purpose of this retrospective cohort study was to identify prevalence of inherited neurotransmitter disorders.

methodsThis retrospective cohort study does not have inclusion criteria; rather included all patients who underwent cerebrospinal fluid (CSF) homovanillic and 5-hydroxyindol acetic acid measurements. Patients with CSF neurotransmitter investigations suggestive of an inherited neurotransmitter disorder and patients with normal or non-diagnostic CSF neurotransmitter investigations underwent direct sequencing of single gene disorders.

resultsThere were 154 patients between October 2004 and July 2013. Four patients were excluded due to their diagnosis prior to this study dates. Two major clinical feature categories of patients who underwent lumbar puncture were movement disorders or epilepsy in our institution. Twenty out of the 150 patients (13.3%) were diagnosed with a genetic disorder including inherited neurotransmitter disorders (6 patients) (dihydropteridine reductase, 6-pyruvoyl-tetrahydropterin synthase, guanosine triphosphate cyclohydrolase I, tyrosine hydroxylase, pyridoxine dependent epilepsy due to mutations in the ALDH7A1 gene and pyridoxamine-5-phosphate oxidase deficiencies) and non-neurotransmitter disorders (14 patients).

conclusionPrevalence of inherited neurotransmitter disorders was 4% in our retrospective cohort study. Eight out of the 150 patients (5.3%) had one of the treatable inherited metabolic disorders with favorable short-term neurodevelopmental outcomes, highlighting the importance of an early and specific diagnosis. Whole exome or genome sequencing might shed light to unravel underlying genetic defects of new inherited neurotransmitter disorders in near future.

Indexed as

AdolescentChildChild, PreschoolCohort StudiesDystonic DisordersEpilepsyGene Expression RegulationHumansInfantInfant, NewbornMaleMetabolism, Inborn ErrorsMovement DisordersRetrospective StudiesYoung Adult

Identifiers

PMID25758715
PMCPMC4342151
OpenAlexW2104222586

What OpenQuestion holds

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LicenceCC BY
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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.