Evidence map›Paper›PMID 29321033›Full record

ArticleOrphanet journal of rare diseases2018

Environmental enrichment intervention for Rett syndrome: an individually randomised stepped wedge trial.

Jenny Downs, Jenny Rodger, Chen Li, Xuesong Tan, Nan Hu, Kingsley Wong, Nicholas de Klerk, Helen Leonard

Open access · goldAbstract read
In one paragraph

Article in Orphanet journal of rare diseases, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 2 pooled it
7.6field-weighted citation impact, top 2% 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

37 citing papers in PubMed, 2 syntheses or guidelines pooled it, 65 citations in OpenAlex.

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  8. Characterizing circulating biomarkers for childhood dementia disorders: A scoping review of clinical trials.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2025
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  20. Rett Syndrome andNeuropsychiatric disease and treatment · 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

8 authors at 3 institutions in 2 countries.

Jenny DownsTelethon Kids Institute, The University of Western Australia, PO Box 855, West Perth, WA, 6872, Australia. Jenny.Downs@telethonkids.org.au.ORCID 0000-0001-7358-9037
Jenny RodgerSchool of Biological Sciences, The University of Western Australia, WA, Perth, Australia.
Chen LiDepartment of Neurology, Shenzhen Children's Hospital, Shenzhen, China.
Xuesong TanRett Syndrome Comprehensive Research Institute, Shenzhen, China.
Nan HuTelethon Kids Institute, The University of Western Australia, PO Box 855, West Perth, WA, 6872, Australia.
Kingsley WongTelethon Kids Institute, The University of Western Australia, PO Box 855, West Perth, WA, 6872, Australia.
Nicholas de KlerkTelethon Kids Institute, The University of Western Australia, PO Box 855, West Perth, WA, 6872, Australia.
Helen LeonardTelethon Kids Institute, The University of Western Australia, PO Box 855, West Perth, WA, 6872, Australia.
The Kids Research Institute Australia · AUShenzhen Children's Hospital · CNThe University of Western Australia · AU

Funding

Rettsyndrome.org 3202
6 · The paper itself

Abstract

backgroundRett syndrome is caused by a pathogenic mutation in the MECP2 gene with major consequences for motor and cognitive development. One of the effects of impaired MECP2 function is reduced production of Brain Derived Neurotrophic Factor (BDNF), a protein required for normal neuronal development. When housed in an enriched environment, MECP2 null mice improved motor abilities and increased levels of BDNF in the brain. We investigated the effects of environmental enrichment on gross motor skills and blood BDNF levels in girls with Rett syndrome.

methodsA genetically variable group of 12 girls with a MECP2 mutation and younger than 6 years participated in a modified individually randomised stepped wedge design study. Assessments were conducted on five occasions, two during the baseline period and three during the intervention period. Gross motor function was assessed using the Rett Syndrome Gross Motor Scale (maximum score of 45) on five occasions, two during the baseline period and three during the intervention period. Blood levels of BDNF were measured at the two baseline assessments and at the end of the intervention period. The intervention comprised motor learning and exercise supplemented with social, cognitive and other sensory experiences over a six-month period.

resultsAt the first assessment, the mean (SD) age of the children was 3 years (1 year 1 month) years ranging from 1 year 6 months to 5 years 2 months. Also at baseline, mean (SD) gross motor scores and blood BDNF levels were 22.7/45 (9.6) and 165.0 (28.8) ng/ml respectively. Adjusting for covariates, the enriched environment was associated with improved gross motor skills (coefficient 8.2, 95%CI 5.1, 11.2) and a 321.4 ng/ml (95%CI 272.0, 370.8) increase in blood BDNF levels after 6 months of treatment. Growth, sleep quality and mood were unaffected.

conclusionsBehavioural interventions such as environmental enrichment can reduce the functional deficit in Rett syndrome, contributing to the evidence-base for management and further understanding of epigenetic mechanisms. Environmental enrichment will be an important adjunct in the evaluation of new drug therapies that use BDNF pathways because of implications for the strengthening of synapses and improved functioning.

trial registrationACTRN12615001286538 .

Indexed as

AnimalsBrain-Derived Neurotrophic FactorChildChild, PreschoolDisease Models, AnimalFemaleHumansInfantLinear ModelsMaleMethyl-CpG-Binding Protein 2MiceMice, KnockoutMutationNeurodevelopmental DisordersRett SyndromeBrain-Derived Neurotrophic FactorMethyl-CpG-Binding Protein 2BDNFEnvironmental enrichmentNeurodevelopmental disorderNeuroplasticityRett syndrome

Identifiers

PMID29321033
PMCPMC5764021
OpenAlexW2782616554

What OpenQuestion holds

Textmetadata
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.