Assessment of sleep in children with mucopolysaccharidosis type III
Actigraphy; Adolescent; Case-Control Studies; Child; Preschool; Female; Humans; Male; Melatonin/me [Metabolism]; Mucopolysaccharidosis III/pp [Physiopathology]; Sleep/ph [Physiology]; Time Factors; JL5DK93RCL (Melatonin); sleep disturbance/disorders; MPSIIIA; MPSIIIB; trajectory; characteristics
Sleep disturbances are prevalent in mucopolysaccharidosis Type III (MPS III), yet there is a lack of objective, ecologically valid evidence detailing sleep quantity, quality or circadian system. Eight children with MPS III and eight age-matched typically developing children wore an actigraph for 7-10 days/nights. Saliva samples were collected at three time-points on two separate days, to permit analysis of endogenous melatonin levels. Parents completed a sleep questionnaire and a daily sleep diary. Actigraphic data revealed that children with MPS III had significantly longer sleep onset latencies and greater daytime sleep compared to controls, but night-time sleep duration did not differ between groups. In the MPS III group, sleep efficiency declined, and sleep onset latency increased, with age. Questionnaire responses showed that MPS III patients had significantly more sleep difficulties in all domains compared to controls. Melatonin concentrations showed an alteration in the circadian system in MPS III, which suggests that treatment for sleep problems should attempt to synchronise the sleep-wake cycle to a more regular pattern. Actigraphy was tolerated by children and this monitoring device can be recommended as a measure of treatment success in research and clinical practice.
Mahon L V; Lomax M; Grant S; Cross E; Hare D J; Wraith J E; Jones S; Bigger B; Langford-Smith K; Canal M
PLoS ONE
2014
Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1371/journal.pone.0084128" target="_blank" rel="noreferrer noopener">10.1371/journal.pone.0084128</a>
An investigation of the middle and latebehavioural phenotypes of Mucopolysaccharidosis Type-III
health sciences; digital collections; electronic information; information dissemination; life sciences; medical research; scientific information; behavioral problems; MPS III; trajectory; characteristics; challenging behaviors
PubMed Central Canada (PMC Canada) provides free access to a stable and permanent online digital archive of full-text, peer-reviewed health and life sciences research publications. It builds on PubMed Central (PMC), the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature and is a member of the broader PMC International (PMCI) network of e-repositories.
Cross E M; Grant S; Jones S; Bigger B W; Wraith J E; Mahon L V; Lomax M; Hare D J; Canada Government of Canada National Research Council
Journal of Neurodevelopmental Disorders
2014
Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1186/1866-1955-6-46" target="_blank" rel="noreferrer noopener">10.1186/1866-1955-6-46</a>
Behavioural phenotypes of the mucopolysaccharide disorders: a systematic literature review of cognitive, motor, social, linguistic and behavioural presentation in the MPS disorders
children; Medicine; Endocrinology & Metabolism; Genetics & Heredity; Research & Experimental; syndrome; mental-retardation; annotation; clinical variability; hunters; mild; sanfilippo b-disease; behavior; tone and motor problems; MPSI; MPSII; MPSIIIA; MPSIIIB; trajectory; characteristics; sleep disturbance; challenging behavior
The mucopolysaccharide disorders (MPS) are a group of recessively inherited metabolic disorders resulting in progressive physical and cognitive decline. MEDLINE, PsycINFO and Embase databases were searched, alongside manual screening, to identify relevant literature. Papers were included in the review if they were published in a peer reviewed journal and conducted empirical research into cognitive, motor, social or linguistic development or behaviour in one or more MPS disorders. Twenty-five papers were reviewed. Two papers used methodology of a sufficiently high standard to demonstrate a behavioural phenotype; both found sleep disturbance to be part of the phenotype of MPS III. Fearfulness and sleep disturbance were frequently observed in people with MPS I and II. Cognitive and motor impairment and decline, and challenging behaviour were highly prevalent in the severe form of MPS II. Cognitive decline and severe behavioural problems relating to aggression, hyperactivity, orality, unusual affect and temper tantrums were seen in MPS III. Sleep disturbance is part of the behavioural phenotype of MPS III, and challenging behaviour is highly prevalent in MPS II and MPS III, therefore the efficacy of behavioural interventions for these populations should be investigated. Further research into the behaviour and adaptive skills of children with MPS III and MPS IV is required.
Cross E M; Hare D J
Journal of Inherited Metabolic Disease
2013
Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1007/s10545-012-9572-0" target="_blank" rel="noreferrer noopener">10.1007/s10545-012-9572-0</a>
Actigraphic investigation of circadian rhythm functioning and activity levels in children with mucopolysaccharidosis type III (Sanfilippo syndrome)
Actigraphy; Sleep; rare disease; Neurosciences & Neurology; controlled-trial; intellectual disability; disturbance; melatonin; autistic spectrum disorders; Circadian rhythms; light; Mucopolysaccharidosis type III; multiple disabilities; Sanfilippo; sleep problems; smith-magenis-syndrome; therapy; sleep disturbance/disorders; MPSIIIA; MPSIIIB; trajectory; characteristics
Background: Sleep disturbance is part of the behavioural phenotype of the rare genetic condition mucopolysaccharidosis (MPS) type III. A growing body of evidence suggests that underlying disturbance in circadian rhythm functioning may explain sleep problems within the MPS III population. Methods: Actigraphic data were recorded in eight children with MPS III over 7-10 days and compared to age-matched typically developing controls. Parameters of circadian rhythmicity and activity levels across a 24-h period were analysed. Results: Statistically and clinically significant differences between the two groups were noted. Analysis indicated that children with MPS III showed significantly increased fragmentation of circadian rhythm and reduced stability with external cues (zeitgebers), compared to controls. Average times of activity onset and offset were indicative of a phase delayed sleep-wake cycle for some children in the MPS III group. Children with MPS III had significantly higher activity levels during the early morning hours (midnight-6 am) compared to controls. Conclusions: Results are consistent with previous research into MPS III and suggest that there is an impairment in circadian rhythm functioning in children with this condition. Implications for clinical practice and the management of sleep difficulties are discussed.
Mumford R A; Mahon L V; Jones S; Bigger B; Canal M; Hare D J
Journal of Neurodevelopmental Disorders
2015
Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1186/s11689-015-9126-5" target="_blank" rel="noreferrer noopener">10.1186/s11689-015-9126-5</a>