View clinical trials related to Smith-Magenis Syndrome.
Filter by:Smith Magenis Syndrome (SMS) is a complex disorder characterized by severe neurological, psychological and behavioral disorders including sleep-wake rhythm disorders. It is a rare disease with a prevalence of 1/25 000. The sleep disorders observed could be the consequence of a general dysregulation of the circadian system, since these patients show an inversion of the melatonin secretion profile. In SMS, the peak of melatonin is observed at 12 o'clock, whereas it is nocturnal in healthy subjects (3-4 o'clock in the morning). Daylight plays a important role in circadian regulation by inducing an inhibition of melatonin secretion via the suprachiasmatic nuclei of the hypothalamus. This mechanism could be affected in SMS children, explaining the lag of melatonin profile. These sleep-wake disturbances cycle could play a significant role in learning deficits and in the frequency and severity of behavioral abnormalities observed in SMS. In this project, investigators propose to study the mechanisms involved in the sleep-wake cycle disorders observed in Smith Magenis children, in particular by evaluating the quality of the pupillary reflex using a pupillometer. The pupillary reflex is a simple and non-invasive method to test light sensitivity and the photobiological mechanisms involved. In this way, investigators want to evaluate the diurnal profile of the pupillary reflex in children with Smith Magenis syndrome in relation to the diurnal melatonin profile. Investigators will complete this study by determining the chronobiological profile of Smith Magenis patients by measuring different variables: - Diurnal cortisol and amylase profile - 24h body temperature and heart rate profile - Urinary cortisol and 6-sulfatoxymelatonin (major metabolite of melatonin) profiles - Daytime sleepiness profile measured subjectively by questionnaire and objectively via a waking EEG recording. - Actimetry at home - Polysomnography - A neurocognitive and behavioural assessment
A significantly higher proportion of patients with rare diseases (RD) with intellectual disability (ID), present hyperphagia, overweight or obesity, compared to the general population. Prader-Willi syndrome is the only genetic obesity identified to date associated with hyperghrelinemia, while ghrelin levels are lower than in controls in other situations of obesity. The aim of the study is to find out whether the levels of ghrelin, which are abnormally high in PWS throughout life, are also high in these RD when people have hyperphagia and/or overweight.
The objective is to develop and test, through an iterative process, an intervention to address and support the development of infants with a confirmed diagnosis of neurogenetic disorders that leave individuals at risk for developmental delays or intellectual and developmental disabilities. The proposed project will capitalize and expand upon existing empirically based interventions designed to improve outcomes for infants with suspected developmental delays. Participants will be infants with a confirmed diagnosis of a neurogenetic disorder (e.g., fragile X, Angelman, Prader-Willi, Dup15q, Phelan-McDermid, Rhett, Smith Magenis, Williams, Turner, Kleinfelter, Down syndromes, Duchenne muscular dystrophy) within the first year of life and their parents/caregivers. The intervention, called Parent-infant Inter(X)action Intervention (PIXI) is a comprehensive program inclusive of parent education about early infant development and the neurogenetic disorder for which they were diagnosed, direct parent coaching around parent-child interaction, and family/parent well-being support. The protocol includes repeated comprehensive assessments of family and child functioning, along with an examination of feasibility and acceptability of the program.
Sleep-Wake and behavioral disorders in Smith Magenis Syndrome (SMS) are strongly linked to an inversion of the nychtemeral secretion of melatonin. This inversion have been described in children with SMS. However its evolution during adulthood remains unknown. The aim of this study is to assess 24hours melatonin levels in 10 adults with SMS in order to optimize medication in adults with SMS
This database will be used to better understand the sleep problems of people with SMS. This clinical database will be a part of a larger Smith-Magenis Patient Registry used to create an awareness campaign around SMS and the sleep disturbances that are characteristic of the disorder.
Open-label Study to Investigate the Pharmacokinetics and Safety of Tasimelteon in Children and Adolescents.
The aim of this study is to investigate tasimelteon vs. placebo on sleep disturbances of individuals with Smith-Magenis Syndrome.
The purpose of this study is to characterize the circadian rhythm disruption experienced by patients as determined by plasma melatonin, cortisol, and other circadian analytes
The goal of this pilot project is to determine whether melatonin levels are disordered in patients with Smith-Magenis Syndrome (SMS) and whether melatonin treatment can correct abnormal circadian rhythms in SMS patients. In addition, the study investigates the effects of bright light in an elderly control population that exhibits low melatonin secretion.
This study will examine the effect of bright light or melatonin treatment on sleep in children with Smith-Magenis syndrome (SMS), a genetic disorder characterized by certain physical, behavioral and developmental features. Patients have a disrupted sleep cycle involving early waking, frequent daytime napping and frequent nighttime awakenings. Melatonin is a hormone normally produced at night in healthy people. People with SMS produce high levels of melatonin during the daytime and very low levels at night. This may affect their behavior, mood, attention span and sleep patterns. Healthy volunteers between 18 and 45 years of age and children with SMS who are between 3 and 16 years of age may be eligible for this study. Healthy subjects are admitted to the NIH Clinical Center overnight. In the morning they take one dose of time-release melatonin and have blood and saliva samples collected hourly from 7:00 AM to 6:00 PM. Children with SMS participate in a 2-part study, as follows: Part 1 Inpatient Trial Pre-trial at-home phase: During the month before NIH inpatient admission, participants do the following: - Wear an actiwatch device or keep a daily sleep diary to monitor daytime alertness, mood shifts and sleep patterns. - Complete a behavior assessment survey related to the child s behaviors and sleep patterns. - Obtain frequent body temperature measurements. - Collect several saliva samples over a 24-hour period. NIH admission phase: - Children are admitted to the NIH Clinical Center for 2-3 nights for bright light treatment. They remain in their rooms for alternating periods of exposure to standard dim room light and bright light, using a light box placed within 3 to 5 feet of the child. An electroencephalogram (EEG) with additional electrodes to track eye movements is used to monitor the child s attention. Between 8AM and 6PM serial blood samples are collected to measure melatonin levels. A parent rates the child s mood and behavior during the 2-day test period. - Children are admitted to the NIH Clinical Center for 2-3 nights for melatonin treatment. They take a single dose of melatonin or placebo tablet at bedtime. During the daytime, EEG electrodes are placed to track eye movements. Between 7 PM and 7 AM serial blood samples are collected to measure melatonin levels. A parent rates the child s behavior and mood as described for the bright light study. - Children may receive either or both of the bright light and melatonin treatments. Part 2 Outpatient Trial Children participate in a combined bright light with melatonin trial at home. They undergo the same procedures outlined in the pre-trial at-home phase of Part 1 (actiwatch, behavior assessments, body temperature measurements, saliva samples) over an 11-week period. If saliva samples cannot be collected for melatonin testing, 24-hour urine samples may be collected instead.