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Management of Sleep Disturbances Associated with Smith-Magenis Syndrome

Abstract

Smith-Magenis syndrome is a genetic disorder caused by a microdeletion involving the retinoic acid-induced 1 (RAI1) gene that maps on the short arm of chromosome 17p11.2 or a pathogenic mutation of RAI1. Smith-Magenis syndrome affects patients through numerous congenital anomalies, intellectual disabilities, behavioral challenges, and sleep disturbances. The sleep abnormalities associated with Smith-Magenis syndrome can include frequent nocturnal arousals, early morning awakenings, and sleep attacks during the day. The sleep problems associated with Smith-Magenis syndrome are attributed to haploinsufficiency of the RAI1 gene. One consequence of reduced function of RAI1, and characteristic of Smith-Magenis syndrome, is an inversion of melatonin secretion resulting in a diurnal rather than nocturnal pattern. Treatment of sleep problems in people with Smith-Magenis syndrome generally involves a combination of sleep hygiene techniques, supplemental melatonin, and/or other medications, such as melatonin receptor agonists, β1-adrenergic antagonists, and stimulant medications, to improve sleep outcomes. Improvement in sleep has been shown to improve behavioral outcomes, which in turn improves the quality of life for both patients and their caregivers.

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Correspondence to Kevin A. Kaplan.

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No funding sources were used for the preparation of this article.

Conflict of interest

Sarah H. Elsea receives research funding from the Smith-Magenis Syndrome Research Foundation, PRISMS, Inc., Fondation Jerome Lejeune, Rhythm Therapeutics, and Vanda Pharmaceuticals. Kevin A. Kaplan and Lorraine Potocki have no conflicts of interest that are directly relevant to the content of this article.

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Kaplan, K.A., Elsea, S.H. & Potocki, L. Management of Sleep Disturbances Associated with Smith-Magenis Syndrome. CNS Drugs 34, 723–730 (2020). https://doi.org/10.1007/s40263-020-00733-5

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