Cited by 75Genomic variations and chromosomal abnormalitiesGenetics and Neurodevelopmental DisordersWilliams Syndrome Research

New developments in Smith-Magenis syndrome (del 17p11.2)

Gropman, Andrea L, Elsea, Sarah, Duncan, Wallace C, Smith, Ann CM·2007·Current Opinion in Neurology

Abstract

PURPOSE OF REVIEW: Recent clinical, neuroimaging, sleep, and molecular cytogenetic studies have provided new insights into the mechanisms leading to the Smith-Magenis phenotype and are summarized in this review. RECENT FINDINGS: Cross sectional studies of patients with Smith-Magenis syndrome have found evidence for central and peripheral nervous system abnormalities, neurobehavioral disturbances, and an inverted pattern of melatonin secretion leading to circadian rhythm disturbance. A common chromosome 17p11.2 deletion interval spanning approximately 3.5 Mb is identified in about 70% of individuals with chromosome deletion. Recently heterozygous point mutations in the RAI1 gene within the Smith-Magenis syndrome critical region have been reported in Smith-Magenis syndrome patients without detectable deletion by fluorescent in-situ hybridization. Patients with intragenic mutations in RAI1 as well as those with deletions share most but not all aspects of the phenotype. SUMMARY: Findings from molecular cytogenetic analysis suggest that other genes or genetic background may play a role in altering the functional availability of RAI1 for downstream effects. Further research into additional genes in the Smith-Magenis syndrome critical region will help define the role they play in modifying features or severity of the Smith-Magenis syndrome phenotype. More research is needed to translate advances in clinical research into new treatment options to address the sleep and neurobehavioral problems in this disorder.

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Crossref · 10.1097/wco.0b013e3280895dba

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  • Symptoms of SMS include sleep and circadian abnormalities, with the most extreme being a complete reversal of sleep-wake patterns.

    “Symptoms of SMS also include sleep and circadian abnormalities, with the most extreme being a complete reversal of sleep–wake patterns (that is, daytime sleep and night-time wake)128–131.”

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Authors
Gropman, A. L., Elsea, S., Duncan, W. C., & Smith, A. C.
Affiliations
  • National Institutes of Health (US)
  • Virginia Commonwealth University (US)
Corresponding author
Gropman, Andrea L
Venue
Current Opinion in Neurology
Published
2007-04
Volume
20
Issue
2
Pages
125-134
ISSN
1350-7540 (ISSN-L)
OpenAlex
W1983800263
Cited by
75
References
63
Citations by year
2026: 2 · 2024: 2 · 2022: 1 · 2021: 2 · 2020: 7 · 2019: 2 · 2018: 3 · 2017: 1 · 2016: 2 · 2015: 7 · 2014: 3 · 2013: 4 · 2012: 4
FWCI
0.94
Type
journal article
Language
en
Open access
closed
Locations
  • Current Opinion in Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Developmental Neuroscience › Williams Syndrome Research
Keywords
Smith-Magenis syndrome, chromosome 17p11.2 deletion, RAI1 gene, neurobehavioral disorders, circadian rhythm disruption, melatonin secretion, sleep disorders, neuroimaging abnormalities, genotype-phenotype correlation
MeSH terms
Abnormalities, Multiple, Chromosomes, Human, Pair 17, Humans, Intellectual Disability, Mutation, Transcription Factors, Trans-Activators

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