Cited by 1,452Genetic Syndromes and ImprintingGenomic variations and chromosomal abnormalitiesWilliams Syndrome Research

Prader-Willi syndrome

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Cassidy, Suzanne B., Schwartz, Stuart, Miller, Jennifer L., Driscoll, Daniel J.·2012·Genetics in Medicine

Abstract

Prader-Willi syndrome is characterized by severe infantile hypotonia with poor suck and failure to thrive; hypogonadism causing genital hypoplasia and pubertal insufficiency; characteristic facial features; early-childhood onset obesity and hyperphagia; developmental delay/mild intellectual disability; short stature; and a distinctive behavioral phenotype. Sleep abnormalities and scoliosis are common. Growth hormone insufficiency is frequent, and replacement therapy provides improvement in growth, body composition, and physical attributes. Management is otherwise largely supportive. Consensus clinical diagnostic criteria exist, but diagnosis should be confirmed through genetic testing. Prader-Willi syndrome is due to absence of paternally expressed imprinted genes at 15q11.2-q13 through paternal deletion of this region (65-75% of individuals), maternal uniparental disomy 15 (20-30%), or an imprinting defect (1-3%). Parent-specific DNA methylation analysis will detect >99% of individuals. However, additional genetic studies are necessary to identify the molecular class. There are multiple imprinted genes in this region, the loss of which contribute to the complete phenotype of Prader-Willi syndrome. However, absence of a small nucleolar organizing RNA gene, SNORD116, seems to reproduce many of the clinical features. Sibling recurrence risk is typically <1%, but higher risks may pertain in certain cases. Prenatal diagnosis is available.

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  • Paternal-specific deletion of multiple imprinted, paternally expressed genes on the 15q11-q13 region results in Prader-Willi syndrome.

    “Similarly, paternal-specific deletion of multiple imprinted, paternally expressed genes on the 15q11–q13 region results in Prader–Willi syndrome, whereas maternal deletion of a single, imprinted, maternally expressed gene encoding a ubiquitin-protein ligase (UBE3A) on this same region gives rise to the Angelman syndrome phenotype.”

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Research works printed but not linked: 13

  1. [19]19. Dykens, E.M. ∙ Cassidy, S.B. ∙ King, B.H. Maladaptive behavior differences in Prader-Willi syndrome due to paternal deletion versus maternal uniparental disomy 1:STN:280:DyaK1M7jslWhsg%3D%3D https://pubmed.ncbi.nlm.nih.gov/9972835/ Am J Ment Retard. 1999; 104:67-77 Google Scholar
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  8. [137]137. Kubota, T. ∙ Das, S. ∙ Christian, S.L. ... Methylation-specific PCR simplifies imprinting analysis 1:CAS:528:DyaK2sXivFKhsLo%3D https://pubmed.ncbi.nlm.nih.gov/9140389/ Nat Genet. 1997; 16:16-17 Google Scholar
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  10. [155]155. Butler, M.G. ∙ Hedges, L.K. ∙ Rogan, P.K. ... Klinefelter and trisomy X syndromes in patients with Prader-Willi syndrome and uniparental maternal disomy of chromosome 15–a coincidence 1:STN:280:DyaK2svjvFGgsg%3D%3D https://pubmed.ncbi.nlm.nih.gov/9295086/ https://pubmed.ncbi.nlm.nih.gov/6025896/ Am J Med Genet. 1997; 72:111-114 Google Scholar
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Authors
Cassidy, S. B., Schwartz, S., Miller, J. L., & Driscoll, D. J.
Affiliations
  • University of California, San Francisco (US)
  • University of Florida Health (US)
  • University of Florida (US)
Corresponding author
Cassidy, Suzanne B.
Venue
Genetics in Medicine
Publisher
Elsevier BV
Published
2012-01
Volume
14
Issue
1
Pages
10-26
ISSN
1098-3600 (ISSN-L)
OpenAlex
W1980782305
Cited by
1,452
References
164
Citations by year
2026: 61 · 2025: 86 · 2024: 119 · 2023: 112 · 2022: 121 · 2021: 111 · 2020: 119 · 2019: 112 · 2018: 105 · 2017: 95 · 2016: 102 · 2015: 80 · 2014: 90 · 2013: 72 · 2012: 37
FWCI
10.95
Type
journal article
Language
en
Open access
Locations
  • Genetics in Medicine (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Syndromes and Imprinting
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Neuroscience › Developmental Neuroscience › Williams Syndrome Research
Keywords
Prader-Willi syndrome, genomic imprinting, paternal deletion, uniparental disomy 15, imprinting defects, SNORD116, growth hormone deficiency, growth hormone replacement therapy, hypogonadism, childhood obesity, hyperphagia, intellectual disability, sleep abnormalities, scoliosis, prenatal diagnosis, recurrence risk, genetic testing
MeSH terms
Diagnosis, Differential, Genetic Counseling, Genetic Testing, Humans, Morbidity, Prader-Willi Syndrome, Genetic Association Studies

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