Cited by 460Genetics and Neurodevelopmental DisordersGenomic variations and chromosomal abnormalitiesAutism Spectrum Disorder Research

The 22q13.3 Deletion Syndrome (Phelan-McDermid Syndrome)

Open access
Phelan, K., McDermid, H.E.·2011·Molecular Syndromology

Abstract

The 22q13.3 deletion syndrome, also known as Phelan-McDermid syndrome, is a contiguous gene disorder resulting from deletion of the distal long arm of chromosome 22. In addition to normal growth and a constellation of minor dysmorphic features, this syndrome is characterized by neurological deficits which include global developmental delay, moderate to severe intellectual impairment, absent or severely delayed speech, and neonatal hypotonia. In addition, more than 50% of patients show autism or autistic-like behavior, and therefore it can be classified as a syndromic form of autism spectrum disorders (ASD). The differential diagnosis includes Angelman syndrome, velocardiofacial syndrome, fragile X syndrome, and FG syndrome. Over 600 cases of 22q13.3 deletion syndrome have been documented. Most are terminal deletions of ∼100 kb to >9 Mb, resulting from simple deletions, ring chromosomes, and unbalanced translocations. Almost all of these deletions include the gene SHANK3 which encodes a scaffold protein in the postsynaptic densities of excitatory synapses, connecting membrane-bound receptors to the actin cytoskeleton. Two mouse knockout models and cell culture experiments show that SHANK3 is involved in the structure and function of synapses and support the hypothesis that the majority of 22q13.3 deletion syndrome neurological defects are due to haploinsufficiency of SHANK3, although other genes in the region may also play a role in the syndrome. The molecular connection to ASD suggests that potential future treatments may involve modulation of metabotropic glutamate receptors.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1159/000334260

Cites

84 of 84 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 2

  1. Phelan K: 22q13.3 deletion syndrome; in Pagon RA, Bird TD, Dolan CR, Stephens K (eds): GeneTests: GeneReviews [Internet], (Uni- versity of Washington, Seattle, WA 2007). Available at http://www.ncbi.nlm.nih.gov/ books/NBK1198/.
  2. Phelan MC, Stapleton GA, Rogers RC: The Man- agement of Genetic Syndromes (Wiley-Liss, Inc., Hoboken 2010).

Cited by

Sorted by citations

Authors
Phelan, K., & McDermid, H. E.
Affiliations
  • Tulane University (US)
  • University of Alberta (CA)
Venue
Molecular Syndromology
Publisher
S. Karger AG
Published
2011
Volume
2
Issue
3-5
Pages
186-201
ISSN
  • 1661-8769 (ISSN-L)
  • 1661-8777
OpenAlex
W2015053297
Cited by
460
References
84
Citations by year
2026: 23 · 2025: 18 · 2024: 32 · 2023: 52 · 2022: 47 · 2021: 36 · 2020: 41 · 2019: 34 · 2018: 37 · 2017: 31 · 2016: 32 · 2015: 23 · 2014: 22 · 2013: 27 · 2012: 4
FWCI
10.78
Type
journal article
Language
en
Open access
Locations
  • Molecular Syndromology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
Keywords
Phelan-McDermid syndrome, SHANK3, autism spectrum disorder, intellectual disability, developmental delay, speech delay, hypotonia, haploinsufficiency, synaptic dysfunction, metabotropic glutamate receptors, differential diagnosis, Angelman syndrome, 22q11.2 deletion syndrome, fragile X syndrome, FG syndrome, ring chromosomes, unbalanced translocation

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review