Cited by 14Genomics and Rare DiseasesGenetics and Neurodevelopmental DisordersGenetic and rare skin diseases.

TFE3‐associated neurodevelopmental disorder: A distinct recognizable syndrome

Diaz, Jullianne, Berger, Seth, Leon, Eyby·2020·American Journal of Medical Genetics Part A

Abstract

The transcription factor for immunoglobulin heavy‐chain enhancer 3 (TFE3) gene encodes a transcription factor that regulates embryonic stem cell (ESC) differentiation. Its phosphorylation by the lysosomal Rag GTPase signaling pathway leads to cytoplasmic sequestration and inactivation promoting ESC differentiation and exit from pluripotency. Somatic translocations of this X‐linked gene cause papillary renal cell carcinoma in which nuclear accumulation of the TFE3 oncoprotein is one of the most significant histopathologic characteristics. Early this year, Villegas et al. identified missense mutations in a TFE3 domain required for cytoplasmic inactivation as potentially causal for a mosaic human developmental disorder. They published five patients with de novo TFE3 nonsynonymous missense variants, four females and one male, with severe intellectual disability (5/5), coarse facial features (4/5), and Blaschkoid pigmentary mosaicism (4/5). The only male described has somatic mosaicism. All patients had normal brain Magnetic Resonance Imagings (MRIs). We present two unrelated females with this distinctive phenotype including the above triad along with other features not previously well described. Both were found to have de novo heterozygous variants in TFE3 on whole exome sequencing, one nonsynonymous missense, and one canonical splice site variant, thereby expanding the phenotypic and mutational spectrum for this disorder. Interestingly, due to significant coarsening of the facial features, both patients were initially thought to have a lysosomal storage disorder but enzyme screening and brain MRIs were negative.

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Crossref · 10.1002/ajmg.a.61437

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Authors
Diaz, J., Berger, S., & Leon, E.
Affiliations
Children's National (US)
Corresponding author
Leon, Eyby
Venue
American Journal of Medical Genetics Part A
Publisher
Wiley
Published
2019-12-12
Volume
182
Issue
3
Pages
584-590
ISSN
  • 1552-4825 (ISSN-L)
  • 1552-4833
OpenAlex
W2994926002
Cited by
14
References
8
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 2 · 2022: 3 · 2021: 2 · 2020: 2 · 2019: 1
FWCI
1.20
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Medical Genetics Part A (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and rare skin diseases.
Keywords
TFE3, neurodevelopmental disorders, missense mutations, splice site mutation, intellectual disability, coarse facial features, somatic mosaicism, transcription factors, phenotypic spectrum, de novo mutations
MeSH terms
Exome Sequencing, Child, Female, Humans, Male, Intellectual Disability, Phenotype, Lysosomal Storage Diseases, Basic Helix-Loop-Helix Leucine Zipper Transcription Factors, Neurodevelopmental Disorders

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