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POU3F3-related disorder: Defining the phenotype and expanding the molecular spectrum

  • Alessandra Rossi*
  • , Lot Snijders Blok
  • , Sonja Neuser
  • , Chiara Klöckner
  • , Konrad Platzer
  • , Laurence Olivier Faivre
  • , Heike Weigand
  • , Maria L Dentici
  • , Marco Tartaglia
  • , Marcello Niceta
  • , Paolo Alfieri
  • , Siddharth Srivastava
  • , David Coulter
  • , Lacey Smith
  • , Kristin Vinorum
  • , Gerarda Cappuccio
  • , Nicola Brunetti-Pierri
  • , Deniz Torun
  • , Mutluay Arslan
  • , Mathilde F Lauridsen
  • Oliver Murch, Rachel Irving, Sally A Lynch, Sarju G Mehta, Jenny Carmichael, Evelien Zonneveld-Huijssoon, Bert de Vries, Tjitske Kleefstra, Katrine M Johannesen, Ian T Westphall, Susan S Hughes, Sarah Smithson, Julie Evans, Tracy Dudding-Byth, Marleen Simon, Ellen van Binsbergen, Johanna C Herkert, Gea Beunders, Henry Oppermann, Mert Bakal, Rikke S Møller, Guido Rubboli, Allan Bayat*
*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

Abstract

POU3F3 variants cause developmental delay, behavioral problems, hypotonia and dysmorphic features. We investigated the phenotypic and genetic landscape, and genotype-phenotype correlations in individuals with POU3F3-related disorders. We recruited unpublished individuals with POU3F3 variants through international collaborations and obtained updated clinical data on previously published individuals. Trio exome sequencing or single exome sequencing followed by segregation analysis were performed in the novel cohort. Functional effects of missense variants were investigated with 3D protein modeling. We included 28 individuals (5 previously published) from 26 families carrying POU3F3 variants; 23 de novo and one inherited from an affected parent. Median age at study inclusion was 7.4 years. All had developmental delay mainly affecting speech, behavioral difficulties, psychiatric comorbidities and dysmorphisms. Additional features included gastrointestinal comorbidities, hearing loss, ophthalmological anomalies, epilepsy, sleep disturbances and joint hypermobility. Autism, hearing and eye comorbidities, dysmorphisms were more common in individuals with truncating variants, whereas epilepsy was only associated with missense variants. In silico structural modeling predicted that all (likely) pathogenic variants destabilize the DNA-binding region of POU3F3. Our study refined the phenotypic and genetic landscape of POU3F3-related disorders, it reports the functional properties of the identified pathogenic variants, and delineates some genotype-phenotype correlations.

Original languageEnglish
Pages (from-to)186-197
Number of pages12
JournalClinical Genetics
Volume104
Issue number2
Early online date10 May 2023
DOIs
Publication statusPublished - Aug 2023

Funding

The authors would like to thank the families for their participation. This study makes use of data generated by the DECIPHER community. A full list of centers who contributed to the generation of the data is available from and via email from [email protected]. Funding for the DECIPHER project was provided by Wellcome. This study was also, in part, generated within the European Reference Network ITHACA (NBP). This work was in part supported by the Telethon Foundation, Telethon Undiagnosed Diseases Program (TUDP, GSP15001 to Nicola Brunetti-Pierri). Siddharth Srivastava is funded by NIH-NINDS (K23NS119666). Allan Bayat is funded by a BRIDGE-Translational Excellence Program grant funded by the Novo Nordisk Foundation, grant agreement number: NNF20SA0064340.

FundersFunder number
Wellcome Trust
Fondazione Telethon
National Institutes of HealthK23NS119666
Novo Nordisk FoundationNNF20SA0064340

    Keywords

    • Autistic Disorder/genetics
    • Child
    • Developmental Disabilities/genetics
    • Epilepsy/genetics
    • Humans
    • Intellectual Disability/genetics
    • Mutation, Missense/genetics
    • POU Domain Factors/genetics
    • Phenotype
    • Cupped ears
    • Epilepsy
    • Neurodevelopmental disorder
    • Autism

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