ITSN1: a novel candidate gene involved in autosomal dominant neurodevelopmental disorder spectrum.
Fiche publication
Date publication
octobre 2021
Journal
European journal of human genetics : EJHG
Auteurs
Membres identifiés du Cancéropôle Est :
Pr FAIVRE Laurence, Pr PHILIPPE Christophe
Tous les auteurs :
Bruel AL, Vitobello A, Thiffault I, Manwaring L, Willing M, Agrawal PB, Bayat A, Kitzler TM, Brownstein CA, Genetti CA, Gonzalez-Heydrich J, Jayakar P, Zyskind JW, Zhu Z, Vachet C, Wilson GR, Pruniski B, Goyette AM, Duffourd Y, Thauvin-Robinet C, Philippe C, Faivre L
Lien Pubmed
Résumé
ITSN1 plays an important role in brain development. Recent studies in large cohorts of subjects with neurodevelopmental disorders have identified de novo variants in ITSN1 gene thereby suggesting that this gene is involved in the development of such disorders. The aim of this study is to provide further proof of such a link. We performed trio exome sequencing in a patient presenting autism, intellectual disability, and severe behavioral difficulties. Additional affected patients with a neurodevelopmental disorder harboring a heterozygous variant in ITSN1 (NM_003024.2) were collected through a worldwide collaboration. All patients underwent detailed phenotypic and genetic assessment and data was collected and shared by healthcare givers. We identified ten novel patients from eight families with heterozygous truncating or missense variants in ITSN1 gene. In addition, four previously published patients from large meta-analysis studies were included. In total, 7/14 patients presented a de novo variant in ITSN1. All patients showed neurodevelopmental disorders from autism spectrum disorders (90%), intellectual disability (86%), and epilepsy (30%). We demonstrated that truncating variants are in the first half of ITSN1 whereas missense variants are clustered in C-terminal region. We suggest ITSN1 gene is involved in development of an autism spectrum disorder with variable additional neurodevelopmental deficiency, thus confirming the hypothesis that ITSN1 is important for brain development.
Référence
Eur J Hum Genet. 2021 Oct 28;: