Phenotypic expansion and variable expressivity in individuals with JARID2-related intellectual disability: A case series.

Creator(s)

Maxime Cadieux-Dion, Children's Mercy Kansas City
Emily G. Farrow, Children's Mercy HospitalFollow
Isabelle Thiffault, Children's Mercy HospitalFollow
Ana S A Cohen, Children's Mercy HospitalFollow
Holly Welsh, Children's Mercy HospitalFollow
Lauren E. Bartik, Children's Mercy HospitalFollow
Caitlin Schwager, Children's Mercy Kansas CityFollow
Kendra Engleman, Children's Mercy HospitalFollow
Dihong Zhou, Children's Mercy HospitalFollow
Lei Zhang, Children's Mercy HospitalFollow
Elena Repnikova, Children's Mercy HospitalFollow
Shivarajan Manickavasagam Amudhavalli, Children's Mercy HospitalFollow
Carol J. Saunders, Children's Mercy HospitalFollow

Document Type

Article

Publication Date

8-2022

Identifier

DOI: 10.1111/cge.14149

Abstract

Loss of function variants in JARID2 were recently reported in 16 patients with a neurodevelopmental disorder characterized by delays, intellectual and learning disability, autism, behavioral abnormalities, and dysmorphic features. Most cases were de novo, with only one variant inherited from an affected parent. Here, we present seven additional individuals from five families with pathogenic or likely pathogenic JARID2 variants, confirming this gene-disease association and highlighting palatal abnormalities and heart defects as part of the phenotype. In addition, we report inheritance of JARID2 variants from mildly affected parents, demonstrating the variable expressivity of the disease. We also note the high prevalence of intragenic JARID2 copy number variants, emphasizing the importance of exon-level analysis.

Journal Title

Clinical genetics

Volume

102

Issue

2

First Page

136

Last Page

141

MeSH Keywords

Autistic Disorder; DNA Copy Number Variations; Exons; Humans; Intellectual Disability; Phenotype; Polycomb Repressive Complex 2

Keywords

JARID2; clinical genetics; intellectual disability; molecular diagnosis

Recommended Citation

Cadieux-Dion M, Farrow E, Thiffault I, et al. Phenotypic expansion and variable expressivity in individuals with JARID2-related intellectual disability: A case series. Clin Genet. 2022;102(2):136-141. doi:10.1111/cge.14149