INTU-related oral-facial-digital syndrome type VI: A confirmatory report.

Fiche publication


Date publication

juin 2018

Journal

Clinical genetics

Auteurs

Membres identifiés du Cancéropôle Est :
Pr FAIVRE Laurence


Tous les auteurs :
Bruel AL, Levy J, Elenga N, Defo A, Favre A, Lucron H, Capri Y, Perrin L, Passemard S, Vial Y, Tabet AC, Faivre L, Thauvin-Robinet C, Verloes A

Résumé

Oral-facial-digital (OFD) syndromes are a subgroup of ciliopathies distinguished by the co-occurrence of hamartomas and/or multiple frenula of the oral region and digital anomalies. Several clinical forms of OFD syndromes are distinguished by their associated anomalies and/or inheritance patterns, and at least 20 genetic types of OFD syndromes have been delineated. We describe here a child with preaxial and postaxial polydactyly, lingual hamartoma, a congenital heart defect, delayed development and cerebellar peduncles displaying the molar tooth sign. Whole-exome sequencing and SNP array identified compound heterozygous variants in the INTU gene, which encodes a protein involved in the positioning of the ciliary basal body. INTU is a subunit of the CPLANE multiprotein complex essential for the assembly of IFT-A particles and intraflagellar transport. This report of a second patient with INTU-related OFD syndrome and the further delineation of its neuroimaging and skeletal phenotype now allow INTU-related OFD syndromes to be classified within the OFD syndrome type VI group. Patients display a phenotype similar to that of mice with a hypomorphic mutation of Intu, but with the addition of a heart defect.

Mots clés

CPLANE, INTU, NGS, oral-facial-digital syndrome

Référence

Clin. Genet.. 2018 Jun;93(6):1205-1209