An HNRNPK-specific DNA methylation signature makes sense of missense variants and expands the phenotypic spectrum of Au-Kline syndrome.

Au-Kline syndrome (AKS) is a neurodevelopmental disorder associated with multiple malformations and a characteristic facial gestalt. The first individuals ascertained carried de novo loss-of-function (LoF) variants in HNRNPK. Here, we report 32 individuals with AKS (26 previously unpublished), inclu...

Descripción completa

Detalles Bibliográficos
Autores: Choufani S, McNiven V, Cytrynbaum C, Jangjoo M, Adam MP, Bjornsson HT, Harris J, Dyment DA, Graham GE, Nezarati MM, Aul RB, Castiglioni C, Breckpot J, Devriendt K, Stewart H, Banos-Pinero B, Mehta S, Sandford R, Dunn C, Mathevet R, van Maldergem L, Piard J, Brischoux-Boucher E, Vitobello A, Faivre L, Bournez M, Tran-Mau F, Maystadt I, Fernández-Jaén A, Alvarez S, García-Prieto ID, Alkuraya FS, Alsaif HS, Rahbeeni Z, El-Akouri K, Al-Mureikhi M, Spillmann RC, Shashi V, Sanchez-Lara PA, Graham JM Jr, Roberts A, Chorin O, Evrony GD, Kraatari-Tiri M, Dudding-Byth T, Richardson A, Hunt D, Hamilton L, Dyack S, Mendelsohn BA, Rodríguez N, Sánchez-Martínez R, Tenorio-Castaño J, Nevado J, Lapunzina P, Tirado P, Carminho Amaro Rodrigues MT, Quteineh L, Innes AM, Kline AD, Au PYB, Weksberg R
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Instituto de Investigación Biomédica y Sanitaria de Alicante (ISABIAL)
Repositorio:r-ISABIAL. Repositorio Institucional de Producción Científica del Instituto de Investigación Biomédica y Sanitaria de Alicante
OAI Identifier:oai:isabial.fundanetsuite.com:p9247
Acceso en línea:https://isabial.portalinvestigacion.com/publicaciones9247
Access Level:acceso abierto
Palabra clave:Au-Kline syndrome
DNA methylation signature
HNRNPK
Kabuki syndrome
Okamoto syndrome
RNA processing gene
epigenetics
episignature
neurodevelopmental disorder
Descripción
Sumario:Au-Kline syndrome (AKS) is a neurodevelopmental disorder associated with multiple malformations and a characteristic facial gestalt. The first individuals ascertained carried de novo loss-of-function (LoF) variants in HNRNPK. Here, we report 32 individuals with AKS (26 previously unpublished), including 13 with de novo missense variants. We propose new clinical diagnostic criteria for AKS that differentiate it from the clinically overlapping Kabuki syndrome and describe a significant phenotypic expansion to include individuals with missense variants who present with subtle facial features and few or no malformations. Many gene-specific DNA methylation (DNAm) signatures have been identified for neurodevelopmental syndromes. Because HNRNPK has roles in chromatin and epigenetic regulation, we hypothesized that pathogenic variants in HNRNPK may be associated with a specific DNAm signature. Here, we report a unique DNAm signature for AKS due to LoF HNRNPK variants, distinct from controls and Kabuki syndrome. This DNAm signature is also identified in some individuals with de novo HNRNPK missense variants, confirming their pathogenicity and the phenotypic expansion of AKS to include more subtle phenotypes. Furthermore, we report that some individuals with missense variants have an "intermediate" DNAm signature that parallels their milder clinical presentation, suggesting the presence of an epi-genotype phenotype correlation. In summary, the AKS DNAm signature may help elucidate the underlying pathophysiology of AKS. This DNAm signature also effectively supported clinical syndrome delineation and is a valuable aid for variant interpretation in individuals where a clinical diagnosis of AKS is unclear, particularly for mild presentations.

Similares en LA Referencia