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Lookup NU author(s): Dr Michael Wright
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© 2019, American College of Medical Genetics and Genomics.Purpose: Sifrim–Hitz–Weiss syndrome (SIHIWES) is a recently described multisystemic neurodevelopmental disorder caused by de novo variants in CHD4. In this study, we investigated the clinical spectrum of the disorder, genotype–phenotype correlations, and the effect of different missense variants on CHD4 function. Methods: We collected clinical and molecular data from 32 individuals with mostly de novo variants in CHD4, identified through next-generation sequencing. We performed adenosine triphosphate (ATP) hydrolysis and nucleosome remodeling assays on variants from five different CHD4 domains. Results: The majority of participants had global developmental delay, mild to moderate intellectual disability, brain anomalies, congenital heart defects, and dysmorphic features. Macrocephaly was a frequent but not universal finding. Additional common abnormalities included hypogonadism in males, skeletal and limb anomalies, hearing impairment, and ophthalmic abnormalities. The majority of variants were nontruncating and affected the SNF2-like region of the protein. We did not identify genotype–phenotype correlations based on the type or location of variants. Alterations in ATP hydrolysis and chromatin remodeling activities were observed in variants from different domains. Conclusion: The CHD4-related syndrome is a multisystemic neurodevelopmental disorder. Missense substitutions in different protein domains alter CHD4 function in a variant-specific manner, but result in a similar phenotype in humans.
Author(s): Weiss K, Lazar HP, Kurolap A, Martinez AF, Paperna T, Cohen L, Smeland MF, Wallen S, Solveig H, Keren B, Terhal P, Irving M, Takaku M, Roberts JD, Petrovich RM, Schrier Vergano SA, Kenney A, Hove H, DeChene E, Quinonez SC, Colin E, Ziegler A, Rumple M, Jain M, Monteil D, Roeder ER, Nugent K, van Haeringen A, Gambello M, Santani A, Medne L, Krock B, Skraban CM, Zackai EH, Dubbs HA, Smol T, Ghoumid J, Parker MJ, Wright M, Turnpenny P, Clayton-Smith J, Metcalfe K, Kurumizaka H, Gelb BD, Baris Feldman H, Campeau PM, Muenke M, Wade PA, Lachlan K
Publication type: Article
Publication status: Published
Journal: Genetics in Medicine
Year: 2020
Volume: 22
Pages: 389–397
Print publication date: 01/02/2020
Online publication date: 07/08/2019
Acceptance date: 09/07/2019
ISSN (print): 1098-3600
ISSN (electronic): 1530-0366
Publisher: Nature Publishing Group
URL: https://doi.org/10.1038/s41436-019-0612-0
DOI: 10.1038/s41436-019-0612-0
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