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Parenti, I.* ; Teresa-Rodrigo, M.E.* ; Pozojevic, J.* ; Ruiz Gil, S.* ; Bader, I.* ; Braunholz, D.* ; Bramswig, N.C.* ; Gervasini, C.* ; Larizza, L.* ; Pfeiffer, L.* ; Ozkınay, F.* ; Ramos, F.* ; Reiz, B.* ; Rittinger, O.* ; Strom, T.M. ; Watrin, E.* ; Wendt, K.* ; Wieczorek, D.* ; Wollnik, B.* ; Baquero-Montoya, C.* ; Pié, J.* ; Deardorff, M.A.* ; Gillessen-Kaesbach, G.* ; Kaiser, F.J.*

Mutations in chromatin regulators functionally link Cornelia de Lange syndrome and clinically overlapping phenotypes.

Hum. Genet. 136, 307-320 (2017)

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Open Access Green as soon as Postprint is submitted to ZB.

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The coordinated tissue-specific regulation of gene expression is essential for the proper development of all organisms. Mutations in multiple transcriptional regulators cause a group of neurodevelopmental disorders termed “transcriptomopathies” that share core phenotypical features including growth retardation, developmental delay, intellectual disability and facial dysmorphism. Cornelia de Lange syndrome (CdLS) belongs to this class of disorders and is caused by mutations in different subunits or regulators of the cohesin complex. Herein, we report on the clinical and molecular characterization of seven patients with features overlapping with CdLS who were found to carry mutations in chromatin regulators previously associated to other neurodevelopmental disorders that are frequently considered in the differential diagnosis of CdLS. The identified mutations affect the methyltransferase-encoding genes KMT2A and SETD5 and different subunits of the SWI/SNF chromatin-remodeling complex. Complementary to this, a patient with Coffin–Siris syndrome was found to carry a missense substitution in NIPBL. Our findings indicate that mutations in a variety of chromatin-associated factors result in overlapping clinical phenotypes, underscoring the genetic heterogeneity that should be considered when assessing the clinical and molecular diagnosis of neurodevelopmental syndromes. It is clear that emerging molecular mechanisms of chromatin dysregulation are central to understanding the pathogenesis of these clinically overlapping genetic disorders.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Cause Intellectual Disability; Coffin-siris Syndrome; Of-function Mutations; Transcriptional Regulation; Genetic-heterogeneity; Molecular Diagnostics; Hdac8 Mutations; Nipped-b; Complex; Cohesin

ISSN (print) / ISBN 0340-6717

e-ISSN 1432-1203

Journal Human Genetics

Quellenangaben Volume: 136, Issue: 3, Pages: 307-320

Publisher Springer

Publishing Place New York

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Human Genetics (IHG)