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

Ilaria Parenti, María E. Teresa-Rodrigo, Jelena Pozojevic, Sara Ruiz Gil, Ingrid Bader, Diana Braunholz, Nuria C. Bramswig, Cristina Gervasini, Lidia Larizza, Lutz Pfeiffer, Ferda Ozkinay, Feliciano Ramos, Benedikt Reiz, Olaf Rittinger, Tim M. Strom, Erwan Watrin, Kerstin Wendt, Dagmar Wieczorek, Bernd Wollnik, Carolina Baquero-MontoyaJuan Pié, Matthew A. Deardorff, Gabriele Gillessen-Kaesbach, Frank J. Kaiser

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)307-320
Number of pages14
JournalHuman Genetics
Volume136
Issue number3
DOIs
Publication statusPublished - Mar 1 2017

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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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., Ozkinay, F., Ramos, F., Reiz, B., Rittinger, O., Strom, T. M., Watrin, E., Wendt, K., Wieczorek, D., Wollnik, B., ... Kaiser, F. J. (2017). Mutations in chromatin regulators functionally link Cornelia de Lange syndrome and clinically overlapping phenotypes. Human Genetics, 136(3), 307-320. https://doi.org/10.1007/s00439-017-1758-y