Customised next-generation sequencing multigene panel to screen a large cohort of individuals with chromatin-related disorder

Maria Piccione, Paolo Prontera, Bartolomeo Augello, Marco Castori, Silvia Maitz, Stefano Castellana, Elisa Adele Colombo, Maria Accadia, Natascia Malerba, Antonio Petracca, Giuseppe Merla, Sabrina Giglio, Gabriella Maria Squeo, Elisabetta Di Fede, Sabrina Giglio, Matteo Russo, Rita Fischetto, Giuseppe Merla, Daniela Melis, Cristina GervasiniMarilena Carmela Di Giacomo, Valentina Massa, Matteo Della Monica, Angelo Selicorni, Donatella Milani, Tommaso Mazza, Bernardo Augello

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Background The regulation of the chromatin state by epigenetic mechanisms plays a central role in gene expression, cell function, and maintenance of cell identity. Hereditary disorders of chromatin regulation are a group of conditions caused by abnormalities of the various components of the epigenetic machinery, namely writers, erasers, readers, and chromatin remodelers. Although neurological dysfunction is almost ubiquitous in these disorders, the constellation of additional features characterizing many of these genes and the emerging clinical overlap among them indicate the existence of a community of syndromes. The introduction of high-throughput next generation sequencing (NGS) methods for testing multiple genes simultaneously is a logical step for the implementation of diagnostics of these disorders. Methods We screened a heterogeneous cohort of 263 index patients by an NGS-targeted panel, containing 68 genes associated with more than 40 OMIM entries affecting chromatin function. Results This strategy allowed us to identify clinically relevant variants in 87 patients (32%), including 30 for which an alternative clinical diagnosis was proposed after sequencing analysis and clinical re-evaluation. Conclusion Our findings indicate that this approach is effective not only in disorders with locus heterogeneity, but also in order to anticipate unexpected misdiagnoses due to clinical overlap among cognate disorders. Finally, this work highlights the utility of a prompt diagnosis in such a clinically and genetically heterogeneous group of disorders that we propose to group under the umbrella term of chromatinopathies.
Original languageEnglish
Pages (from-to)760-768
Number of pages9
JournalJournal of Medical Genetics
Publication statusPublished - 2020

All Science Journal Classification (ASJC) codes

  • Genetics
  • Genetics(clinical)


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