1. Chromatin assembly factor subunit CHAF1Aas a monogenic cause for oculo-auriculo-vertebral spectrum
- Author
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Pingault, Véronique, Neiva-Vaz, Cécilia, de Oliveira, Judite, Martínez-Gil, Núria, Lasa-Aranzasti, Amaia, Campos, Berta, Lakeman, Inge M. M., Nibbeling, Esther A. R., Stoeva, Radka, Jayakar, Parul, Dabir, Tabib, Elloumi, Houda Zghal, Strong, Alanna, Hanein, Sylvain, Picard, Arnaud, Ochsenbein, Francoise, Blanc, Pierre, and Amiel, Jeanne
- Abstract
Oculo-auriculo-vertebral spectrum (OAVS) is characterized by abnormal development of the 1st and 2nd branchial arches. Despite arguments against a monogenic condition, a few genes have been involved in a minority of cases. We now report heterozygous, presumably loss-of function variants in the CHAF1Agene in 8 individuals, including 3 members of the same family. Four cases fulfill stringent diagnostic criteria for OAVS, including asymmetric ear dysplasia, preauricular tags, mandibular asymmetry +/− vertebral malformations. Two patients also presented with kidney malformations. CHAF1Aencodes a subunit of CAF-1 (chromatin assembly factor-1), a heterotrimeric protein complex responsible for the deposition of newly synthesized histones H3-H4 onto the newly synthetized DNA strand during replication. The identification of loss-of-unction variants in CHAF1Ais consistent with the hypothesis of early developmental genes dysregulation driving OAVS and other associations recently lumped under the acronym Recurrent Constellations of Embryonic Malformations (RCEM).
- Published
- 2025
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