Dépôt numérique

CHD7 regulates craniofacial cartilage development via controlling HTR2B expression

Breuer, Maximillian; Rummler, Maximilian; Singh, Jaskaran; Maher, Sabrina; Zaouter, Charlotte; Jamadagni, Priyanka; Pilon, Nicolas; Willie, Bettina et Patten, Shunmoogum A. ORCID logoORCID: https://orcid.org/0000-0002-2782-3547 (2024). CHD7 regulates craniofacial cartilage development via controlling HTR2B expression Journal of Bone and Mineral Research , vol. ahead . DOI: 10.1093/jbmr/zjae024. (Sous Presse)

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Mutations in the Chromodomain helicase DNA-binding protein 7 - coding gene (CHD7) cause CHARGE syndrome (CS). Although craniofacial and skeletal abnormalities are major features of CS patients, the role of CHD7 in bone and cartilage development remain largely unexplored. Here, using a zebrafish (Danio rerio) CS model, we show that chd7-/- larvae display abnormal craniofacial cartilage development and spinal deformities. The craniofacial and spine defects are accompanied by a marked reduction of bone mineralization. At the molecular level, we show that these phenotypes are associated with significant reduction in the expression levels of osteoblast differentiation markers. Additionally, we detected a marked depletion of collagen 2α1 in the cartilage of craniofacial regions and vertebrae, along with significantly reduced number of chondrocytes. Chondrogenesis defects are at least in part due to downregulation of htr2b, which we found to be also dysregulated in human cells derived from an individual with CHD7 mutation-positive CS. Overall, this study thus unveils an essential role for CHD7 in cartilage and bone development, with potential clinical relevance for the craniofacial defects associated with CS.

Type de document: Article
Mots-clés libres: Diseases and disorders of/related to bone; genetic research; cells of bone
Centre: Centre INRS-Institut Armand Frappier
Date de dépôt: 17 mars 2024 19:25
Dernière modification: 17 mars 2024 19:25
URI: https://espace.inrs.ca/id/eprint/15304

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