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<dc:title xml:lang="fr">Rôle développemental du gène à effet de dose CHD1L et son implication dans les syndromes de microdélétion et de microduplication 1q21.1 chez l’Homme</dc:title>
<dcterms:alternative xml:lang="en">Developmental role of the dosage-sensitive gene CHD1L and its implications in 1q21.1 syndromes</dcterms:alternative>
<dc:subject xml:lang="fr">Syndromes 1q21.1</dc:subject>
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<dc:subject xml:lang="fr">CHD1L</dc:subject>
<dc:subject xml:lang="fr">Neurodéveloppement</dc:subject>
<dc:subject xml:lang="fr">Épigénétique</dc:subject>
<dc:subject xml:lang="fr">Poisson- zèbre</dc:subject>
<dc:subject xml:lang="fr">HiPSC</dc:subject>
<dc:subject xml:lang="en">1q21.1 syndromes</dc:subject>
<dc:subject xml:lang="en">CNV</dc:subject>
<dc:subject xml:lang="en">CHD1L</dc:subject>
<dc:subject xml:lang="en">Neurodevelopment</dc:subject>
<dc:subject xml:lang="en">Epigenetics</dc:subject>
<dc:subject xml:lang="en">Zebrafish</dc:subject>
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<dcterms:abstract xml:lang="fr">Les variations du nombre de copies (CNV, délétion/duplication) de la région distale 1q21.1 sont responsables de syndromes caractérisés par des variations anthropométriques en miroir et des troubles neurodéveloppementaux (TND). L’implication des gènes présents dans cette région dans les syndromes 1q21.1 est mal comprise. La modulation in vivo de l’expression des gènes de la région 1q21.1 distale a permis d’identifier CHD1L, un remodeleur de la chromatine, comme responsable des phénotypes miroirs observés. L’étude du rôle développemental de CHD1L a révélé son interaction avec des facteurs de transcription et des complexes protéiques majeurs du neurodéveloppement. Ce remodeleur régule l’expression de gènes impliqués dans la neurogenèse et la régulation de la taille corporelle. L’ensemble de nos résultats suggère l’existence d’un trouble associé à CHD1L à expressivité variable et à pénétrance incomplète. Décrypter la génétique des CNV pathogéniques contribue à une meilleure compréhension des TND et permet d’identifier des pistes prometteuses pour améliorer la qualité de vie des patients.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Copy number variations (CNVs, deletions/duplications) affecting the distal 1q21.1 region are responsible for syndromes characterized by mirror anthropometric features and neurodevelopmental disorders (NDD). The contribution of genes within this region to the 1q21.1 syndromes remains poorly understood. In vivo modulation of the 1q21.1 distal gene expression identified CHD1L, a chromatin remodeler, as responsible for the observed mirror phenotypes. Investigation of the developmental role of CHD1L revealed its interaction with key transcription factors and major protein complexes involved in neurodevelopment. This remodeler regulates the expression of genes implicated in neurogenesis, body size regulation, and urogenital system development. Moreover, our findings suggest the existence of a CHD1L-associated disorder with variable expressivity and incomplete penetrance. Deciphering the genetics of pathogenic CNV enhances our understanding of NDD and helps identify promising avenues for improved diagnosis and better patient quality of life.</dcterms:abstract>
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