CHD7 Mutations and Phenotypic Spectrum in CHARGE Syndrome

CHARGE syndrome is a multisystem congenital condition caused predominantly by mutations in the CHD7 gene, which encodes an ATP-dependent chromatin remodeller essential for tissue-specific gene regulation during embryogenesis. The phenotypic spectrum encompasses ocular coloboma, cardiac malformations, choanal atresia, growth and developmental delay, genital anomalies and ear abnormalities, alongside variable neurodevelopmental features. Clinical heterogeneity arises from the diversity of CHD7 variants—ranging from truncating changes to missense substitutions—and their impact on chromatin accessibility and downstream transcriptional programmes. Emerging data reveal critical roles for CHD7 in craniofacial cartilage formation, inner ear morphogenesis, neural progenitor differentiation and myelination, underpinning the broad anatomical and functional deficits that define the syndrome. Understanding genotype–phenotype correlations and tissue-specific mechanisms has become pivotal for refining diagnostic strategies, prognostic assessments and the development of targeted interventions.

Research from Nature Portfolio

Recent studies have elucidated the requirement for CHD7 in neuronal differentiation within the cerebellum. Genetic inactivation of CHD7 in granule neuron progenitors leads to cerebellar hypoplasia, aberrant Purkinje cell positioning and increased apoptosis, recapitulating features of human CHARGE syndrome. Mechanistically, CHD7 maintains open chromatin at enhancer elements of long neuronal genes, including those governing cytoskeletal organisation and synaptic function. This work highlights a core transcriptional programme controlled by CHD7 and underscores its non-redundant role as a chromatin remodeller in brain development.

CHD7 Mutations and Phenotypic Spectrum in CHARGE Syndrome publication trend

The graph below shows the total number of articles in chd7 mutations and phenotypic spectrum in charge syndrome across all publications each year (not limited to Nature Index journals).

Technical terms

CHARGE syndrome: A congenital disorder characterised by Coloboma, Heart defects, Atresia choanae, Retardation of growth and development, Genital anomalies and Ear abnormalities.

CHD7: The gene encoding chromodomain helicase DNA-binding protein 7, an ATP-dependent chromatin remodeller involved in the regulation of gene expression during development.

Chromatin remodeller: A protein complex that alters the structure of chromatin to regulate the accessibility of DNA for transcription, replication and repair.

Haploinsufficiency: A pathogenic mechanism whereby loss of one functional copy of a gene results in an insufficient dosage of gene product to maintain normal function.

References

1. CHD7 regulates craniofacial cartilage development via controlling HTR2B expression. Journal of Bone and Mineral Research (2024).
2. Deletion of the chd7 Hinders Oligodendrocyte Progenitor Cell Development and Myelination in Zebrafish. International Journal of Molecular Sciences (2023).
3. Diagnosis challenges in CHARGE syndrome: A novel variant and clinical description. Heliyon (2024).
4. CHD7 variants associated with hearing loss and enlargement of the vestibular aqueduct. Human Genetics (2023).
5. Chd7 is indispensable for mammalian brain development through activation of a neuronal differentiation programme. Nature Communications (2017).