MED23 pathogenic variant: genomic-phenotypic analysis

Area of Science:

• Genetics
• Neuroscience
• Molecular Biology

Background:

• The MED23 gene encodes a protein crucial for cellular activities, with known roles in myogenesis.
• Its specific functions in the neurological system and associated clinical phenotypes are not well-defined.

Purpose of the Study:

• To investigate the role of MED23 in neurological disorders.
• To describe the clinical phenotype associated with MED23 mutations.

Main Methods:

• Whole exome sequencing identified a novel MED23 mutation.
• Next-generation sequencing-based copy number variation analysis was performed.
• Clinical, neuroimaging, and electrophysiological data were collected and compared with literature cases.

Main Results:

• MED23 is involved in neurogenesis and brain functions.
• Identified cases primarily exhibited intellectual disability (87.5%) and developmental delay (50%).
• EEG and MRI findings included slow backgrounds, spike-wave complexes, delayed myelination, thin corpus callosum, and pontine hypoplasia.

Conclusions:

• MED23 gene mutations are associated with significant neurological impairments, notably intellectual disability and developmental delay.
• Understanding MED23's regulatory roles offers therapeutic potential.
• Genetic testing is crucial for identifying potential carriers and affected individuals.