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Updated: Jun 13, 2026

Ex utero Electroporation and Whole Hemisphere Explants: A Simple Experimental Method for Studies of Early Cortical Development
Published on: April 3, 2013
Comprehensive multi-omic profiling of somatic mutations in malformations of cortical development
Changuk Chung1,2, Xiaoxu Yang1,2, Taejeong Bae3
1Department of Neurosciences, University of California San Diego, La Jolla, CA, USA.
Researchers identified 69 mutated genes linked to malformations of cortical development (MCD), a neurological condition causing epilepsy. This discovery advances understanding of brain development disorders and their genetic underpinnings.
Area of Science:
- Neuroscience
- Genetics
- Developmental Biology
Background:
- Malformations of cortical development (MCD) are neurological disorders characterized by disrupted brain architecture during embryogenesis.
- These conditions often stem from somatic mosaic mutations and lead to intractable epilepsy.
- Identifying causative genes is difficult due to low mutation levels in resected brain tissue.
Purpose of the Study:
- To identify the genetic landscape of malformations of cortical development.
- To uncover novel mutated genes associated with MCD.
- To correlate specific gene sets with distinct clinical and pathophysiological phenotypes.
Main Methods:
- Intensive profiling of somatic mutations in 283 brain resections.
- Combined whole-exome and targeted-amplicon sequencing.
- Functional validation using in utero electroporation in mice and single-nucleus RNA sequencing.
Main Results:
- Identified 69 mutated genes implicated in malformations of cortical development.
- Established genotype-phenotype correlations, linking specific gene sets to distinct MCD subtypes.
- Revealed spatiotemporal expression patterns of mutated genes in developing and adult brains.
Conclusions:
- The study provides a comprehensive genetic landscape of MCD.
- Mutated genes play critical roles in excitatory neurogenic pools during development.
- These genetic alterations contribute to neuronal hyperexcitability, underlying epilepsy in MCD patients.
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