Chromosome conformation elucidates regulatory relationships in developing human brain

Area of Science:

• Genomics
• Neuroscience
• Developmental Biology

Background:

• The 3D organization of chromosomes dynamically regulates gene expression.
• The role of 3D genome structure in human brain development and neurodevelopmental disorders remains largely unknown.

Purpose of the Study:

• To generate high-resolution 3D chromatin contact maps during human corticogenesis.
• To identify regulatory relationships influencing human cognition and disease, particularly neurodevelopmental disorders.

Main Methods:

• High-resolution 3D chromatin contact mapping during human corticogenesis.
• Integration of chromatin contact data with non-coding variants from schizophrenia genome-wide association studies (GWAS).
• Genome editing in human neural progenitors to validate gene regulation.

Main Results:

• Hundreds of genes interacting with lineage-specific enhancers were identified, many linked to cognitive function.
• Candidate schizophrenia risk genes and pathways, including neurogenesis transcription factors and cholinergic signaling molecules, were highlighted.
• A distal schizophrenia GWAS locus was shown to regulate FOXG1 expression in neural progenitors.

Conclusions:

• This work provides a framework for understanding non-coding regulatory elements in human brain development and cognitive evolution.
• Novel mechanisms underlying neuropsychiatric disorders, such as schizophrenia, have been uncovered.