Understanding Human Cortical Expansion Using Pluripotent Stem Cell-Derived Brain Organoids: Insights Into Progenitor...

Area of Science:

• Neuroscience
• Evolutionary Biology
• Developmental Biology

Background:

• The human brain's evolution, particularly the cerebral cortex, is key to higher cognitive functions.
• Expansion of the cerebral cortex is linked to neural precursor proliferation and differentiation.
• Understanding human brain evolution is crucial for insights into neurodevelopmental diseases.

Purpose of the Study:

• To review how brain organoids model interspecies differences in cortical development.
• To discuss recapitulation of neural precursor expansion, neurogenesis, and gliogenesis.
• To explore improvements for brain organoid models to study human brain evolution.

Main Methods:

• Comparative genomic studies using pluripotent stem cells and brain organoids.
• Analysis of human-specific genes and pathways in neurodevelopment.
• Evaluating brain organoids' ability to preserve in vivo cytoarchitecture and developmental trajectories.

Main Results:

• Brain organoids can recapitulate species-specific differences in cortical development.
• Models show varying neural precursor expansion, neurogenesis, and gliogenesis across species.
• Human-specific genes and pathways identified during neurodevelopment.

Conclusions:

• Brain organoids are valuable tools for studying human brain evolution and cortical development.
• Improvements in organoid technology can deepen our understanding of cross-species brain differences.
• Research into brain expansion mechanisms may illuminate neurodevelopmental disorders.