Neuronal fate acquisition and specification: time for a change

Area of Science:

• Developmental biology
• Neuroscience
• Genetics

Background:

• Neural stem/progenitor cells (NSPCs) produce diverse cell types during embryonic development.
• Cell fate determination involves a complex interplay of intrinsic and extrinsic cues.
• Understanding temporal dynamics in neurogenesis is crucial for comprehending brain development and evolution.

Purpose of the Study:

• To explore the interplay between intrinsic and extrinsic cues in cortical neurogenesis.
• To investigate how temporal dynamics influence neuronal diversity.
• To compare conserved and species-specific mechanisms in human and mouse corticogenesis.

Main Methods:

• Analysis of recent data from mouse and human cortical neurogenesis studies.
• Examination of irreversible cell fate transitions in neural stem cells.
• Assessment of gradual temporal changes in cellular competence.

Main Results:

• Temporal changes in neurogenesis result from a dynamic balance of intracellular states and extracellular signaling.
• Both irreversible cell fate transitions and gradual competence changes contribute to neuronal diversity.
• Mechanisms are largely conserved across species, with notable unique features in human corticogenesis.

Conclusions:

• The temporal progression of neurogenesis is regulated by a dynamic interplay of cellular signals.
• Human corticogenesis exhibits unique temporal features linked to brain evolution.
• Studying these temporal dynamics provides insights into species-specific brain development.