Chapter 1. Gene regulatory networks in neural crest development and evolution

Area of Science:

• Developmental biology
• Evolutionary biology
• Comparative genomics

Background:

• The neural crest is a defining feature of vertebrates, crucial for development.
• Its evolutionary origins and diversification remain areas of active research.
• Understanding neural crest evolution provides insights into vertebrate origins.

Purpose of the Study:

• To review current knowledge on the evolutionary origin of the neural crest.
• To highlight recent findings from various vertebrate model organisms.
• To discuss the diversification of neural crest cells across species.

Main Methods:

• Comparative analysis of developmental studies.
• Review of genomic and transcriptomic data.
• Examination of neural crest markers in diverse species.

Main Results:

• Evidence suggests the neural crest is present in all vertebrates but absent in basal chordates.
• Recent studies in amphioxus, ascidians, and lamprey shed light on early evolution.
• Diversification of neural crest populations is observed in various vertebrate lineages.

Conclusions:

• The neural crest likely emerged early in vertebrate evolution.
• Ongoing research in non-traditional models is crucial for understanding its diversification.
• Comparative studies continue to refine our understanding of neural crest evolution.