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Comparative analysis of neural crest cell death, migration, and function during vertebrate embryogenesis
Paul Kulesa1, Debra L Ellies, Paul A Trainor
1Stowers Institute for Medical Research, Kansas City, Missouri, USA.
Summary
Cranial neural crest cells form head structures in vertebrates. Interspecies differences in their patterning, like apoptosis in chicks but not mice, offer insights into jaw evolution.
Area of Science:
- Developmental Biology
- Evolutionary Biology
- Craniofacial Development
Background:
- Cranial neural crest cells are multipotent, migratory cells crucial for vertebrate head development.
- Their proper patterning is essential for craniofacial morphogenesis and is linked to neural tube segmentation.
- Neural crest cell migration involves complex cell-cell and cell-environment interactions.
Purpose of the Study:
- To highlight the evolutionary significance of interspecies differences in cranial neural crest cell patterning.
- To explore how these differences contribute to jaw development and evolution.
Main Methods:
- Review of recent advances in live embryo imaging techniques.
- Comparative analysis of cranial neural crest cell behavior across different vertebrate species.
Main Results:
- Cranial neural crest cell migration is conserved but exhibits mechanistic differences between species.
- Apoptosis plays a role in chick cranial neural crest patterning, unlike in mouse, frog, or fish embryos.
Conclusions:
- Interspecies variations in cranial neural crest cell patterning mechanisms, such as apoptosis, are significant for understanding jaw evolution.
- Comparative studies are vital for elucidating the evolutionary pathways of craniofacial development.