Cranial neural crest migration: new rules for an old road

Area of Science:

• Developmental Biology
• Cell Biology
• Neuroscience

Background:

• Neural crest cells (CNCCs) are crucial for embryonic development, serving as a model for cell migration.
• CNCCs exhibit complex, long-distance migratory patterns to specific targets in the head and branchial arches.
• The molecular mechanisms orchestrating CNCC migration and group coordination remain incompletely understood.

Purpose of the Study:

• To review recent cellular and molecular discoveries regarding the cranial neural crest cell (CNCC) migratory pattern.
• To elucidate the signals that direct CNCC migration through various microenvironments.
• To propose a unifying model for CNCC migratory pattern establishment.

Main Methods:

• Review of existing literature on CNCC cell tracing and molecular signaling.
• Analysis of migratory pathways and patterning of CNCC streams from hindbrain rhombomeres.
• Integration of cranial and trunk neural crest development information.

Main Results:

• CNCCs emerge rostrocaudally from the dorsal neural tube and follow stereotypical migratory routes.
• Discrete migratory streams originate from specific hindbrain rhombomeres (r1-r7).
• Various microenvironments and molecular signals influence CNCC travel and target arrival.

Conclusions:

• Understanding CNCC migration provides insights into fundamental embryonic cell movement.
• A proposed model integrates current knowledge of CNCC migratory pattern formation.
• Further research is needed to fully decipher the molecular orchestration of CNCC migration and coordination.