Regulation of cell adhesions and motility during initiation of neural crest migration
Matthew R Clay1, Mary C Halloran
1Department of Zoology, 1117 W. Johnson Street, Madison, WI 53706, USA.
Abstract:
Accurate neural crest cell (NCC) migration requires tight control of cell adhesions, cytoskeletal dynamics and cell motility. Cadherins and RhoGTPases are critical molecular players that regulate adhesions and motility during initial delamination of NCCs from the neuroepithelium. Recent studies have revealed multiple functions for these molecules and suggest that a precise balance of their activity is crucial. RhoGTPase appears to regulate both cell adhesions and protrusive forces during NCC delamination. Increasing evidence shows that cadherins are multi-functional proteins with novel, adhesion-independent signaling functions that control NCC motility during both delamination and migration. These functions are often regulated by specific proteolytic cleavage of cadherins. After NCC delamination, planar cell polarity signaling acts via RhoGTPases to control NCC protrusions and migration direction.
Insights
Neural crest cell (NCC) migration depends on cadherins and RhoGTPases for proper cell adhesion and motility. Precise regulation of these molecules is essential for NCC delamination and directed migration.
Area of Science:
- Developmental Biology
- Cell Biology
- Molecular Biology
Background:
- Accurate neural crest cell (NCC) migration is vital for development.
- Cadherins and RhoGTPases are key regulators of cell adhesion and motility.
- Their precise balance is crucial for NCC delamination and migration.
Purpose of the Study:
- To investigate the roles of cadherins and RhoGTPases in NCC delamination and migration.
- To explore the adhesion-dependent and independent functions of cadherins.
- To understand how planar cell polarity signaling influences NCC migration direction.
Main Methods:
- Analysis of molecular mechanisms controlling cell adhesion.
- Investigation of cytoskeletal dynamics during NCC delamination.
- Study of signaling pathways regulating cell motility.
Main Results:
- RhoGTPases regulate both cell adhesions and protrusive forces during NCC delamination.
- Cadherins exhibit adhesion-independent signaling functions controlling NCC motility.
- Proteolytic cleavage of cadherins regulates their signaling functions.
- Planar cell polarity signaling, via RhoGTPases, directs NCC migration post-delamination.
Conclusions:
- Cadherins and RhoGTPases are critical for NCC delamination and migration.
- Adhesion-independent cadherin functions and RhoGTPase signaling are essential for NCC motility.
- Precise regulation of these molecular players ensures correct NCC development.
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