Tissue topography steers migrating Drosophila border cells.

Area of Science:

• Cell Biology
• Developmental Biology
• Biophysics

Background:

• Cells navigate complex microenvironments by sensing physical and chemical cues.
• The role of tissue topography in guiding cell migration in vivo remains largely unexplored.
• Drosophila border cells provide a model system for studying in vivo cell migration.

Purpose of the Study:

• To investigate how chemical and physical information influences path selection during cell migration in vivo.
• To determine the relative importance of chemoattractants and tissue microtopography in guiding Drosophila border cell migration.
• To elucidate the mechanisms by which cells integrate diverse environmental cues for directed movement.

Main Methods:

• Live imaging of Drosophila border cell migration.
• Genetic manipulation to alter signaling pathways and cellular components.
• Computational modeling and simulations to analyze migration dynamics.
• Analysis of adhesive cues, such as E-cadherin, and their role in haptotaxis.

Main Results:

• Microtopography significantly influences cell migration path selection, acting orthogonally to chemoattractant signals.
• Chemoattractants primarily direct posterior movement, while tissue architecture guides cells towards a path of least resistance.
• E-cadherin acts as a permissive haptotactic cue, facilitating cell movement along topographical features.
• Drosophila border cells integrate topographical, adhesive, and chemoattractant information to make pathfinding decisions.

Conclusions:

• Tissue microtopography is a critical factor in guiding cell migration in vivo, complementing chemical cues.
• Cells actively integrate multiple environmental signals, prioritizing topographical information when available.
• Understanding cue integration is essential for comprehending complex cell migration behaviors in developmental processes and disease states.