Schwann cells promote endothelial cell migration

Area of Science:

• Biomedical Engineering
• Cell Biology
• Neuroscience

Background:

• Directed cell migration is vital for development, healing, and immunity.
• Substrates provide physical and chemical cues influencing cell movement.
• Neuro-vascular interactions are critical for coordinating nerve and blood vessel development.

Purpose of the Study:

• To investigate the influence of glial cells (rat Schwann cells) on endothelial cell (EC) migration in a 3D co-culture system.
• To elucidate the mechanisms underlying neuro-vascular cross-talk, focusing on EC behavior.
• To assess the role of substrate topography (aligned nanofibers) in this interaction.

Main Methods:

• Electrospinning to create aligned poly(lactic-co-glycolic acid) nanofiber substrates.
• Direct co-culture of human umbilical vein endothelial cells (HUVECs) and rat Schwann cells (rSCs).
• Analysis of EC migration velocity and gene expression profiles.

Main Results:

• Co-culture with rSCs led to increased EC migration velocity compared to ECs cultured alone.
• Gene expression analysis revealed delayed angiogenic factor (interleukin-8, vascular endothelial growth factor) upregulation.
• Upregulation of genes involved in actin filament rearrangement (focal adhesion kinase, MAPKAPK13, Vinculin, Profilin) was observed.

Conclusions:

• Enhanced EC migration in the neuro-vascular co-culture is primarily driven by actin rearrangement pathways.
• Angiogenic factors play a lesser role in the observed increase in EC migration.
• The developed 3D co-culture model effectively demonstrates neuro-vascular interactions, particularly concerning EC migration.