Electrospun Parallel, Crossed Fibers for Promoting Cell Adhesion and Migration

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Electrospun fibers mimic natural extracellular matrices, making them promising for skin tissue engineering scaffolds.
• The topographical features of these fibers significantly influence cell behavior, but their specific impact on human skin fibroblasts (HSFs) is not fully understood.

Purpose of the Study:

• To investigate how parallel and crossed electrospun fiber architectures affect the morphology, proliferation, and migration of human skin fibroblasts (HSFs).
• To elucidate the role of electrospun fiber topography in guiding cellular decision-making within complex microenvironments.

Main Methods:

• Utilized electrospinning technology to create scaffolds with defined parallel and crossed fiber architectures.
• Analyzed human skin fibroblast (HSF) responses, including spreading morphology, proliferation, and migration patterns, on these scaffolds.

Main Results:

• Cells showed spindle-shaped elongation along single fibers.
• A fiber spacing of 30-60 μm was identified as a threshold for distinct cell behaviors on parallel fibers, promoting cross-adhesions.
• At fiber intersections (100 μm spacing), three cellular responses (anchoring, turning, bridging) were observed.
• Cell migration path alteration was linked to lateral extension ability and constrained by cell body dimensions.

Conclusions:

• Electrospun fiber topography plays a critical role in directing HSF behavior, including morphology and migration.
• Specific fiber spacing and intersection characteristics influence cellular responses and migration path decisions.
• Findings provide insights into topography-triggered cell migration and underscore the importance of material-guided strategies in skin tissue engineering.