Accelerating Cell Migration along Radially Aligned Nanofibers through the Addition of Electrosprayed Nanoparticles in...

Area of Science:

• Biomaterials Engineering
• Tissue Engineering
• Cell Biology

Background:

• Scaffolds guiding cell migration are vital for tissue regeneration.
• Controlling cell movement direction is a key challenge in regenerative medicine.

Purpose of the Study:

• To develop a method for fabricating scaffolds that promote radial cell migration towards the center.
• To investigate the synergistic effects of topographic and haptotactic cues on cell migration.

Main Methods:

• Fabrication of scaffolds using masked electrospray to deposit collagen nanoparticles on radially-aligned nanofibers.
• Creation of a radial density gradient of nanoparticles by adjusting aperture size during electrospray.
• Evaluation of fibroblast migration on scaffolds with and without aligned nanofibers.

Main Results:

• A radial density gradient of collagen nanoparticles was successfully created, promoting peripheral-to-central fibroblast migration.
• Radially-aligned nanofibers enhanced cell migration synergistically with the nanoparticle gradient.
• The combination of aligned nanofibers (topographic cue) and graded nanoparticles (haptotactic cue) significantly accelerated directed cell migration.

Conclusions:

• Masked electrospray offers a versatile method for fabricating scaffolds with controlled cell migration properties.
• Synergistic topographic and haptotactic cues can effectively maximize directed cell migration for tissue regeneration applications.
• This approach holds promise for advancing tissue engineering strategies by optimizing cell homing and integration.