Cell Guiding Multicomponent Nanoyarn Tendon Scaffolds with Tunable Morphology and Flexibility

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Nanofibrous scaffolds are crucial for tendon tissue engineering, mimicking in vivo environments to enhance regeneration.
• Existing scaffolds often lack the complex fibrillar and tubular structures of native tendons.

Purpose of the Study:

• To develop novel multicomponent nanoyarn scaffolds that replicate the native tendon microenvironment.
• To investigate the influence of scaffold morphology on mechanical properties and cell behavior.

Main Methods:

• Co-electrospinning of poly(ε-caprolactone) with a sacrificial polymer to create tunable nanoyarns.
• Bundling nanoyarns and subsequent shell electrospinning to form complex scaffolds.
• Design of experiments and parameter-morphology modeling for scaffold optimization.
• Cyclic bending tests and cell culture studies (mouse and equine tendon cells).

Main Results:

• Successfully fabricated multicomponent nanoyarn scaffolds with controlled porosity, density, and diameter.
• Demonstrated tunable flexibility of scaffolds by adjusting nanoyarn number and porosity.
• Confirmed excellent cytocompatibility and cell-guiding capabilities of the nanoyarn scaffolds.
• Validated parameter-morphology models for precise control over nanoyarn dimensions and orientation.

Conclusions:

• The developed nanoyarn scaffolds offer a promising platform for tendon tissue engineering.
• Scaffold's tunable mechanical properties and cell-guiding ability are critical for mimicking native tendon structure.
• This approach provides a new strategy for fabricating biomimetic scaffolds for musculoskeletal tissue regeneration.