Multi-scale hierarchical scaffolds with aligned micro-fibers for promoting cell alignment

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Biotechnology

Background:

• Cell alignment is vital for tissue function in vascular tissues, cardiac muscles, and tendons.
• Existing biomimetic scaffolds struggle to integrate mechanical properties, biomimetic microenvironments, and cell alignment induction.
• Developing advanced scaffolds is crucial for regenerative medicine and understanding cell behavior.

Purpose of the Study:

• To develop an integrated 3D printing system for fabricating multi-scale hierarchical scaffolds.
• To create scaffolds with structural support, biomimetic microenvironments, and cell alignment capabilities.
• To evaluate the efficacy of these scaffolds in enhancing cell adhesion, proliferation, and alignment.

Main Methods:

• Fabrication of multi-scale hierarchical scaffolds using fused deposition modeling, melt electrospinning writing, and solution electrospinning.
• Integration of meso-, micro-, and nano-fibrous filaments for distinct functions.
• Plasma surface modification to improve scaffold wettability, assessed via contact angle measurements.

Main Results:

• The developed 3D printing system successfully fabricated multi-scale hierarchical scaffolds.
• Scaffolds demonstrated enhanced cell adhesion and proliferation in vitro.
• Aligned microfibers within the scaffolds effectively guided cell alignment.

Conclusions:

• Multi-scale hierarchical scaffolds fabricated via the integrated 3D printing system show significant potential in tissue engineering.
• These scaffolds provide a biomimetic microenvironment that supports and guides cell behavior.
• The study validates the approach for creating advanced materials for regenerative medicine.