Strategies for skeletal muscle tissue engineering: seed vs. soil

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Current tissue engineering relies on ex vivo cell-scaffold constructs for tissue replacement.
• These constructs require culture and conditioning to mimic native tissues.
• Host response to implanted engineered tissues presents a significant challenge.

Purpose of the Study:

• To review cell types (seed) and scaffold materials (soil) for tissue engineering.
• To examine challenges in functional tissue engineering.
• To present acellular biologic scaffolds as an alternative to cell-based approaches.

Main Methods:

• Review of literature on cell-based and acellular scaffold approaches in tissue engineering.
• Examination of seed cells and scaffold materials.
• Discussion of challenges in functional tissue engineering, using skeletal muscle as a prototype.

Main Results:

• Cell-based tissue engineering involves combining cells and scaffolds ex vivo.
• Acellular scaffolds can attract endogenous cells and remodel in vivo.
• Skeletal muscle serves as a model, but principles apply broadly.

Conclusions:

• Acellular scaffolds present a promising alternative to cell-based tissue engineering by leveraging host cell recruitment.
• Careful selection of cell types and scaffold materials is crucial for successful tissue regeneration.
• Overcoming host response and achieving functional tissue mimicry remain key challenges in the field.