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Aligned Collagen Sponges Loaded With Myogenic Factors to Enhance Skeletal Muscle Tissue Regeneration
Natalie G Kozan1, Sean Caswell1, Shreyas Bolla1
1Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey, USA.
Summary
This study developed a novel scaffold to improve muscle regeneration after volumetric muscle loss (VML). The scaffold enhances myofiber formation by controlling the release of insulin-like growth factor-1 (IGF-1).
Area of Science:
- Regenerative Medicine
- Biomaterials Science
- Muscle Physiology
Background:
- Volumetric muscle loss (VML) causes significant functional deficits.
- Current treatments like autologous grafts have complications and limited efficacy.
- Existing muscle scaffolds often fail due to poor cell recruitment and myofiber formation.
Purpose of the Study:
- To develop a novel biopolymer scaffold for controlled release of insulin-like growth factor-1 (IGF-1).
- To enhance myoblast proliferation and differentiation for improved muscle regeneration.
- To investigate the potential of IGF-1 sustained release for VML treatment.
Main Methods:
- Anisotropic collagen sponges with controlled pore sizes were fabricated.
- Heparin conjugation was used to stabilize IGF-binding protein 5 (IGFBP-5)/IGF-1 complexes.
- The scaffold system was designed for sustained release of active IGF-1.
Main Results:
- Scaffolds incorporating heparin, IGFBP-5, and IGF-1 demonstrated the highest myofiber formation up to 4 weeks.
- This suggests effective and sustained release of active IGF-1 from the scaffold.
- The system shows promise for supporting muscle regeneration.
Conclusions:
- The developed scaffold system effectively promotes myofiber formation in vitro.
- Controlled release of IGF-1 via IGFBP-5 stabilization is a viable strategy for VML treatment.
- Further in vivo studies in VML mouse models are warranted to assess functional recovery.
