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Updated: May 22, 2025
Applying a Three-dimensional Uniaxial Mechanical Stimulation Bioreactor System to Induce Tenogenic Differentiation of Tendon-Derived Stem Cells
Published on: August 1, 2020
SDF-1α/BMP-12 loaded biphasic sustained-release SIS hydrogel/SA microspheres composite for tendon regeneration
Bo-Quan Qin1, Shi-Zhou Wu1, Rong Nie1
1Department of Orthopedic Surgery and Orthopedic Research Institute, Stem Cell and Tissue Engineering Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China.
This study developed a novel injectable hydrogel composite for tendon regeneration. The material delivers growth factors in a controlled manner, promoting healing and offering clinical potential for tendon injuries.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Tendon injuries pose significant challenges due to limited natural healing capacity.
- Tendon healing involves complex inflammatory, proliferative, and remodeling phases.
Purpose of the Study:
- To develop an injectable composite for effective tendon regeneration across different healing stages.
- To co-encapsulate stromal cell derived factor-1α (SDF-1α) and bone morphogenetic protein-12 (BMP-12) for controlled release.
Main Methods:
- An injectable small intestinal submucosa hydrogel/sodium alginate microspheres (SIS/SA) composite was fabricated.
- BMP-12 was encapsulated into SA microspheres using microfluidics.
- Microspheres were then incorporated into SDF-1α loaded SIS hydrogel.
Main Results:
- The SIS/SA composite demonstrated biphasic and controlled release of SDF-1α and BMP-12.
- This release strategy facilitated early-stage cell recruitment and long-term tendon differentiation.
- Composite degradation accelerated regeneration via immune regulation, angiogenesis, and ECM synthesis.
Conclusions:
- The developed SIS/SA composite presents a promising strategy for tendon regeneration.
- The findings highlight significant clinical potential for treating tendon injuries.
