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Related Experiment Video

Updated: Jun 15, 2025

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Structure, ingredient, and function-based biomimetic scaffolds for accelerated healing of tendon-bone interface.

YuHan Dong1, JiangFeng Li2, Qiang Jiang1

  • 1College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China.

Journal of Orthopaedic Translation
|August 26, 2024
PubMed
Summary

A novel biomimetic scaffold effectively promotes tendon-bone healing by mimicking natural tissue structure and composition. This hierarchical scaffold enhances regeneration and shows potential for clinical applications in tendon-bone repair.

Keywords:
Alg/Col-I hydrogelBiomimetic scaffoldPLLA oriented fibersTendon-bone healingnHA/PLGA scaffold

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Tendon-bone interface (TBI) repair is challenging due to its complex hierarchical structure, gradient composition, and function.
  • Existing repair methods are often slow and ineffective.
  • A biomimetic scaffold is needed to address these challenges.

Purpose of the Study:

  • To fabricate a novel hierarchical scaffold mimicking the structure, composition, and function of the natural TBI.
  • To evaluate the scaffold's ability to promote gradient differentiation of cells.
  • To assess the efficacy of the scaffold in promoting tendon-bone healing in an animal model.

Main Methods:

  • Fabricated a tri-layered scaffold using poly-lactic-co-glycolic-acid, nano-hydroxyapatite, BMP2-gelatin, sodium alginate, type I collagen, and TGF-β3.
  • Oriented L-poly-lactic-acid fibers to simulate tendon structure.
  • Characterized scaffold properties including morphology, kinetics, degradation, and mechanical strength.
  • Evaluated gradient differentiation of bone marrow mesenchymal stem cells (BMSCs) and tenocytes.
  • Implanted BMSCs-seeded scaffolds into a rat Achilles tendon defect model and assessed healing outcomes.

Main Results:

  • The hierarchical scaffold exhibited gradual composition and mechanical properties matching TBI characteristics.
  • The scaffold demonstrated gradient differentiation inductivity by providing a suitable microenvironment for cells.
  • Scaffolds seeded with BMSCs significantly accelerated healing in rat Achilles tendon defects.
  • Histological and biomechanical assessments confirmed enhanced tendon-bone healing quality.

Conclusions:

  • Hierarchical scaffolds simulating TBI effectively promote regeneration and enhance healing quality.
  • The developed scaffold offers a promising microenvironment for tendon-bone healing.
  • This biomimetic scaffold holds significant potential for clinical applications in TBI repair.