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Engineered Metallic Ion-Based Hydrogel for Tendon-Bone Reconstruction.

Xinyu Zhang1,2, Jun Ma2,3, Hanyin Hu2,3

  • 1Bengbu Medical College, Bengbu 233030, China.

ACS Applied Materials & Interfaces
|January 31, 2024
PubMed
Summary

This study developed a metallic ion-based hydrogel scaffold to enhance rotator cuff regeneration. The engineered scaffold promotes blood vessel and bone growth, reduces inflammation, and improves tendon-bone healing.

Keywords:
bioorthogonal click reactionclickable mussel-inspired peptidehydrogelmagnesium organic frameworktendon-bone

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Orthopedic Surgery

Background:

  • Rotator cuff regeneration is challenging due to poor vascularization, inflammation, and poor tendon-bone healing.
  • Current treatments often fail to fully restore function, necessitating innovative regenerative strategies.

Purpose of the Study:

  • To engineer a metallic ion-based hydrogel scaffold for enhanced rotator cuff regeneration.
  • To evaluate the scaffold's potential for promoting angiogenesis, osteogenesis, and modulating inflammation.
  • To assess the scaffold's efficacy in a rat rotator cuff injury model.

Main Methods:

  • Fabrication of a metallic ion-based hydrogel scaffold using bioorthogonal click chemistry and photopolymerization.
  • In vitro assessment of the hydrogel's effects on endothelial cells, mesenchymal stem cells, and macrophages.
  • In vivo evaluation in a rat rotator cuff injury model using imaging and immunohistochemistry.

Main Results:

  • The hydrogel scaffold successfully promoted angiogenesis and osteogenic differentiation in vitro.
  • It modulated macrophage polarization from pro-inflammatory M1 to anti-inflammatory M2.
  • In vivo studies demonstrated effective rotator cuff regeneration and excellent biocompatibility in rats.

Conclusions:

  • The developed metallic ion-based hydrogel scaffold serves as an effective platform for releasing metal ions and peptides.
  • This approach accelerates rotator cuff regeneration and shows significant promise for clinical applications in rotator cuff therapy.