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Updated: Aug 26, 2025
Author Spotlight: Use of Fish Scales for Bone Remodeling Research – Advancements in Ex Vivo Imaging and Dissecting Cell Interactions
Published on: May 3, 2024
BMSC exosome-enriched acellular fish scale scaffolds promote bone regeneration
Yangyufan Wang1,2, Bin Kong3, Xiang Chen1,2
1State Key Laboratory of Pharmaceutical Biotechnology, Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, 210008, Nanjing, Jiangsu, PR China.
This study developed a novel biomimetic scaffold using decellularized fish scales functionalized with exosomes from bone marrow mesenchymal stem cells (BMSCs). This enhanced scaffold effectively promotes bone regeneration by stimulating stem cell differentiation.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Biomimetic scaffolds are crucial for bone defect repair, with a focus on enhancing osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs).
- Exosomes derived from BMSCs show promise for bone defect repair.
- Current research trends involve modifying acellular scaffolds to improve BMSC osteogenic differentiation.
Purpose of the Study:
- To demonstrate the pro-osteogenic effects of exosomes derived from osteogenic differentiated BMSCs (OBMSCs).
- To present a novel exosome-functionalized decellularized fish scale (DE-FS) scaffold for in vivo bone regeneration.
- To investigate the potential of DE-FS scaffolds loaded with OBMSC exosomes for enhanced bone healing.
Main Methods:
- DE-FS scaffolds were prepared via decellularization and decalcification, ensuring biocompatibility and low immunogenicity.
- The adhesion, proliferation, and osteogenic differentiation of BMSCs on DE-FS scaffolds were evaluated in vitro.
- OBMSC exosomes were loaded onto DE-FS scaffolds, and their efficacy was assessed in a mouse calvarial defect model in vivo.
Main Results:
- DE-FS scaffolds exhibited high biocompatibility and low immunological rejection.
- The anisotropic and porous structure of DE-FS scaffolds promoted BMSC adhesion, proliferation, and exosome loading/release.
- OBMSC exosome-loaded DE-FS scaffolds significantly enhanced BMSC osteogenic differentiation and promoted bone regeneration in vivo.
Conclusions:
- OBMSC-derived exosomes possess pro-osteogenic properties beneficial for bone regeneration.
- DE-FS scaffolds serve as effective carriers for OBMSC exosomes, enhancing their therapeutic potential.
- This exosome-rich biomimetic scaffold offers a promising strategy for bone tissue engineering and clinical applications.
