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Immunomodulatory multicellular scaffolds for tendon-to-bone regeneration
Lin Du1,2, Jinfu Wu1,2, Yahui Han1,2
1State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, P. R. China.
Science Advances
|March 8, 2024
Summary
New multicellular scaffolds with manganese silicate nanoparticles promote tendon-to-bone healing by modulating the immune environment and enabling integrated tissue regeneration.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Immunology
Background:
- Tendon-to-bone injuries limit motor function due to structural loss, with current treatments focusing on single-tissue regeneration.
- Conventional biomaterials often neglect the immune microenvironment and lack multi-tissue regenerative capabilities, leading to suboptimal outcomes.
- Integrated regeneration of tendon and bone interfaces remains a significant challenge in regenerative medicine.
Purpose of the Study:
- To develop novel immunomodulatory multicellular scaffolds for integrated tendon-to-bone regeneration.
- To investigate the role of manganese silicate (MS) nanoparticles in enhancing scaffold bioactivity and immune regulation.
- To evaluate the efficacy of these scaffolds in promoting functional recovery at tendon-to-bone interfaces.
Main Methods:
- Fabrication of multicellular scaffolds integrating MS nanoparticles with tendon/bone-related cells.
- Incorporation of biomimetic cellular distribution and MS nanoparticles within the scaffolds.
- Assessment of scaffold bioactivities, macrophage regulation, and differentiation enhancement.
- In vivo evaluation of scaffold performance in animal models of tendon-to-bone injury.
Main Results:
- The developed multicellular scaffolds demonstrated diverse bioactivities and enhanced specific cell differentiation.
- MS nanoparticles modulated macrophage behavior, primarily through Mn ion-induced PGE2 secretion, promoting tissue regeneration.
- Animal studies confirmed scaffold-induced immunomodulation, integrated regeneration, and functional recovery at tendon-to-bone interfaces.
Conclusions:
- Multicellular scaffolds incorporating MS nanoparticles offer a promising strategy for the integrated regeneration of tendon-to-bone interfaces.
- This approach innovatively utilizes inorganic biomaterials for immunomodulation and simultaneous soft/hard tissue regeneration.
- The findings provide a new concept for addressing complex tissue interface injuries through biomaterial-based immunomodulation.
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