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Published on: September 11, 2015
Microenvironment-bionic scaffold and multi-cell spatial patterning for area-specific meniscus regeneration
Shanhong Xie1, Chen Jin1, Yuanqi Ma1
1Plastic Surgery Institute, Shandong Provincial Key Laboratory for Tissue Regeneration and Repair & Reconstruction (Under Preparation), Shandong Second Medical University, Weifang, Shandong, 261053, PR China; National Tissue Engineering Center of China, Shanghai, 200241, PR China.
This study developed a Biomimetic Area-specific Meniscus (BAM) using decellularized extracellular matrix and 3D printing. The BAM successfully mimics native meniscus structure and function for improved tissue regeneration.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Injured meniscal tissue has limited regenerative capacity.
- Conventional meniscal implants lack the native meniscus's area-specific architecture.
- Advanced tissue-engineered alternatives are needed for meniscal repair.
Purpose of the Study:
- To develop a Biomimetic Area-specific Meniscus (BAM) using a synergistic regeneration strategy.
- To integrate biomimetic microenvironmental modulation with spatially organized multicellular patterning.
- To create a functional, heterogeneous meniscal construct that recapitulates native tissue characteristics.
Main Methods:
- Engineered a composite scaffold using meniscus-derived decellularized extracellular matrix (Me-dECM) and a 3D-printed polycaprolactone (PCL) framework.
- Utilized a post-occupancy sacrifice (POS) strategy with thermosensitive Pluronic F-127 hydrogel for precise spatial arrangement of fibrochondrocytes (FCs) and fibroblasts (FBs).
- Fabricated a continuously tripartite meniscal construct with heterogeneous spatial organization.
Main Results:
- The composite scaffold demonstrated favorable bioactivity and mechanical robustness.
- The tripartite BAM design effectively recapitulated native meniscal regional heterogeneity.
- Gradient distributions of collagen types I and II (COL I/II) and sulfated glycosaminoglycans (GAGs) were observed, indicating structural and functional biomimicry.
- In vitro and in vivo assessments confirmed the construct's efficacy.
Conclusions:
- The BAM strategy enables the regeneration of a mechanically competent, gradient-heterogeneous meniscus.
- This approach offers a promising translational pathway for functional meniscal reconstruction.
- The developed BAM successfully achieves structural and functional biomimicry of the native meniscus.
