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Ceramic Omnidirectional Bioprinting in Cell-Laden Suspensions for the Generation of Bone Analogs
Published on: August 8, 2022
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Sequential construction of vascularized and mineralized bone organoids using engineered ECM-DNA-CPO-based bionic
Tingting Gai1,2,3,4,5, Hao Zhang1,2,5,6, Yan Hu6
1Institute of Translational Medicine, Shanghai University, Shanghai, 200444, China.
Bioactive Materials
|March 27, 2025
Summary
Researchers developed novel bionic matrix hydrogels to create functional bone organoids. This breakthrough offers a promising strategy for bone reconstruction, addressing limitations of current bone grafts.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Allogeneic and artificial bone grafts have limitations for bone reconstruction.
- Existing bone organoids lack vascularization and mineralization crucial for functional bone tissue.
- Developing bone-mimicking matrices and dynamic culture systems is essential for mature bone organoid cultivation.
Purpose of the Study:
- To engineer novel bionic matrix hydrogels for functional bone organoid construction.
- To develop a dynamic culture system for cultivating vascularized and mineralized bone organoids.
- To evaluate the efficacy of engineered bionic matrix hydrogels in repairing cranial defects.
Main Methods:
- Fabrication of multifunctional, double-network bionic matrix hydrogels using calcium phosphate oligomers (CPO), decellularized extracellular matrix (ECM), and salmon DNA via photo-crosslinking and self-assembly.
- Culturing bone marrow mesenchymal stromal cells (BMSCs) within the engineered hydrogels.
- Sequential construction of vascularized and mineralized bone organoids using in vitro dynamic culture and in vivo heterotopic ossification.
- Assessment of the hydrogels' performance in cranial defect repair.
Main Results:
- The engineered bionic matrix hydrogels promoted BMSC recruitment, proliferation, osteogenesis, and angiogenesis.
- Vascularized and mineralized bone organoids were successfully constructed.
- The engineered bionic matrix demonstrated efficient bone repair in cranial defects.
- The developed hydrogels and dynamic culture system provide a viable strategy for functional bone organoid generation.
Conclusions:
- Engineered bionic matrix hydrogels incorporating CPO, ECM, and DNA offer a promising platform for bone organoid development.
- The combination of these hydrogels with a dynamic culture system facilitates the creation of functional, vascularized, and mineralized bone organoids.
- This approach represents a significant advancement in tissue engineering for bone reconstruction, particularly for critical-sized bone defects.
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