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Preparation of Assemblable Chondral and Subchondral Bone Microtissues for Osteochondral Tissue Engineering
Pengfei Xia1, Shifeng Yan1,2, Guifei Li1,2
1School of Materials Science and Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, People's Republic of China.
ACS Applied Materials & Interfaces
|March 4, 2022
Summary
Researchers developed injectable microtissues for osteochondral tissue engineering. These microtissues promote hyaline-like cartilage and subchondral bone regeneration, offering a novel approach for repairing complex osteochondral defects.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Microtissues offer advantages for minimally invasive tissue regeneration.
- Few studies address osteochondral microtissues for simultaneous cartilage and bone repair.
- Osteochondral defects require strategies supporting both tissue types.
Purpose of the Study:
- To construct injectable chondral and subchondral bone microtissues for osteochondral tissue engineering.
- To evaluate the potential of these microtissues to regenerate hyaline-like cartilage and subchondral bone.
- To provide a novel microtissue-based strategy for osteochondral defect repair.
Main Methods:
- Fabrication of porous, hydrophilic chondral microgels promoting chondrogenesis.
- Development of subchondral microgels supporting osteogenic differentiation of stem cells.
- Stable assembly of injectable microtissues via Michael addition reaction for implantation.
Main Results:
- Chondral microtissues successfully induced hyaline-like cartilage formation.
- Subchondral microtissues supported stem cell osteogenic differentiation and bone formation.
- Implanted osteochondral microtissues facilitated osteochondral-like tissue reconstruction at 12 weeks.
Conclusions:
- Injectable chondral and subchondral microtissues are effective for osteochondral tissue engineering.
- This approach shows promise for simultaneous regeneration of cartilage and subchondral bone.
- The study offers new insights into microtissue applications for osteochondral defect repair.
