Osteochondral defect regeneration is challenging due to the mismatch between cartilage and subchondral bone. We developed a functionalized scaffold replicating the natural architecture, biochemical and biomechanical environment of both tissues to promote concurrent regeneration. Our bilayered, zone-specific scaffold combines tailored materials for each tissue type: gelatin methacryloyl (GelMA), modified hyaluronic acid, and umbilical cord-derived extracellular matrix (ECM) for the cartilage layer; GelMA, placenta-derived ECM, and nano amorphous calcium phosphate for the osseous layer. Using 3D digital light-processing printing, we constructed the scaffold with spatially distributed biochemical and biomechanical signaling. This approach created dual chondro-/osteogenic microenvironments facilitating bone marrow mesenchymal stem cell differentiation. In vivo studies demonstrated concurrent regeneration of cartilage and subchondral bone tissues with robust integration. This 3D-printed biomimetic scaffold, featuring dual-lineage inductive properties, shows promising potential for efficient osteochondral regeneration and addresses complex tissue engineering requirements.
Journal article
2025-04-09T00:00:00+00:00
17
20613 - 20627
14
DLP 3D printing, bilineage differentiation, biochemical cues, matrix stiffness, osteochondral repair, tissue-derived ECM, Printing, Three-Dimensional, Tissue Scaffolds, Animals, Mesenchymal Stem Cells, Tissue Engineering, Humans, Cell Differentiation, Osteogenesis, Extracellular Matrix, Bone Regeneration, Gelatin, Chondrogenesis, Hyaluronic Acid, Cartilage, Mice, Methacrylates