Growth Plate Injury Repair Mechanisms

Growth plates, or physes, are specialised cartilaginous regions at the ends of long bones responsible for longitudinal growth. Injury to these structures during childhood can disrupt endochondral ossification, leading to premature bony bridge formation, growth arrest and angular deformities. Repair mechanisms aim to restore the zonal architecture of resting, proliferative, hypertrophic and ossification layers, re-establishing chondrogenesis while preventing unwanted osteogenesis. Strategies under investigation combine biomimetic scaffolds, controlled delivery of growth factors, cellular therapies and advanced manufacturing techniques. Preclinical models—from ex vivo organotypic cultures to in vivo rabbit and rodent studies—have elucidated the roles of the extracellular matrix, inflammatory mediators and mechanical cues in guiding repair. Recent progress highlights the importance of creating a hypoxic, chondrogenic microenvironment and the sequential release of anti-angiogenic and pro-cartilaginous signals to inhibit bone bridge formation and encourage regeneration of growth plate cartilage.

Research from Nature Portfolio

A seminal study demonstrated that an acellular, oriented extracellular matrix scaffold derived from native growth plate tissue, combined with autologous bone marrow mesenchymal stem cells, effectively prevented bone bridge formation in a rabbit proximal tibial injury model. Using freeze-drying and cross-linking to preserve glycosaminoglycans and type II collagen in a columnar architecture, the scaffold provided structural cues that guided stem cell differentiation towards chondrocytes. Histological evaluation revealed neogenetic hyaline cartilage with minimal osteogenesis, while radiographic assessment showed reduced angular deformity and length discrepancy. This work underscores the potential of biomimetic scaffolds in restoring the zonal organisation necessary for normal longitudinal bone growth.

Growth Plate Injury Repair Mechanisms publication trend

The graph below shows the total number of articles in growth plate injury repair mechanisms across all publications each year (not limited to Nature Index journals).

Technical terms

Growth plate: Cartilaginous region at the ends of long bones responsible for bone elongation.

Endochondral ossification: Process by which cartilage is progressively replaced by bone.

Chondrogenesis: Differentiation of progenitor cells into cartilage-producing chondrocytes.

Bone bridge: Premature bony connection across an injured growth plate that halts normal growth.

Extracellular matrix (ECM): Network of proteins and glycosaminoglycans providing structural and biochemical cues.

Hydrogel: Water-rich polymer network used as a biomaterial scaffold.

Mesenchymal stem cell: Multipotent progenitor cell capable of differentiating into cartilage, bone and other tissues.

References

1. Treatment of rabbit growth plate injuries with oriented ECM scaffold and autologous BMSCs. Scientific Reports (2017).
2. Disruption of Endochondral Ossification and Extracellular Matrix Maturation in an Ex Vivo Rat Femur Organotypic Slice Model Due to Growth Plate Injury. Cells (2023).
3. Injectable hydrogel loaded with bilayer microspheres to inhibit angiogenesis and promote cartilage regeneration for repairing growth plate injury. Frontiers in Bioengineering and Biotechnology (2023).
4. 3D bioprinted hydrogel/polymer scaffold with factor delivery and mechanical support for growth plate injury repair. Frontiers in Bioengineering and Biotechnology (2023).