Enhanced Osteogenesis by Combining Exogenous BMPs with Hydroxyapatite/Aragonite Bone Grafts: In Vitro and In Vivo
Hong Lu1, Ines Sousa Dos Santos1, Emma Steijvers2
1Swansea University Medical School, Faculty of Medicine, Health and Life Science, Swansea University, Swansea SA2 8PP, UK.
Journal of Functional Biomaterials
|October 28, 2025
Summary
This study enhanced synthetic bone graft materials by adding decellularized bone matrix with bone morphogenetic proteins (BMPs). The functionalized material significantly increased new bone formation in animal models.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Orthopedic Research
Background:
- Synthetic biomaterials lack osteogenic growth factors, limiting their use as bone graft substitutes.
- Enhancing osteogenesis is crucial for effective bone regeneration therapies.
Purpose of the Study:
- To enhance the osteogenic capacity of a novel hydroxyapatite/aragonite (HAA) biomaterial.
- To incorporate decellularized bone matrix with bone morphogenetic proteins (BMP)-2 and BMP-7 (BMP-2/7).
Main Methods:
- Co-culture of human umbilical mesenchymal stem cells (MSCs) with HEK-293T cells expressing BMP-2/7.
- Implantation of functionalized HAA in murine models.
- Assessment of bone formation using micro-CT, histology, and gene expression analysis.
Main Results:
- MSCs proliferated and differentiated on HAA.
- Successful secretion of BMP-2/7 by engineered HEK-293T cells.
- Significant increase in new bone formation in the functional HAA group compared to controls.
Conclusions:
- An artificial allograft integrating synthetic biomaterials and functional organic components was created.
- Functional decellularized matrix comprising BMP-2/7 enhances bone formation.
- In vitro tissue engineering approaches can improve synthetic biomaterial performance for bone regeneration.
