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Fully Defined 3D Hybrid System for Bone Tissue Engineering: Integration of MeHA-RGD/PCL-TCP Scaffolds With Human Stem
Jolene Quek1, Catarina Vizetto-Duarte1, Kee Woei Ng2,3
1Developmental Biology and Regenerative Medicine Programme, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 308232, Singapore.
Journal of Tissue Engineering and Regenerative Medicine
|July 11, 2025
Summary
This study introduces a novel, animal-component-free method for bone tissue engineering using a peptide-functionalized hydrogel and a 3D-printed device. This approach ensures consistent cell loading and supports stem cell osteogenic differentiation for critical-sized bone defects.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Critical-sized bone defects pose a significant clinical challenge due to the lack of standardized, clinically compliant bone tissue engineering (BTE) protocols.
- Current BTE methods often suffer from high variability and rely on animal-derived components like fetal bovine serum (FBS), hindering clinical translation.
Purpose of the Study:
- To develop a novel, reproducible, and animal-component-free method for bone tissue engineering.
- To create a hybrid 3D system utilizing a peptide-functionalized hydrogel and a 3D-printed device for consistent cell loading and enhanced osteogenic differentiation.
Main Methods:
- Development of a peptide-functionalized photocrosslinkable methacrylated hyaluronic acid (MeHA-RGD) hydrogel as a cell sealant.
- Loading of human adipose-derived stem cells (hASCs) into a 3D porous polycaprolactone-tricalcium phosphate (PCL-TCP) scaffold using a novel 3D-printed vacuum-assisted cell loading device.
- Evaluation of hASC viability and osteogenic differentiation within the MeHA-RGD hydrogel under serum- and xeno-free conditions.
Main Results:
- The MeHA-RGD hydrogel effectively supported human adipose-derived stem cell viability and osteogenic differentiation.
- Outcomes were comparable to conventional fibrin glue, a widely used cell sealant, even without serum or animal-derived components.
- The 3D-printed vacuum-assisted device ensured efficient and consistent cell loading into the scaffold.
Conclusions:
- This study presents the first fully defined hybrid 3D system for bone tissue engineering under complete serum- and xeno-free conditions, utilizing a 3D-printed cell loading device.
- The developed MeHA-RGD hydrogel and loading system offer a promising, reproducible, and clinically translatable alternative to current BTE methods.
- This approach addresses key challenges in BTE, paving the way for accelerated clinical application.
