Engineering an Integrated Bioprocess to Produce Human Dental Pulp Stem Cell-Alginate-Based Bone Organoids

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Stem Cell Biology

Background:

• Bone tissue engineering (BTE) offers solutions for prosthetic limitations.
• Mesenchymal stem cells (MSCs), particularly human dental pulp stem cells (hDPSCs), are promising for BTE due to their proliferative and osteogenic potential.
• hDPSCs present advantages over human bone marrow stem cells (hBM-SCs), including accessibility and fewer ethical concerns.

Purpose of the Study:

• To investigate the osteogenic differentiation of hDPSCs within alginate hydrogels.
• To develop and evaluate a novel perfusion bioreactor system for large-scale BTE construct production.
• To compare the novel system with traditional 3D static and fed-batch culture methods.

Main Methods:

• Encapsulation of hDPSCs in alginate hydrogels.
• Culture in a novel perfusion bioreactor under suspended conditions.
• Comparison with 3D static and fed-batch culture systems.

Main Results:

• The novel perfusion bioreactor system demonstrated enhanced osteogenic differentiation.
• Higher alkaline phosphatase activity was observed in the novel system.
• The system produced more homogeneous, dense, and functional bone constructs with mature osteoblast-like and osteocyte-like cells.

Conclusions:

• A novel bioprocess using a perfusion bioreactor effectively promotes hDPSC osteogenic differentiation.
• This system yields high-quality, clinically relevant bone-like constructs.
• The developed bioprocess shows potential for translation from laboratory research to clinical facilities.