Electrical stimulation induced pre-vascularization of engineered dental pulp tissue

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Vascularization is crucial for successful pulp tissue regeneration.
• Engineered vascularized dental pulp tissue can serve as a graft substitute for repairing damaged dental pulp.
• Current methods require optimization to promote robust vascular network formation.

Purpose of the Study:

• To investigate the effect of electric fields (EFs) on the development of pre-vascularized engineered dental pulp tissue.
• To explore the molecular mechanisms underlying EF-induced vascularization.
• To assess the potential of EF-treated engineered tissue for dental pulp repair.

Main Methods:

• Co-culture of human dental pulp stem cells (DPSCs) and human umbilical vein endothelial cells (hUVECs) in 3D Matrigel.
• Application of 150 mV/mm electric fields (EFs) to promote vascularization.
• Immunofluorescence staining, live/dead cell viability assays, and RNA sequencing.

Main Results:

• EFs significantly enhanced the formation of a rich vascular network and the presence of odontoblasts in engineered dental pulp tissue.
• Smooth muscle-like cells were observed around newly formed blood vessels, indicating maturation.
• Gene enrichment analysis revealed EF-modulated pathways involved in angiogenesis, cell migration, and the NOTCH and Calcium signaling pathways, with NOTCH1 and IL-6 as key regulators.

Conclusions:

• EFs effectively promote the maturation and stability of blood vessels within engineered dental pulp tissue.
• This study provides a foundation for utilizing EFs in dental pulp angiogenesis and regeneration.
• EF-treated engineered vascularized dental pulp tissue holds promise for clinical applications in dental pulp repair.