
This study investigated the interactions between human umbilical vascular endothelial cells (HUVECs) and dental pulp stem cells (DPSCs) in a cell coculture model. The researchers aimed to understand the role of mesenchymal stem cells (MSCs) and mural cells in promoting the survival of implanted endothelial cells (ECs) and the stabilization of blood vessels. They found that direct coculture of HUVECs and DPSCs led to increased expression of smooth muscle cell (SMC)-specific markers compared to DPSCs alone. The conditioned media from HUVEC+DPSC cocultures also enhanced the expression of SMC-specific markers in DPSCs, and this effect was mediated by transforming growth factor-beta 1 (TGF-β1) and its receptor ALK5. Blocking TGF-β1/ALK5 signaling inhibited the differentiation of DPSCs into SMCs. Overall, TGF-β1 played a crucial role in DPSC differentiation in the coculture system.
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