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Human induced pluripotent stem cells (hiPSCs) are generated through the reprogramming of somatic cells into an embryonic stem cell-like state, such that vascular cells differentiated from hiPSCs might be a suitable autologous cell source for vascular regeneration. The goal of this study was to assess whether cotransplantation of endothelial cells (ECs) and smooth muscle cells (SMCs) differentiated from hiPSCs could promote neovascularization and tissue repair in a murine dermal wound model. hiPSCs were differentiated into ECs and SMCs; the differentiated cells displayed cell-specific surface markers. Compared to primary somatic cells, ECs and SMCs, which were differentiated from hiPSCs, strongly cooperated to enhance in vitro tubular network formation. In vivo gel assays in athymic nude mice showed that the coimplantation of differentiated ECs and SMCs significantly increased vascularization, unlike that observed in the case of implantation of differentiated ECs alone. In a murine full-thickness wound model, when compared with the transplantation of primary somatic cells or phosphate-buffered saline, cotransplantation of differentiated ECs and SMCs markedly enhanced neovascularization in injured tissues and accelerated wound healing. These results demonstrate that cotransplantation of hiPSC-derived ECs and SMCs may be feasible as a new autologous cell therapy for neovascularization and tissue repair.

Cooperation of Endothelial and Smooth Muscle Cells Derived from Human Induced Pluripotent Stem Cells Enhances Neovascularization in Dermal Wounds