Fast Autograft Generation Using Transferable 3D Keratinocyte Cell Sheet on PEDOT:PSS Composite PDMS Membrane for Enhancing Wound Healing

The application of cell sheet technology for wound healing preserves dense cell tissue and the natural extracellular matrix (ECM), contributing to disease prevention. Despite the effectiveness of autologous and allograft cell sheets for wound healing, conventional cell sheets, although stable, may experience necrosis in their middle layers due to a lack of nutrients or oxygen. To address these issues, a novel approach is proposed to create cell sheets using mechanical and electrical stimulation. This method not only facilitates the transfer of cell sheets but also enhances cell bioactivity. The performance of the proposed membrane, with a mechanically controlled microstructure under electrical stimulation, is validated in both in vitro and in vivo models. The micro-structured membrane allows for diverse electrical stimulation compared to flat membranes, which accelerates the detachment of cell sheets and promotes angiogenesis and re-epithelialization. These findings indicate that the innovative cell sheet technology could significantly enhance rapid wound healing in regenerative medicine.