Abstract
Wound dressing patches based on stem cells have demonstrated promising potential in the treatment of diabetic wounds, while their capabilities in the maintenance of cell stemness, effective exchange of cellular substance, and precise targeting of the stem cells remain to be promoted. Here, a novel stem cell spheroid loaded microneedle (MN@SPs) patch is presented using microfluidic templating technology. By leveraging the precise fluid manipulation capabilities of the microfluidic template, stem cell spheroids (SPs) with uniform size can be generated in situ. The resulting SPs exhibit advanced viability and cell functions, as evidenced by the overexpressed genes related to extracellular matrix organization and angiogenesis. By loading these SPs into the microneedles (MNs), the platform enables the precise delivery and exchange of multiple active substances, which contribute to advanced neovascularization, collagen deposition, and tissue reconstruction of diabetic wounds. Overall, this microfluidic-engineered stem cell therapy platform demonstrates significant promise in promoting wound healing.
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