Abstract
Delayed or non-healing of diabetic wounds is a significant complication,often attributed to high glucose-induced M1 macrophage accumulation,impaired angiogenesis,and reactive oxygen species(ROS)buildup.Addressing this,we introduced a strontium polyphenol network microneedle patch(SrC-MPNs@MN-PP)for percutaneous drug delivery.This patch,formulated with polymer poly(γ-glutamic acid)(γ-PGA)and epsilon-poly-L-lysine(ε-PLL),incorporates strontium polyphenol networks(SrC-MPNs).The release of chlorogenic acid(CGA)from SrC-MPNs not only neutralizes ROS,but strontium ions also foster angiogen-esis.Consequently,SrC-MPNs@MN-PP can ameliorate the diabetic wound microenvironment and expedite healing.