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Bailong Tao,Chuanchuan Lin,Ai Guo,Yonglin Yu,Xian Qin,Kai Li,Hongchuan Tian,Weiwei Yi,Dengliang Lei,Lixue Chen 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.104 No.-
Infected wound healing remains a critical threat, which frequently delays the healing process and evenleads to severe life-threatening complications. Herein, we reported an effective anti-infection approach,which was based on copper ions-releasing hydroxyapatite/polydopamine (HA-Cu/PDA) nanocompositeswith photothermal effect. The HA-Cu/PDA nanocomposites was fabricated through a co-precipitationreaction between polydopamine (PDA)-coated hydroxyapatite nanoparticles (HA)-loaded Cu2+ (HA-Cu). Through a synergistic effect of released Cu2+ and photothermal efficiency of PDA coating, and the HACu/PDA nanocomposites exhibited extraordinary antibacterial capacities against Escherichia coli (E. coli)and Staphylococcus aureus (S. aureus). The nanocomposites presented good biocompatibility for mouseembryonic fibroblast (NIH-3T3) cells and promoted NIH3T3 cells to migrate toward wound sites. Additionally, this nanocomposite could stimulate the tissue remodeling-related gene expression toinduce the blood vessels formation, granulation tissues and collagen deposition, and eventually enhancewound healing. In vivo study further verified that HA-Cu/PDA nanocomposites with NIR irradiation couldsignificantly improve bacterial infected wound healing through the prominent antibacterial property,reduced inflammatory response, the formation of granulation tissue, collagen deposition, and angiogenesisability. Thus, this study develops a versatile strategy for a broad range of wound healing and skinreconstruction caused by bacterial infection.
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