Diabetic wound infections are a common complication of diabetes,which severely impact patients'quality of life.Effective treatment of diabetic wound infections remains one major challenge in the clinic,partially d...Diabetic wound infections are a common complication of diabetes,which severely impact patients'quality of life.Effective treatment of diabetic wound infections remains one major challenge in the clinic,partially due to the formation of bacterial biofilm and antibiotic resistance.It is imperative to develop non-antibiotic-dependent strategies to efficiently eradicate biofilm infections in diabetic wounds.In this work,an innovative nanospray(CDs-HM)was successfully prepared by linking one acoustic sensitizer(hematoporphyrin monomethyl ether,HMME)to CDs fabricated with hemin,nickel(Ⅱ)chloride,and polymer ethylene imine.CDs-HM exhibited catalase-enhanced sonodynamic properties and photothermal-enhanced chemodynamic properties.In vitro experiments and transcriptomic analysis demonstrated that CDs-HM successfully killed the bacteria and destroyed bacterial biofilm by disrupting bacterial cell membrane integrity,inducing oxidative stress,and inhibiting ATP production through synergistic photothermal therapy/chemodynamic therapy/sonodynamic therapy(PTT/CDT/SDT)effects.In the diabetic wound infection mouse model,CDs-HM remarkably eradicated MRSA biofilm,reduced inflammation levels,and promoted angiogenesis/collagen deposition so as to accelerate wound healing.It is noteworthy that CDs-HM displayed superior bacteria killing and wound healing effects compared with conventional vancomycin and nanosilver dressing interventions.The practicality and effciency of CDs-HM endowed it with broad clinical translation prospects.It paved the way for developing novel strategies for combating diabetic wound infections.展开更多
基金financially supported by the National Natural Science Foundation of China(Grant Nos.82071969,21977065,and U21A6004)Shanxi Province Higher Education"Billion Project"Science and Technology Guidance Project。
摘要Diabetic wound infections are a common complication of diabetes,which severely impact patients'quality of life.Effective treatment of diabetic wound infections remains one major challenge in the clinic,partially due to the formation of bacterial biofilm and antibiotic resistance.It is imperative to develop non-antibiotic-dependent strategies to efficiently eradicate biofilm infections in diabetic wounds.In this work,an innovative nanospray(CDs-HM)was successfully prepared by linking one acoustic sensitizer(hematoporphyrin monomethyl ether,HMME)to CDs fabricated with hemin,nickel(Ⅱ)chloride,and polymer ethylene imine.CDs-HM exhibited catalase-enhanced sonodynamic properties and photothermal-enhanced chemodynamic properties.In vitro experiments and transcriptomic analysis demonstrated that CDs-HM successfully killed the bacteria and destroyed bacterial biofilm by disrupting bacterial cell membrane integrity,inducing oxidative stress,and inhibiting ATP production through synergistic photothermal therapy/chemodynamic therapy/sonodynamic therapy(PTT/CDT/SDT)effects.In the diabetic wound infection mouse model,CDs-HM remarkably eradicated MRSA biofilm,reduced inflammation levels,and promoted angiogenesis/collagen deposition so as to accelerate wound healing.It is noteworthy that CDs-HM displayed superior bacteria killing and wound healing effects compared with conventional vancomycin and nanosilver dressing interventions.The practicality and effciency of CDs-HM endowed it with broad clinical translation prospects.It paved the way for developing novel strategies for combating diabetic wound infections.