Silver Peroxide Nanoparticles for Combined Antibacterial Sonodynamic and Photothermal Therapy
Xuelong Bi, Qiang Bai, Manman Liang, Dongqin Yang, Siheng Li, Lina Wang, Jing Liu, William W. Yu, Ning Sui, Zhiling Zhu
Abstract
Abstract Metal peroxide nanoparticles designed to elevate the oxidative stress are considered a promising nanotherapeutics in biomedical applications, including chemotherapy, photodynamic therapy, and bacterial disinfection. However, their lack of specificity towards the therapeutic target can cause toxic side effects to healthy tissues. Here, silver peroxide nanoparticles (Ag 2 O 2 NPs) capable of controlled reactive oxygen species (ROS) release are synthesized. The release of bactericidal Ag + ions and ROS is strictly regulated by external stimuli of ultrasound (US) and near‐infrared (NIR) light. In vitro and in vivo investigations show that the Ag 2 O 2 NPs present enhanced antibacterial and antibiofilm capabilities with a killing efficiency >99.9999% in 10 min, significantly accelerate multi‐drug resistant Staphylococcus aureus infected skin wound closure with excellent cytocompatibility and hemocompatibility. This work not only provides the first paradigm for fabricating silver peroxide nanoparticle but also introduces a highly efficient noninvasive and safe therapeutic modality for combating bacterial infectious diseases.