Rapid Biofilm Eradication on Bone Implants Using Red Phosphorus and Near‐Infrared Light |
| |
| Authors: | Lei Tan Jun Li Xiangmei Liu Zhenduo Cui Xianjin Yang Shengli Zhu Zhaoyang Li Xubo Yuan Yufeng Zheng Kelvin W K Yeung Haobo Pan Xianbao Wang Shuilin Wu |
| |
| Affiliation: | 1. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry‐of‐Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan, China;2. School of Materials Science & Engineering, Tianjin University, Tianjin, China;3. State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, China;4. Department of Orthopaedics & Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China;5. Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China |
| |
| Abstract: | Bone‐implant‐associated infections are common after orthopedic surgery due to impaired host immune response around the implants. In particular, when a biofilm develops, the immune system and antibiotic treatment find it difficult to eradicate, which sometimes requires a second operation to replace the infected implants. Most strategies have been designed to prevent biofilms from forming on the surface of bone implants, but these strategies cannot eliminate the biofilm when it has been established in vivo. To address this issue, a nonsurgical, noninvasive treatment for biofilm infection must be developed. Herein, a red‐phosphorus–IR780–arginine–glycine–aspartic‐acid–cysteine coating on titanium bone implants is prepared. The red phosphorus has great biocompatibility and exhibits efficient photothermal ability. The temperature sensitivity of Staphylococcus aureus biofilm is enhanced in the presence of singlet oxygen (1O2) produced by IR780. Without damaging the normal tissue, the biofilm can be eradicated through a safe near‐infrared (808 nm) photothermal therapy at 50 °C in vitro and in vivo. This approach reaches an antibacterial efficiency of 96.2% in vivo with 10 min of irradiation at 50 °C. Meanwhile, arginine–glycine–aspartic‐acid–cysteine decorated on the surface of the implant can improve the cell adhesion, proliferation, and osteogenic differentiation. |
| |
| Keywords: | antibiofilm bone‐implants osteogenic differentiation photothermal therapy red phosphorus |
|
|
