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Wang, Can; Wang, Yulan; Zhang, Lingling; Miron, Richard J.; Liang, Jianfei; Shi, Miusi; Mo, Wenting; Zheng, Shihang; Zhao, Yanbing; Zhang, Yufeng
Advanced materials (Weinheim) 30, Issue: 46Journal Article
Pathogenic bacterial infections and drug resistance make it urgent to develop new antibacterial agents with targeted delivery. Here, a new targeting delivery nanosystem is designed based on the potential interaction between bacterial recognizing receptors on macrophage membranes and distinct pathogen‐associated molecular patterns in bacteria. Interestingly, the expression of recognizing receptors on macrophage membranes increases significantly when cultured with specific bacteria. Therefore, by coating pretreated macrophage membrane onto the surface of a gold–silver nanocage (GSNC), the nanosystem targets bacteria more efficiently. Previously, it has been shown that GSNC alone can serve as an effective antibacterial agent owing to its photothermal effect under near‐infrared (NIR) laser irradiation. Furthermore, the nanocage can be utilized as a delivery vehicle for antibacterial drugs since the gold–silver nanocage presents a hollow interior and porous wall structure. With significantly improved bacterial adherence, the Sa‐M‐GSNC nanosystem, developed within this study, is effectively delivered and retained at the infection site both via local or systemic injections; the system also shows greatly prolonged blood circulation time and excellent biocompatibility. The present work described here is the first to utilize bacterial pretreated macrophage membrane receptors in a nanosystem to achieve specific bacterial‐targeted delivery, and provides inspiration for future therapy based on this concept. To solve the challenge of targeted delivery, macrophage‐membrane‐coated nanocages with the ability to recognize bacteria with photo‐thermal effect is designed to enhance efficient and effective targeted delivery at the infection site. This novel therapy shows excellent bacterial binding with great antibacterial properties, and demonstrates Sa‐M‐GSNCs are promising prospects in the field of antibacterial agents and drug delivery.
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