Aggregation-Induced Emission Photosensitizer with Ag(I)−π Interaction-Enhanced Reactive Oxygen Species for Eliminating Multidrug Resistant Bacteria

Peng, Senlin; Song, Jiayi; Wu, Shouting; Wang, Qian; Shen, Lingyi; Li, Dongmei; Peng, Jian; Zhang, Qilong; Yang, Xianjiong; Xu, Hong; Redshaw, Carl; Li, Ying

Abstract

Multidrug-resistant (MDR) bacteria pose serious threats to public health due to the lack of effective and biocompatible drugs to kill MDR bacteria. Photodynamic antibacterial therapy has been widely studied due to its low induction of resistance. However, photosensitizers that can efficiently generate reactive oxygen species (ROS) through both type I and type II mechanisms and that have the capability of multiple modes of action are rarely reported. Addressing this issue, we developed a near-infrared-emitting triphenylamine indole iodoethane (TTII) and its silver(I) self-assembled (TTIIS) aggregation-induced emission (AIE) photosensitizer for multimode bacterial infection therapy. TTII can efficiently produce both Type I ROS •OH and Type II ROS 1O2. Interestingly, the Ag(I)−π interaction contributed in TTIIS efficiency promotion of the generation of 1O2. Moreover, by releasing Ag+, TTIIS enabled photodynamic-Ag(I) dual-mode sterilization. As a result, TTIIS achieved an effective enhancement of antibacterial activity, with a 1-2-fold boost against multidrug-resistant Escherichia coli (MDR E. coli). Both TTII and TTIIS at a concentration as low as 0.55 μg mL-1 can kill more than 98% of methicillin resistant Staphylococcus aureus (MRSA) on MRSA-infected full-thickness defect wounds of a mouse, and both TTII and TTIIS were effective in eliminating the bacteria and promoting wound healing.

Citation

Peng, S., Song, J., Wu, S., Wang, Q., Shen, L., Li, D., Peng, J., Zhang, Q., Yang, X., Xu, H., Redshaw, C., & Li, Y. (2024). Aggregation-Induced Emission Photosensitizer with Ag(I)−π Interaction-Enhanced Reactive Oxygen Species for Eliminating Multidrug Resistant Bacteria. ACS Applied Materials & Interfaces, 16(24), 30915-30928. https://doi.org/10.1021/acsami.4c05202

• Journal Article Type: Article
• Acceptance Date: May 29, 2024
• Online Publication Date: Jun 7, 2024
• Publication Date: Jun 19, 2024
• Deposit Date: Jun 22, 2024
• Publicly Available Date: Jun 8, 2025
• Journal: ACS Applied Materials and Interfaces
• Print ISSN: 1944-8244
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 16
• Issue: 24
• Pages: 30915-30928
• DOI: https://doi.org/10.1021/acsami.4c05202
• Public URL: https://hull-repository.worktribe.com/output/4717706