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Published on: September 16, 2014
Double-pronged Antimicrobial Agents based on a Donor-π-Acceptor Type Aggregation-Induced Emission Luminogen
Yifan Wu1,2, Jiangao Li1,2, Zipeng Shen1
1Center for AIE Research, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China.
A novel red-fluorescent molecule, TTTh, effectively combats drug-resistant bacteria like MRSA by generating reactive oxygen species (ROS) and disrupting bacterial membranes. It also enhances bacterial clearance within cells, showing promise for wound healing with minimal side effects.
Area of Science:
- Organic Chemistry
- Materials Science
- Microbiology
Background:
- Multidrug-resistant (MDR) bacteria pose a significant global health threat, necessitating novel antibacterial strategies.
- Current treatments are limited by resistance, driving the search for new antimicrobial agents.
Purpose of the Study:
- To design and synthesize a novel D-π-A type luminogen with aggregation-induced emission (AIE) properties for antibacterial applications.
- To investigate the antibacterial mechanism of the synthesized molecule, TTTh, against methicillin-resistant Staphylococcus aureus (MRSA).
Main Methods:
- Rational design and facile synthesis of a D-π-A luminogen (TTTh) with red/near-infrared fluorescence and AIE characteristics.
- Evaluation of TTTh's antibacterial activity against MRSA, focusing on reactive oxygen species (ROS) production and membrane integrity.
- Assessment of TTTh's intracellular targeting of lysosomes and its efficacy in a wound healing model.
Main Results:
- The synthesized TTTh exhibited strong red/near-infrared fluorescence and AIE features, along with potent ROS generation.
- TTTh demonstrated significant antibacterial activity against MRSA by inducing ROS accumulation and damaging bacterial membranes.
- TTTh specifically targeted and enhanced lysosomal maturation for intracellular bacterial clearance, leading to reduced bacterial burden and improved wound healing with minimal toxicity.
Conclusions:
- The developed AIE luminogen, TTTh, shows potent antibacterial efficacy against MRSA through ROS generation and membrane disruption.
- TTTh's ability to target lysosomes and promote bacterial clearance offers a novel therapeutic approach for MDR infections.
- This study highlights the potential of AIEgens in developing new antibacterial agents and identifying novel antibacterial targets.
