Constructing ROS-Responsive Supramolecular Gel with Innate Antibacterial Properties.

Area of Science:

• Materials Science
• Biomedical Engineering
• Nanotechnology

Background:

• Antibiotic-resistant bacterial infections present a major global health challenge.
• Supramolecular gels with inherent antibacterial capabilities are emerging as promising therapeutic materials.
• There is a need for advanced materials that can specifically target and eliminate bacteria while minimizing host toxicity.

Purpose of the Study:

• To develop a reactive oxygen species (ROS)-responsive supramolecular gel with innate antibacterial properties.
• To investigate the self-assembly, degradation, drug release, biocompatibility, and antibacterial efficacy of the developed gel.

Main Methods:

• Bottom-up synthesis of a supramolecular gel using phenylalanine and hydrazide.
• Characterization using proton nuclear magnetic resonance (¹H NMR), high-resolution mass spectrometry (HRMS), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and rheometry.
• In vitro studies including degradation, drug release, cytotoxicity, and antibacterial assays against Staphylococcus aureus and Escherichia coli.

Main Results:

• The gelators self-assembled via hydrogen bonding and π-π stacking forces.
• The supramolecular gel demonstrated ROS-responsive degradation and controlled drug release.
• The gel exhibited excellent biocompatibility, promoted cell proliferation, and achieved high antibacterial rates (98.6% for S. aureus, 99.1% for E. coli).

Conclusions:

• A novel ROS-responsive supramolecular gel with strong innate antibacterial properties was successfully developed.
• The gel shows significant potential for treating antibiotic-resistant bacterial infections and preventing further resistance development.
• This advanced material offers promising applications in wound healing and infection management.