Addressing MRSA infection and antibacterial resistance with peptoid polymers

Area of Science:

• Polymer Chemistry
• Antimicrobial Agents
• Infectious Diseases

Background:

• Methicillin-Resistant Staphylococcus aureus (MRSA) infections pose a significant challenge due to rising antimicrobial resistance.
• Development of novel antibacterial agents is crucial to overcome resistance mechanisms.

Purpose of the Study:

• To synthesize and evaluate protease-resistant peptoid polymers for their efficacy against MRSA.
• To identify optimal peptoid polymer structures for treating various MRSA infection models.

Main Methods:

• Ring-opening polymerization of N-substituted N-carboxyanhydrides (NNCA) for peptoid polymer synthesis.
• In vitro testing against MRSA planktonic and persister cells, and biofilms.
• In vivo evaluation using mouse wound infection, keratitis, and peritonitis models.

Main Results:

• Peptoid polymers demonstrated potent activity against MRSA planktonic and persister cells.
• Effective eradication of highly antibiotic-resistant MRSA biofilms was achieved.
• Superior anti-infectious performance was observed in vivo across multiple infection models.

Conclusions:

• Peptoid polymers exhibit insusceptibility to antimicrobial resistance, a key advantage.
• Their convenient synthesis, structural diversity, and potent antimicrobial activity highlight their therapeutic potential for MRSA infections.
• Peptoid polymers represent a promising strategy to combat MRSA and alleviate the burden of antibiotic resistance.