Chiral peptidoglycan mimics target bacterial wall biosynthesis for pathogen intervention

Area of Science:

• Microbiology
• Biochemistry
• Drug Discovery

Background:

• The increasing global burden of microbial infections and antimicrobial resistance necessitates novel antibacterial strategies.
• Current bacterial recognition methods lack precision, hindering effective treatment development.

Purpose of the Study:

• To design and evaluate chirality-specific peptidoglycan mimics (D-PM) for broad-spectrum bacterial recognition.
• To elucidate the mechanism of D-PM incorporation into bacterial cell walls.
• To explore D-PM applications in pathogen imaging and targeted antibiotic delivery.

Main Methods:

• Synthesis of D-alanine-conjugated peptidoglycan mimics (D-PM).
• In vitro assessment of D-PM recognition against various bacterial pathogens (ESKAPE, resistant strains, clinical isolates) and eukaryotic cells.
• Elucidation of the molecular recognition mechanism via incorporation into peptidoglycan biosynthesis.
• Evaluation of D-PM in localized and systemic infection models for imaging and therapeutic efficacy.

Main Results:

• D-PM demonstrated broad-spectrum recognition of bacterial pathogens with minimal interaction with host cells.
• The mechanism of recognition involves D-PM acting as biosynthetic substrates and incorporation into peptidoglycan.
• D-PM facilitated pathogen-specific imaging and targeted antibiotic delivery systems.
• In vivo studies showed efficient pathogen localization, tissue penetration, and improved therapeutic outcomes.

Conclusions:

• D-PM represents a molecularly engineered strategy for precise bacterial recognition and intervention.
• The findings offer insights into macromolecular mimic assimilation into bacterial biosynthesis.
• This approach provides a translational strategy to combat the escalating threat of infectious diseases.