Acridine-a neglected antibacterial chromophore

Area of Science:

• Medicinal Chemistry
• Antimicrobial Agents
• Photodynamic Therapy

Background:

• Acridines were historically significant antimicrobial and antimalarial agents, particularly aminoacridines during World War II.
• Their use in antisepsis declined with the advent of more efficacious penicillins.
• Rising antimicrobial resistance necessitates exploring alternative therapeutic strategies.

Purpose of the Study:

• To review the historical and potential future applications of acridine derivatives as antimicrobial agents.
• To highlight the potential of novel acridine derivatives in combating drug-resistant bacterial infections.
• To explore the synergistic effects of aminoacridines with light for enhanced bactericidal activity.

Main Methods:

• Historical literature review of acridine synthesis and application.
• Analysis of acridine efficacy in the context of emerging antibiotic resistance.
• Examination of photodynamic antimicrobial chemotherapy principles involving acridines.

Main Results:

• Acridines, including aminoacridines, demonstrated broad-spectrum antimicrobial and antimalarial activity historically.
• Current trends in antimicrobial resistance suggest a resurgence of interest in acridine-based compounds.
• Topical application of aminoacridines combined with low-power light shows promise for potent, low-dose bactericidal effects.

Conclusions:

• Acridine derivatives represent a viable class of compounds for developing new antimicrobial therapies.
• The combination of acridines with photodynamic approaches offers a novel strategy against resistant pathogens.
• Further research into acridine derivatives is warranted to address the global challenge of antimicrobial resistance.