Do phenothiazines possess antimicrobial and efflux inhibitory properties?

Area of Science:

• Microbiology
• Pharmacology
• Evolutionary Biology

Background:

• Antibiotic resistance is a critical global health issue, threatening modern medicine.
• The development of drug-resistant bacteria is an inevitable evolutionary consequence of antibiotic use.
• A lack of new antibiotic development exacerbates the need for alternative treatment strategies.

Purpose of the Study:

• To explore the potential of antibiotic adjuvants in combating drug resistance.
• To review the efficacy of phenothiazine derivatives as potentiators of existing antibiotics.
• To investigate the inherent antibacterial and efflux inhibitory properties of phenothiazines.

Main Methods:

• Literature review of studies on phenothiazines and antibiotic resistance.
• Analysis of evidence for phenothiazine activity against Gram-positive and Gram-negative bacteria.
• Examination of phenothiazine mechanisms, including efflux inhibition.

Main Results:

• Phenothiazines can potentiate the activity of antibiotics against resistant bacteria.
• Phenothiazines exhibit intrinsic antibacterial effects.
• Phenothiazines possess efflux inhibitory properties that can overcome resistance.

Conclusions:

• Phenothiazines represent a promising class of compounds for use as antibiotic adjuvants.
• Understanding phenothiazine mechanisms is key to developing new agents to combat antibiotic resistance.
• Repurposing phenothiazines offers a viable strategy to address the growing threat of resistant infections.