Medicinal Chemistry Updates on Bacterial Efflux Pump Modulators.

Area of Science:

• Microbiology
• Pharmacology
• Medicinal Chemistry

Background:

• Antibiotic resistance is a critical global health challenge.
• Efflux pumps, which extrude antibiotics from bacterial cells, are a key mechanism contributing to this resistance.
• Overexpression of these pumps leads to treatment failure by reducing intracellular drug concentrations.

Purpose of the Study:

• To provide a comprehensive review of efflux pump inhibitors (EPIs).
• To discuss various sources of EPIs, including natural, synthetic, and existing drugs.
• To highlight structure-activity relationships (SAR) of EPIs for guiding the development of novel compounds.

Main Methods:

• Literature review of efflux pump inhibitor classes.
• Analysis of efflux pump families (ABC, MFS, RND, SMR, MATE).
• Examination of structure-activity relationships for identified inhibitors.

Main Results:

• Efflux pumps are categorized into five families based on their characteristics.
• The MFS and RND families are significantly associated with antibiotic resistance.
• Numerous EPIs from diverse sources have been identified, with varying SAR.

Conclusions:

• Efflux pump inhibition is a promising strategy to combat antibiotic resistance.
• Understanding SAR is crucial for designing effective novel EPIs.
• This review offers valuable insights for medicinal chemists in the development of new antibacterial therapies.