The relationship between the structure and toxicity of aminoglycoside antibiotics

Area of Science:

• Pharmacology
• Toxicology
• Ototoxicology
• Nephrotoxicology

Background:

• Aminoglycoside antibiotics are crucial for treating severe gram-negative infections, tuberculosis, and neonatal/cystic fibrosis cases.
• However, these drugs can cause significant acute kidney injury and irreversible hearing loss.
• The precise cellular mechanisms underlying aminoglycoside toxicity remain incompletely understood, hindering the development of safer alternatives.

Purpose of the Study:

• To provide an overview of aminoglycoside effects on inner ear and kidney cells.
• To examine structure-toxicity relationships of natural and semisynthetic aminoglycosides.
• To discuss methods for evaluating antibiotic safety and recent advancements in developing safer aminoglycosides.

Main Methods:

• Review of reported cellular effects of aminoglycosides on inner ear and kidney tubular epithelial cells.
• Analysis of structure-toxicity relationships through evaluation of various aminoglycoside compounds.
• Discussion of assays and models used for antibiotic toxicity assessment.

Main Results:

• Aminoglycosides exhibit specific toxic effects on inner ear sensory cells and kidney proximal tubule cells.
• Structure-activity relationship studies have identified certain molecular features associated with increased or decreased toxicity.
• Progress has been made in identifying and developing aminoglycoside derivatives with improved safety profiles.

Conclusions:

• Understanding aminoglycoside cellular targets is key to mitigating toxicity.
• Structure-based drug design offers a rational approach to developing safer aminoglycosides.
• Continued research is essential for optimizing the therapeutic use of these vital antibiotics.