Antidepressants can induce mutation and enhance persistence toward multiple antibiotics

Area of Science:

• Microbiology
• Pharmacology
• Global Health

Background:

• Antibiotic resistance is a critical global health threat.
• Antidepressants have a significant pharmaceutical market share, comparable to antibiotics.
• The role of antidepressants in driving antibiotic resistance is under-recognized.

Purpose of the Study:

• To investigate the impact of antidepressants on the development of antibiotic resistance.
• To explore the mechanisms by which antidepressants may contribute to antibiotic resistance.
• To assess the potential acceleration of antibiotic resistance emergence due to antidepressant use.

Main Methods:

• Exposure of bacterial cultures to clinically relevant concentrations of antidepressants.
• Phenotypic and genotypic analyses to identify resistance mechanisms.
• Mathematical modeling to predict the long-term effects on antibiotic resistance.

Main Results:

• Antidepressants induced resistance to multiple antibiotics, even after short exposure.
• Enhanced production of reactive oxygen species was linked to increased antibiotic resistance.
• Antidepressant exposure stimulated stress response and efflux pump expression, increasing bacterial persistence.
• Mathematical models predicted accelerated emergence and maintenance of antibiotic resistance.

Conclusions:

• Antidepressants pose a significant, underappreciated risk for exacerbating antibiotic resistance.
• Understanding these mechanisms is crucial for mitigating the global threat of antimicrobial resistance.
• Further research and clinical consideration are needed to address the link between antidepressant use and antibiotic resistance.