Persisters, persistent infections and the Yin-Yang model

Area of Science:

• Microbiology
• Infectious Diseases
• Drug Discovery

Background:

• Persisters are quiescent bacterial cells that survive lethal antibiotic treatments.
• These cells are responsible for persistent infections, latent infections, and post-treatment relapse.
• Current definitions and understanding of persister mechanisms are limited.

Purpose of the Study:

• To propose a Yin-Yang model for describing the heterogeneous nature of persisters.
• To review and highlight recent findings on the mechanisms of persister formation and survival.
• To discuss novel treatment strategies and therapeutic targets for persisters.

Main Methods:

• Review of recent scientific literature on bacterial persisters.
• Analysis of identified genes and pathways involved in persister survival.
• Discussion of emerging single-cell techniques for persister research.

Main Results:

• Identified key pathways in persister formation/survival: toxin-antitoxin modules, stringent response, DNA repair, phosphate metabolism, alternative energy, efflux, anti-oxidative defense, and macromolecule degradation.
• Highlighted the need for advanced single-cell techniques to elucidate persister mechanisms.
• Drew parallels between bacterial persisters, other microbes, and cancer stem cells.

Conclusions:

• Persisters represent a significant challenge in treating bacterial infections due to their survival and regrowth capabilities.
• A refined understanding of persister heterogeneity and mechanisms is essential.
• Development of new drugs and vaccines targeting persisters is critical for improved treatment outcomes and potentially for cancer therapy.