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High-throughput Screening of Chemical Compounds to Elucidate Their Effects on Bacterial Persistence
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Clarifying the Link between Toxin-Antitoxin Modules and Bacterial Persistence.

Séverin Ronneau1, Sophie Helaine1

  • 1Section of Microbiology, Medical Research Council Centre for Molecular Bacteriology and Infection, Imperial College London, London SW7 2AZ, United Kingdom.

Journal of Molecular Biology
|March 28, 2019
PubMed
Summary

Antibiotic persistence allows bacteria to survive drug exposure, but its mechanisms are unclear. This review examines toxin-antitoxin (TA) systems as key regulators of bacterial persistence and antibiotic tolerance.

Keywords:
PersistenceToxin-antitoxin modulesantibioticstolerance

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Genetics

Background:

  • Antibiotic persistence is a transient multidrug-tolerant state in bacteria.
  • This persistence contributes to the recalcitrance of bacterial infections.
  • Understanding persistence mechanisms is crucial for eradicating bacterial infections.

Purpose of the Study:

  • To review the evidence linking toxin-antitoxin (TA) systems to antibiotic persistence.
  • To clarify the role of TA systems in bacterial multidrug tolerance.
  • To discuss limitations in current research on TA systems and bacterial persistence.

Main Methods:

  • Literature review of studies on bacterial persistence and TA systems.
  • Analysis of evidence supporting and refuting the role of TA systems.
  • Discussion of experimental limitations in the field.

Main Results:

  • Toxin-antitoxin (TA) systems are frequently implicated in bacterial persistence.
  • Overexpression of TA toxins can increase persister cell frequency.
  • Conflicting evidence exists, leading to confusion regarding TA systems' precise role.

Conclusions:

  • TA systems are strong candidates for regulating antibiotic persistence.
  • Further research is needed to resolve conflicting evidence and understand TA system function in persistence.
  • Addressing limitations in current studies is essential for advancing the field.