Link Between Antibiotic Persistence and Antibiotic Resistance in Bacterial Pathogens

Area of Science:

• Microbiology
• Bacterial Physiology
• Antibiotic Tolerance

Background:

• Antibiotic resistance and persistence are distinct bacterial survival mechanisms.
• Resistance is genetically determined and stable, while persistence is a transient physiological state.
• The molecular mechanisms of antibiotic persistence are not well understood, unlike antibiotic resistance.

Purpose of the Study:

• To extend the hypothesis that blocked DNA replication initiation causes bacterial persistence.
• To propose that bacteria in a persistence state are more susceptible to developing antibiotic resistance.
• To investigate the link between persistence, DNA replication, and mutation-based resistance.

Main Methods:

• Review and extension of existing hypotheses on bacterial persistence.
• Analysis of the role of DNA replication initiation complex (ATP-DnaA) in persistence.
• Theoretical consideration of error-prone DNA repair functions in conjunction with persistence.

Main Results:

• Persistence may arise from the inability to re-initiate DNA replication due to insufficient ATP-DnaA.
• Bacterial populations in a persistence state may exhibit increased susceptibility to mutation-based antibiotic resistance.
• This increased susceptibility is particularly relevant when exposed to bactericidal antibiotics (BCAs).

Conclusions:

• Bacterial persistence is a physiological state linked to blocked DNA replication initiation.
• Persistence can create a window of opportunity for the stochastic development of antibiotic resistance.
• Understanding persistence mechanisms is crucial for developing new strategies against antibiotic-tolerant bacteria.