Regrowth-delay body as a bacterial subcellular structure marking multidrug-tolerant persisters

Area of Science:

• Microbiology
• Cell Biology

Background:

• Bacteria can enter a dormant persister state, exhibiting multidrug tolerance and delayed regrowth, complicating infectious disease treatment.
• The properties of persister cells remain poorly understood due to their non-heritability, low abundance, lack of metabolic activity, and heterogeneity.

Purpose of the Study:

• To identify and characterize novel structures associated with bacterial persister cells.
• To investigate the role of these structures in persister cell physiology and persistence depth.

Main Methods:

• Microscopy and protein localization studies to identify and characterize the subcellular structure.
• Analysis of the structure's formation, dissolution, and correlation with persister cell characteristics.

Main Results:

• Discovery of a novel subcellular structure, termed the regrowth-delay body, exclusively in non-growing bacterial cells.
• The regrowth-delay body sequesters key proteins and dissolves upon resumption of cell growth, serving as a marker for persister cells.
• Different states of the regrowth-delay body correlate with varying depths of bacterial persistence.

Conclusions:

• The regrowth-delay body is a key marker for identifying and understanding bacterial persister cells.
• Targeting the formation or dissolution of regrowth-delay bodies may offer new strategies for eradicating persister cells and treating persistent infections.