Identification of a mechanical signaling pathway activating type 1 fimbriae via a ZraSR two-component system in neonatal meningitis-associated Escherichia coli.

Mechanical cues activate type 1 fimbriae in E. coli K1 via ZraSR two-component system, promoting meningitis in neonatal models.

• Why it matters: Understanding how E. coli K1 senses host interactions is crucial for developing targeted therapies to prevent bacterial crossing of the blood-brain barrier and subsequent meningitis.
• What they did: The study identified a signaling pathway where ZraSR TCS detects mechanical forces from host attachment, binding to fimS promoter, and inducing phase-ON orientation to activate fimbriae expression in E. coli K1.
• The result: Disruption of this pathway reduces bacterial invasion and inflammation, highlighting potential targets for new treatments to combat neonatal meningitis caused by E. coli K1.