The impact of modulator therapy on the Pseudomonas aeruginosa cystic fibrosis lung transcriptome.

ETI therapy minimally alters Pseudomonas aeruginosa gene expression in the lungs of people with CF, maintaining a similar bacterial transcriptional state despite treatment.

• Why it matters: Understanding how modulator therapy affects bacterial physiology is crucial for developing effective treatments for persistent P. aeruginosa infections in CF patients.
• What they did: Researchers analyzed P. aeruginosa transcriptomes from human sputum before and after ETI therapy and evaluated laboratory models, including zinc-limited synthetic sputum medium, to replicate human infection conditions.
• The result: Findings suggest ETI has little impact on bacterial gene expression, and zinc-limited synthetic sputum models best mimic human infection, supporting their continued use in studying persistent P. aeruginosa in the postmodulator era.