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Exploring reductive stress as a regulation approach for Pseudomonas Aeruginosa biofilm

Jie Liu1,2, Youzhi Li1, Kairuo Yan1

  • 1Department of Chemistry, The University of Hong Kong, Hong Kong, China.

Iscience
|December 9, 2025
PubMed

Insights

Reductive stress impacts Pseudomonas aeruginosa biofilms. Hydrazine and hydroxylamine show potential in disrupting these resilient infections by targeting key bacterial processes.

Area of Science:

  • Microbiology
  • Biochemistry
  • Infectious Diseases

Background:

  • * *Pseudomonas aeruginosa* biofilms present significant clinical challenges due to antibiotic resistance.
  • * Targeting biofilm formation and eradication is crucial for effective infection control.

Purpose of the Study:

  • * To investigate the role of reductive stress in *P. aeruginosa* biofilm formation and eradication.
  • * To identify redox-active compounds effective against *P. aeruginosa* biofilms.

Main Methods:

  • * Screening of redox-active compounds for biofilm inhibition and disruption.
  • * Mechanistic studies involving pyocyanin production and metabolic activity assays.
  • * Structure-activity relationship analysis and RT-qPCR for gene expression analysis.

Main Results:

  • * Hydrazine (HZ) demonstrated potent activity against *P. aeruginosa* biofilms.
  • * Redox-active compounds suppressed pyocyanin and impaired bacterial metabolism.
  • * Hydroxylamine (HA) showed a favorable efficacy-cytotoxicity balance.
  • * HA treatment inhibited matrix biosynthesis, quorum sensing, and oxidative stress defenses.

Conclusions:

  • * Modulating the redox environment is a viable strategy for combating *P. aeruginosa* biofilms.
  • * Redox-based therapies offer a promising avenue for treating biofilm-associated infections.
  • * Hydroxylamine is a potential candidate for further development in anti-biofilm strategies.
Keywords:
Health sciencesMicrobiologyPharmaceutical science

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