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Updated: May 15, 2025

Stimulation of Cytoplasmic DNA Sensing Pathways In Vitro and In Vivo
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Extracellular nucleic acid-triggered precision responsive antibacterial strategy.

Haiyan Qiu1, Huiping Chen1, Guanze Huang1

  • 1Department of Health Inspection and Quarantine, School of Public Health, Fujian Medical University, Fuzhou, Fujian 350122, P.R. China.

Journal of Applied Microbiology
|April 9, 2025
PubMed
Summary

This study developed a novel responsive antibacterial system that precisely targets and eliminates antibiotic-resistant bacteria. The system releases antibacterial agents only when triggered by specific bacterial nucleic acids, ensuring targeted drug delivery and enhanced efficacy.

Keywords:
Escherichia coliDNA tetrahedral nanostructuresantimicrobial therapyextracellular nucleic acidsingle-base recognition

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Antimicrobial Research

Background:

  • Antibiotic resistance poses a significant global health threat, necessitating innovative treatment strategies.
  • Current antibacterial approaches often lack specificity, leading to off-target effects and reduced efficacy.
  • There is an urgent need for precision-targeted therapies to combat resistant bacterial infections.

Purpose of the Study:

  • To design and validate a novel responsive antibacterial system for precise bacterial eradication.
  • To develop a system where drug release is specifically triggered by extracellular nucleic acids.
  • To ensure highly specific and quantitative drug release for targeted antibacterial action.

Main Methods:

  • Conjugation of antibacterial agents to nucleic acid probes.
  • Utilizing toehold-mediated strand displacement for single-nucleotide precision targeting.
  • Employing bacterial growth inhibition curves, inhibition zone measurements, and fluorescence staining assays for evaluation.

Main Results:

  • Demonstrated exceptional stability and selectivity of the designed antibacterial system.
  • Validated the system's efficacy in spiked environmental water samples, confirming real-world applicability.
  • Achieved precise bacterial targeting and quantitative drug release triggered by extracellular nucleic acids.

Conclusions:

  • The novel antibacterial strategy exhibits excellent stability and selectivity.
  • The system effectively targets and eliminates bacteria in simulated environmental conditions.
  • This approach offers a promising solution for combating antibiotic-resistant bacteria.