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ROS generating BODIPY loaded nanoparticles for photodynamic eradication of biofilms
Charlotte Kromer1,2, Karin Schwibbert3, Sebastian Radunz4
1Department Chemicals and Product Safety, Product Materials and Nanotechnology, German Federal Institute for Risk Assessment, Berlin, Germany.
Frontiers in Microbiology
|November 1, 2023
Summary
This study introduces a new nanoparticle-based antimicrobial photodynamic therapy to eradicate bacterial biofilms. The novel approach effectively eliminates harmful bacteria, offering a promising solution for biofilm-related infections.
Area of Science:
- Biomedical Engineering
- Photochemistry
- Microbiology
Background:
- Bacterial biofilms present significant health risks due to their resistance to conventional treatments.
- Developing effective biofilm eradication strategies is crucial for combating persistent infections.
Purpose of the Study:
- To develop a novel nanoparticle-mediated antimicrobial photodynamic therapy (aPDT) for efficient bacterial biofilm eradication.
- To investigate the efficacy of a BODIPY derivative-loaded nanoparticle system for biofilm treatment.
Main Methods:
- A biocompatible hydrophilic nanoparticle was synthesized to encapsulate a hydrophobic BODIPY derivative photosensitizer.
- The nanoparticle-photosensitizer complex was applied to biofilms of *Escherichia coli*, *Staphylococcus aureus*, and *Streptococcus mutans*.
- Illumination with visible light activated the photosensitizer, generating reactive oxygen species (ROS) for bacterial killing.
Main Results:
- The nanoparticle system successfully delivered the photosensitizer into the biofilm matrix.
- Visible light activation led to the generation of ROS, resulting in potent eradication of planktonic bacteria and biofilms.
- Effective eradication was observed against clinically relevant pathogenic bacterial species, including *E. coli*, *S. aureus*, and *S. mutans*.
Conclusions:
- Nanoparticle-mediated aPDT is a highly effective strategy for bacterial biofilm eradication.
- This approach overcomes challenges related to antimicrobial agent penetration into biofilms.
- The developed aPDT tool represents a significant advancement in treating pathogenic biofilm infections.
