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Functionalized Magnetic Nanoparticles with BODIPYs for Bioimaging and Antimicrobial Therapy Applications
Ana C Scanone1, Sofía C Santamarina1, Daniel A Heredia1
1IDAS-CONICET, Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional 36 Km 601, X5804BYA Río Cuarto, Córdoba, Argentina.
ACS Applied Bio Materials
|January 12, 2022
Summary
Researchers developed novel magnetic nanoparticles (MNPs) with boron-dipyrromethene (BODIPY) dyes for antimicrobial applications. These conjugates effectively inactivate bacteria and are recyclable, showing promise for photodynamic inactivation (PDI) therapies.
Area of Science:
- Nanotechnology
- Photochemistry
- Microbiology
Background:
- Iron oxide magnetic nanoparticles (MNPs) offer versatile platforms for biomedical applications.
- Boron-dipyrromethene (BODIPY) dyes are known for their high photosensitizing efficiency.
- Combining MNPs with BODIPY dyes presents an opportunity for novel antimicrobial strategies.
Purpose of the Study:
- To assess the antimicrobial capability and recyclability of two novel MNP-BODIPY conjugates.
- To evaluate the conjugates for bacterial inactivation and imaging applications.
- To investigate the role of heavy atoms in BODIPY for enhanced reactive oxygen species (ROS) production.
Main Methods:
- Synthesis of two MNP-BODIPY conjugates (MNP-B1 and MNP-B2) via a simple pathway.
- In vitro experiments using bacterial cell suspensions and single-bacterium imaging.
- Fluorescence microscopy to demonstrate cellular uptake, recyclability, and photodynamic inactivation (PDI) performance.
Main Results:
- Both MNP-B1 and MNP-B2 conjugates demonstrated effective inactivation of Gram-positive (methicillin-resistant *Staphylococcus aureus*) and Gram-negative (*Escherichia coli*) bacteria.
- Fluorescence microscopy confirmed cellular uptake of the conjugates.
- Sustained performance and recyclability of the conjugates over multiple cycles of PDI were observed.
Conclusions:
- MNP-BODIPY conjugates are effective tools for bacterial photoinactivation and imaging.
- This study demonstrates the first use of MNP-BODIPY conjugates for bacterial imaging and photodynamic inactivation.
- The developed conjugates show potential for advanced antimicrobial therapies and diagnostics.
