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Updated: May 19, 2026

Inactivation of Pathogens via Visible-Light Photolysis of Riboflavin-5′-Phosphate
Published on: April 6, 2022
Photodynamic inactivation of mammalian viruses and bacteriophages
Liliana Costa1, Maria Amparo F Faustino, Maria Graça P M S Neves
1Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal. lcosta@ua.pt
Abstract:
Photodynamic inactivation (PDI) has been used to inactivate microorganisms through the use of photosensitizers. The inactivation of mammalian viruses and bacteriophages by photosensitization has been applied with success since the first decades of the last century. Due to the fact that mammalian viruses are known to pose a threat to public health and that bacteriophages are frequently used as models of mammalian viruses, it is important to know and understand the mechanisms and photodynamic procedures involved in their photoinactivation. The aim of this review is to (i) summarize the main approaches developed until now for the photodynamic inactivation of bacteriophages and mammalian viruses and, (ii) discuss and compare the present state of the art of mammalian viruses PDI with phage photoinactivation, with special focus on the most relevant mechanisms, molecular targets and factors affecting the viral inactivation process.
Insights
Photodynamic inactivation (PDI) effectively inactivates viruses using photosensitizers. This review compares PDI methods for mammalian viruses and bacteriophages, focusing on mechanisms and targets.
Area of Science:
- Microbiology
- Photochemistry
- Virology
Background:
- Photodynamic inactivation (PDI) utilizes photosensitizers to eliminate microorganisms.
- The application of photosensitization for inactivating mammalian viruses and bacteriophages dates back to the early 20th century.
- Understanding PDI is crucial due to the public health threat posed by mammalian viruses and the use of bacteriophages as model organisms.
Purpose of the Study:
- To review current photodynamic inactivation approaches for bacteriophages and mammalian viruses.
- To compare the state-of-the-art PDI for mammalian viruses with phage photoinactivation.
- To highlight key mechanisms, molecular targets, and factors influencing viral inactivation.
Main Methods:
- Literature review of photodynamic inactivation studies.
- Comparative analysis of PDI techniques for viruses and bacteriophages.
- Focus on mechanisms, molecular targets, and influencing factors.
Main Results:
- Summary of various PDI strategies for viral inactivation.
- Comparison of PDI efficacy and mechanisms between mammalian viruses and bacteriophages.
- Identification of critical factors affecting the photodynamic inactivation process.
Conclusions:
- Photodynamic inactivation is a viable method for controlling viral pathogens.
- Bacteriophages serve as valuable models for understanding mammalian virus PDI.
- Further research into PDI mechanisms can optimize viral inactivation strategies.
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