Revisiting Current Photoactive Materials for Antimicrobial Photodynamic Therapy

Area of Science:

• Microbiology
• Photochemistry
• Materials Science

Background:

• Antimicrobial resistance is a growing global health threat, necessitating new strategies beyond conventional antimicrobials.
• Microbial infections, including those in biofilms, require effective inactivation methods in diverse settings.
• Photodynamic inactivation (PDI) emerges as a promising alternative, effective against a wide range of microorganisms, including resistant strains.

Purpose of the Study:

• To review recent advancements in photosensitizers and supports for effective photodynamic inactivation.
• To explore the chemistry and design strategies for creating photoactive materials.
• To highlight biological challenges and potential applications of PDI formulations.

Main Methods:

• Review of recent scientific literature on photosensitizers and immobilization supports for PDI.
• Analysis of chemical synthesis and design principles for photoactive materials.
• Evaluation of biological assessments and application-specific challenges of PDI formulations.

Main Results:

• Development of diverse photosensitizers and their immobilization on various supports for enhanced PDI efficacy.
• Illustrative examples of design strategies for creating effective photoactive materials.
• Identification of biological challenges associated with different PDI formulations.

Conclusions:

• Photodynamic inactivation is a viable strategy for combating microbial infections and overcoming antimicrobial resistance.
• Immobilization of photosensitizers on supports expands PDI applications to disinfection of blood, water, and surfaces.
• Further research into photoactive material design and biological validation is encouraged to advance PDI technology.