Photodynamic antifungal chemotherapy

Area of Science:

• Mycology
• Photomedicine
• Antimicrobial Therapy

Background:

• Growing resistance to conventional antifungal drugs necessitates novel treatment strategies.
• Antimicrobial photodynamic therapy (PDT) emerges as a potential alternative for treating fungal infections.
• PDT utilizes photosensitizers (PSs) to generate reactive oxygen species upon light activation, leading to microbial cell death.

Purpose of the Study:

• To review current research on the antifungal applications of PDT, with a focus on yeast infections.
• To highlight the efficacy and benefits of PDT as a treatment modality for fungal infections.
• To raise awareness about PDT's potential impact on the future treatment of mycoses.

Main Methods:

• Review of published studies on antifungal PDT.
• Focus on studies involving dermatophytes and yeasts.
• Analysis of photosensitizer classes including phenothiazine dyes, porphyrins, phthalocyanines, and aminolevulinic acid.

Main Results:

• PDT demonstrates effective sensitization of dermatophytes and yeasts both in vitro and in vivo.
• Photosensitizers exhibit high selectivity, targeting fungi at lower doses than host cells.
• Investigated PSs show no genotoxic or mutagenic activity, and resistance development is rarely reported.

Conclusions:

• Antimicrobial PDT is a viable and safe alternative for treating fungal infections, particularly those caused by yeasts.
• The selectivity and low risk of resistance make PDT a promising therapeutic option.
• Further research and clinical application of PDT could significantly impact the management of fungal diseases.