An update on photodynamic therapies in the treatment of onychomycosis

Area of Science:

• Dermatology
• Photomedicine

Background:

• Onychomycosis is a prevalent fungal nail infection with increasing incidence in vulnerable populations.
• Current treatments face challenges like poor drug penetration, slow nail growth, and prolonged therapy duration, leading to frequent treatment failures and recurrences.
• The condition significantly impacts patients' quality of life, causing physical and psychological distress.

Purpose of the Study:

• To evaluate photodynamic therapy (PDT) as an alternative treatment for onychomycosis.
• To assess the efficacy and tolerability of PDT compared to standard treatments.
• To explore potential improvements for PDT to enhance its efficiency and cost-effectiveness.

Main Methods:

• Utilized photosensitizers such as methylene blue dye, methyl-aminolevulinate (MAL), and aminolevulinic acid (ALA) with approximately 630 nm light.
• Incorporated pre-treatment methods like urea and/or microabrasion to improve photosensitizer penetration.
• Administered PDT in an office-based setting.

Main Results:

• PDT treatments were generally well-tolerated, with only mild, transient side effects like pain, burning, and erythema.
• Achieved significant cure rates, particularly in patients with contraindications to oral medications or those who had failed standard therapies.
• Demonstrated potential for PDT to be an efficient and cost-effective in-office treatment.

Conclusions:

• Photodynamic therapy (PDT) presents a viable and well-tolerated alternative for managing onychomycosis.
• Further enhancements in photosensitizer delivery and reduced treatment times could increase PDT's efficiency.
• Large-scale randomized clinical trials are necessary to definitively establish the efficacy of PDT for onychomycosis.