RESUMEN
BACKGROUND: Photodynamic therapy which involves the use of photosensitizer molecule activated by a light source was proven very promising for the treatment of dermatological diseases, especially the resistant ones such as recalcitrant Plantar Warts (PW). OBJECTIVE: However, its efficacy is hindered by the poor permeation of the photosensitizer molecule required to initiate skin photo-induced effects. METHODS: In this manuscript, the efficiency of the nano-vesicular system (transfersomes) as a potential topical drug delivery system for the photosensitizer methylene blue (MB) was investigated following clinical Photodynamic Therapy (PDT) in patients suffering from PW. RESULTS: Results revealed that MB transfersomal gel displayed a higher complete healing percentage for the lesions compared to the free MB gel (86.67% versus 53.57%) achieved at a lower number of treatment sessions (2.2 versus 4.14). Patients reported no signs of pain or inflammation, with no recurrence of the lesions during the follow up period of 8 months. CONCLUSION: PDT using transfersomal MB is an effective and safe therapeutic modality for the treatment of PW.