Pheophorbide a is the product of chlorophyll breakdown. It is used as a photosensitizer.
Photodynamic therapy (PDT) with several photosensitizers is a promising modality for the treatment of cancer. In this study, the therapeutic effect of PDT using the synthetic photosensitizer pheophorbide a (Pa-PDT) was examined in AT-84 murine oral squamous cell carcinoma (OSCC) cells.