Combined exposure to electrochemical lysis and photodynamic therapy

A combination of electrochemical lysis and photodynamic therapy were used to attain complete resorption of M-1 sarcoma in rats; both treatment modalities were used with minimum parameters. Fotolon served as the photosensitizer for photodynamic therapy. Accumulation of the sensitizer in the tumor and normal tissue was evaluated before photodynamic therapy. Complete resorption of sarcoma in 100% cases (vs. photodynamic monotherapy) was attained only by the following treatment protocol: fotolon injection 50 min before electrochemical lysis (10 min) followed by photodynamic therapy. No tumor tissue was detected in morphological sections.