According to the in vivo study by Schumann et al. (2015) [25] a single dose of combination therapy with the photosensitiser phthalocyanine (Pc) and siRNA as a DJ-1 gene suppressor led to a complete eradication of ovarian tumours (grown from A2780/AD cancer cells) without any evidence of recurrence in mice, whereas PDT only treated tumours began to regrow 16 days after treatment. The gene discussed is PARK7; the disease is ovarian neoplasm.