Figure 7

Changes of SW620 colorectal cancer cells under transmission electron microscope after PDT. (A) Normal control group (×20000); (B) X-ray irradiation group (×20000); (C) Cu-Cy (50 mg/L) (×20000); (D) Cu-Cy-PDT (50 mg/L) (×20000). The arrow indicates the typical appearance of autophagosomes.