title: Photodynamic anticancer activities of water-soluble C(60) derivatives and their biological consequences in a HeLa cell line.
abstract: Photodynamic therapy is an emerging, externally activatable, treatment modality for various diseases, especially for cancer therapy. The photodynamic activities of tumor targeting water-soluble C(60) derivatives (WSFD) were evaluated on HeLa cells. To overcome the poor solubility, biocompatibility and selectivity of C(60), we modified C(60) with l-phenylalanine, folic acid and l-arginine. Consistent with their photodynamic abilities, WSFD generated the reactive oxygen species after irradiation both in water and in vitro. No dark cytotoxicity was observed using 5μg/mL WSFD during long incubation time. Furthermore, the uptake of WSFD into HeLa cells was much more than normal cells, which indicated the WSFD had selectivity to tumor cells. Investigation of the possible photodynamic activities of WSFD demonstrated that they expressed photokilling activities by raising the level of (1)O(2)/O(2)(-) under visible light irradiation. In parallel, following exposure of cells to WSFD and irradiation, a marked decrease in mitochondrial membrane potential, cell viability, activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px), as well as increased malondialdehyde (MDA) production were observed. Moreover, WSFD caused significant elevation in caspase-3 activity, and induced apoptotic death. Experiments demonstrated that both chemical properties, such as the chemical structure of adduct and addend numbers, and physical properties, such as degree of aggregation, influenced the ROS-generation abilities, cellular uptake and photodynamic activities of WSFD. The results suggest that WSFD have the potential application in cancer cell inactivation by photodynamic therapy.
authors: School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, China. huzhen@hit.edu.cn
authors: Zhen
authors: Z
authors: Hu
authors: Chunhua
authors: C
authors: Zhang
authors: Yudong
authors: Y
authors: Huang
authors: Shaofan
authors: S
authors: Sun
authors: Wenchao
authors: W
authors: Guan
authors: Yuhuan
authors: Y
authors: Yao
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects; D001120:Arginine / Q000737:chemistry; D053148:Caspase 3 / Q000378:metabolism; D002374:Catalase / Q000378:metabolism; D002470:Cell Survival / Q000187:drug effects; D005492:Folic Acid / Q000737:chemistry; D037741:Fullerenes / Q000494:pharmacology*; D005979:Glutathione Peroxidase / Q000378:metabolism; D006367:HeLa Cells; D006801:Humans; D008027:Light; D008315:Malondialdehyde / Q000378:metabolism; D053078:Membrane Potential, Mitochondrial / Q000187:drug effects; D009369:Neoplasms / Q000473:pathology*; D010649:Phenylalanine / Q000737:chemistry; D010778:Photochemotherapy; D017382:Reactive Oxygen Species / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism; D014867:Water / Q000737:chemistry
chemical_list: D000970:Antineoplastic Agents; D037741:Fullerenes; D017382:Reactive Oxygen Species; D014867:Water; D010649:Phenylalanine; D008315:Malondialdehyde; D005492:Folic Acid; D001120:Arginine; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D053148:Caspase 3; C069837:fullerene C60