| Abstract: | Biological effects of photoexcited in UV/VIS region water-soluble fullerenes C60 and synthesized C60-containing composites after its addition to cell incubation medium are studied. It is shown by EPR method, that in the presence of photoexcited C60 (10(-5) M) reactive oxygen species (ROS) are generated both in water solution and cell suspensions. ROS generation is accelerated if C60 is included into aminopropylaerosyl or antracenaliminopropylaerosyl. Photodynamic damage of Erlich ascites carcinoma cells by photoexcited C60-composites is confirmed by a decrease of cell viability, enhanced content of Schiff base fluorescent products of malonaldehyde as indicator of lipid peroxidation and the decrease in respiratory activity, estimated by MTT-test. No effects of photoexcited C60-composites were detected in thymocytes suspension. The data obtained testity to perspective utility of C60-composites for optimization of photodynamic therapy methods. |
