Abstract
In this manuscript, a photosensitive anti-cancer drug, hypocrellin A (HA), and TiO2 nanoparticles were co-loaded on the surface of graphene oxide (GO) as a photosensitive drug delivery system. In vitro studies have demonstrated the active uptake of the system into the mitochondrial of tumor cells. Such system has mutual sensitization mechanism to greatly improve the reactive oxygen species (ROSs) generation ability of the complex by visible light irradiation and, thereby, the strong photodynamic therapy (PDT) efficacy. Furthermore, during such PDT process, GO can be destroyed by the ROSs, which would helpful for the metabolism of this drug delivery system.
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