Application Device for Inducing Cytotoxicity to Tumor Cells Via Coated Cerium Oxide Nanoparticles

摘要

Differential surface-charge-dependent localization of nanoceria in normal cells and cancer cells plays a critical role in the toxicity profile of a nanoceria particle. Engineered surface-coated cerium oxide nanoparticles with different surface charges that are positive, negative and neutral provide therapeutic results for normal and cancer cell lines. Results show that nanoceria with a positive or neutral charge enters most of the cell lines studied, while nanoceria with a negative charge internalizes mostly in the cancer cell lines. Moreover, upon entry into the cells, nanoceria is localized to different cell compartments (e.g. cytoplasm and lysosomes) depending on the nanoparticle surface charge. The internalization and subcellular localization of nanoceria plays a key role in the nanoparticle cytotoxicity profile, exhibiting significant toxicity when they localize in the lysosomes of the cancer cell lines. In contrast, minimal toxicity is observed when they localize into the cytoplasm or do not enter the cells.

主权项

1. A kit for treating cancer, the kit comprising
a quantity of cerium oxide nanoparticles coated with a polymer providing a surface charge, and at least one medical application device, wherein said medical application device and said nanoparticles are packaged together.