Iron Release Profile of Silica-Modified Zero-Valent Iron NPs and Their Implication in Cancer Therapy.

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ID: 39273
2019
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Abstract
To evaluate the iron ion release profile of zero-valent iron (ZVI)-based nanoparticles (NPs) and their relationship with lysosomes in cancer cells, silica and mesoporous silica-coated ZVI NPs (denoted as ZVI@SiO and ZVI@mSiO) were synthesized and characterized for the following study of cytotoxicity, intracellular iron ion release, and their underlying mechanisms. ZVI@mSiO NPs showed higher cytotoxicity than ZVI@SiO NPs in the OEC-M1 oral cancer cell line. In addition, internalized ZVI@mSiO NPs deformed into hollow and void structures within the cells after a 24-h treatment, but ZVI@SiO NPs remained intact after internalization. The intracellular iron ion release profile was also accordant with the structural deformation of ZVI@mSiO NPs. Burst iron ion release occurred in ZVI@mSiO-treated cells within an hour with increased lysosome membrane permeability, which induced massive reactive oxygen species generation followed by necrotic and apoptotic cell death. Furthermore, inhibition of endosome-lysosome system acidification successfully compromised burst iron ion release, thereby reversing the cell fate. An in vivo test also showed a promising anticancer effect of ZVI@mSiO NPs without significant weight loss. In conclusion, we demonstrated the anticancer property of ZVI@mSiO NPs as well as the iron ion release profile in time course within cells, which is highly associated with the surface coating of ZVI NPs and lysosomal acidification.
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yang2019ironinternational Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Yang, Li-Xing;Wu, Ya-Na;Wang, Pei-Wen;Su, Wu-Chou;Shieh, Dar-Bin;
Journal International journal of molecular sciences
Year 2019
DOI
E4336
URL
Keywords Keywords not found

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