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- W2140313746 abstract "Recent advances in nanomedicine provide promising alternatives for cancer treatment that may improve the survival of patients with metastatic disease. The goal of the present study was to evaluate graphene oxide (GO) as a potential anti-metastatic agent. For this purpose, GO was modified with polyethylene glycol (PEG) to form PEG-modified GO (PEG-GO), which improves its aqueous stability and biocompatibility. We show here that PEG-GO exhibited no apparent effects on the viability of breast cancer cells (MDA-MB-231, MDA-MB-436, and SK-BR-3) or non-cancerous cells (MCF-10A), but inhibited cancer cell migration in vitro and in vivo. Analysis of cellular energy metabolism revealed that PEG-GO significantly impaired mitochondrial oxidative phosphorylation (OXPHOS) in breast cancer cells; however, PEG-GO showed no effect on OXPHOS in non-cancerous cells. To explore the underlying mechanisms, a SILAC (Stable Isotope Labeling by Amino acids in Cell culture) labeling strategy was used to quantify protein expression in PEG-GO-exposed breast cancer versus non-cancerous cells. The results indicated that PEG-GO selectively down-regulated PGC-1α in breast cancer cells and thus modified the expression of diverse energy generation-related proteins, which accounts for the inhibition of OXPHOS. The inhibition of OXPHOS by PEG-GO significantly reduced ATP production and impaired assembly of the F-actin cytoskeleton in breast cancer cells, which is required for the migratory and invasive phenotype of cancer cells. Taken together, these effects of PEG-GO on cancer cell metastasis may allow the development of a new approach to treat metastatic breast cancer." @default.
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- W2140313746 date "2014-12-01" @default.
- W2140313746 modified "2023-10-15" @default.
- W2140313746 title "Energy metabolism analysis reveals the mechanism of inhibition of breast cancer cell metastasis by PEG-modified graphene oxide nanosheets" @default.
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- W2140313746 doi "https://doi.org/10.1016/j.biomaterials.2014.08.033" @default.
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