Advances in the Study of Cerium Oxide Nanoparticles: New Insights into Antiamyloidogenic Activity

Katarina Siposova, Veronika Huntosova, Yulia Shlapa, Lenka Lenkavska, Mariana MacAjova, Anatolii Belous, Andrey Musatov

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

There seems to be general agreement that oxidative stress is involved in many pathological conditions including Parkinson's, Alzheimer's, and other neurodegenerative diseases, and overall aging. Cerium oxide nanoparticles, also known as nanoceria (CeO2-NPs), have shown promise as catalytic antioxidants, based on their ability to switch between Ce3+ and Ce4+ valence states. In the present work we have synthesized and characterized CeO2-NPs, examined the effect of CeO2-NPs on amyloidogenesis of insulin, and analyzed the impact of CeO2-NPs on oxidative stress and biocompatibility in vitro in three types of invasive cancer cells, and in vivo in the preclinical model of the chorioallantoic membrane (CAM) of quail embryos. The different experimental techniques revealed a high stability and homogeneity of the "naked" CeO2-NPs synthesized by precipitation from a reversal microemulsion. The CeO2-NPs were 5-6 nm in diameter (TEM) and monodispersed and have a ζ +46.9 mV ζ potential in Milli-Q water. We demonstrated for the first time that CeO2-NPs affect insulin fibrillation in a dose-dependent manner. The inhibiting, IC50, and disassembling, DC50, concentrations were calculated to be ?100 ± 3.5 and ?200 ± 5.5 μg/mL, respectively. Furthermore, CeO2-NPs demonstrated reliable biocompatibility and sufficient uptake by glioma and breast cancer cells. The presence of a high concentration of CeO2-NPs within the cells resulted only in local changes in metabolic activity and generation of oxidative stress at a low level. Moreover, high biocompatibility with CeO2-NPs was shown in vivo in the CAM.

Original languageEnglish (US)
Pages (from-to)1884-1896
Number of pages13
JournalACS Applied Bio Materials
Volume2
Issue number5
DOIs
StatePublished - May 20 2019
Externally publishedYes

Keywords

  • biocompatibility
  • cerium oxide nanoparticles
  • insulin amyloidogenesis
  • oxidative stress
  • synthesis

ASJC Scopus subject areas

  • Biomaterials
  • Chemistry(all)
  • Biomedical Engineering
  • Biochemistry, medical

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