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Title: Cytotoxicity and genotoxicity caused by yttrium oxide nanoparticles in HEK293 cells

Journal Article · · International Journal of Nanomedicine
DOI:https://doi.org/10.2147/ijn.s52625· OSTI ID:1627996
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2]
  1. Marshall University, Huntington, WV (United States)
  2. Michigan Technological University, Houghton, MI (United States)

The increased use of engineered nanoparticles (NPs) has caused new concerns about the potential exposure to biological systems and the potential risk that these materials may pose on human health. Here, we examined the effects of exposure to different concentrations (0–50 µg/mL) and incubation times (10 hours, 24 hours, or 48 hours) of yttrium oxide (Y2 O3 ) NPs on human embryonic kidney (HEK293) cells. Changes in cellular morphology, cell viability, cell membrane integrity, reactive oxygen species levels, mitochondrial membrane potential, cell death (apoptosis and necrosis), and the DNA damage after NP exposure were compared to the effects seen following incubation with paraquat, a known toxicant. The 24-hour inhibitory concentration 50 (IC50) of Y2 O3 NPs (41±5 nm in size) in the HEK293 cells was found to be 108 µg/mL. Incubation with Y2 O3 NPs (12.25–50 µg/mL) increased the ratio of Bax/Bcl-2, caspase-3 expression and promoted apoptotic- and necrotic mediated cell death in both a concentration and a time-dependent manner. Decreases in cell survivability were associated with elevations in cellular reactive oxygen species levels, increased mitochondrial membrane permeability, and evidence of DNA damage, which were consistent with the possibility that mitochondria impairment may play an important role in the cytotoxic response. These data demonstrate that the Y2 O3 NP exposure is associated with increased cellular apoptosis and necrosis in cultured HEK293 cells.

Research Organization:
Marshall Univ., Huntington, WV (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
PS02-09ER-01
OSTI ID:
1627996
Journal Information:
International Journal of Nanomedicine, Vol. 9; ISSN 1178-2013
Publisher:
Dove Medical PressCopyright Statement
Country of Publication:
United States
Language:
English

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