Nano Archive

In vitro proliferating cell models to study cytotoxicity of silica nanowires

Julien, Daniel C. and Richardson, Casey C. and II, Miles F. Beaux and McIlroy, David N. and Hill, Rodney A. (2010) In vitro proliferating cell models to study cytotoxicity of silica nanowires. Nanomedicine: Nanotechnology, Biology and Medicine, 6 (1). 84 - 92.

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Proliferating cells representing two disease models (HeLa and Panc 10.05 cells) and a more physiologically relevant cell model (3T3-L1 cells) were used to study the acute toxicologic effects of silica nanowires (NWs). Cellular responses to NW effects were determined over a 4- to 20-hour exposure time-course. Proliferation, viability, metabolic activity, and toxicologic mechanism (apoptosis vs. necrosis) data showed the following: 3 × 104 NWs per cell inhibited cell proliferation. The effect was rapid in HeLa cells, but 3T3-L1 and Panc 10.05 cells appeared to be more tolerant to NWs, effects being significant only after 20 or 16 hours, respectively. Cells of all three cell lines showed a significant reduction in cellular metabolic activity after 20 hours of treatment with NWs. Assay of NW-invoked mechanism of cell death (caspase 3/7 activity) indicated that apoptosis was minimally induced. Small but significant effects of NWs were detected in 3T3-L1 and HeLa cells after 20-hour treatment. No NW-induction of caspase 3/7 activity was detected for Panc 10.05 cells. Proliferating cells provide a sensitive model to study treatment with silica NWs. Silica NWs appeared to be well tolerated by these three cell lines at the doses tested. When effects were detected, cell necrosis and not apoptosis was the main mechanism of silica NW–induced cell death.

Item Type:Article
Uncontrolled Keywords:3T3-L1; Apoptosis; HeLa; Necrosis; Panc 10.05; Silica nanowire; Toxicity
Subjects:NanoSafety > Environment, health and safety aspects of nanotechnology
Biomedical Science > Nanomedicine
ID Code:8563
Deposited By:SPI
Deposited On:22 Apr 2010 10:57
Last Modified:22 Apr 2010 10:57

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