Tags

Type your tag names separated by a space and hit enter

Toxicogenomic responses of human liver HepG2 cells to silver nanoparticles.
J Appl Toxicol. 2015 Oct; 35(10):1160-8.JA

Abstract

The increased use of silver nanoparticles (AgNPs) in foods and cosmetics has raised public safety concerns. However, only limited knowledge exists on the effect of AgNPs on the cellular transcriptome. This study evaluated global gene expression profiles of human liver HepG2 cells exposed to 20 and 50 nm AgNPs for 4 and 24 h at 2.5 µg ml(-1) . Exposure to 20 nm AgNPs resulted in 811 altered genes after 4 h, but much less after 24 h. Exposure to 50 nm AgNPs showed minimal altered genes at both exposure times. The HepG2 cells responded to the toxic insult of AgNPs by transiently upregulating stress response genes such as metallothioneins and heat shock proteins. Functional analysis of the altered genes showed more than 20 major biological processes were affected, of which metabolism, development, cell differentiation and cell death were the most dominant categories. Several cellular pathways were also impacted by AgNP exposure, including the p53 signaling pathway and the NRF2-mediated oxidative stress response pathway, which may lead to increased oxidative stress and DNA damage in the cell and potentially result in genotoxicity and carcinogenicity. Together, these results indicate that HepG2 cells underwent a multitude of cellular processes in response to the toxic insult of AgNP exposure, and suggest that toxicogenomic characterization of human HepG2 cells could serve as an alternative model for assessing toxicities of NPs.

Authors+Show Affiliations

Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, Laurel, MD, USA.Division of Chemistry and Material Sciences, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, US Food and Drug Administration, Silver Spring, MD, USA.Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, Laurel, MD, USA.Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, Laurel, MD, USA.Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, Laurel, MD, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26014281

Citation

Sahu, Saura C., et al. "Toxicogenomic Responses of Human Liver HepG2 Cells to Silver Nanoparticles." Journal of Applied Toxicology : JAT, vol. 35, no. 10, 2015, pp. 1160-8.
Sahu SC, Zheng J, Yourick JJ, et al. Toxicogenomic responses of human liver HepG2 cells to silver nanoparticles. J Appl Toxicol. 2015;35(10):1160-8.
Sahu, S. C., Zheng, J., Yourick, J. J., Sprando, R. L., & Gao, X. (2015). Toxicogenomic responses of human liver HepG2 cells to silver nanoparticles. Journal of Applied Toxicology : JAT, 35(10), 1160-8. https://doi.org/10.1002/jat.3170
Sahu SC, et al. Toxicogenomic Responses of Human Liver HepG2 Cells to Silver Nanoparticles. J Appl Toxicol. 2015;35(10):1160-8. PubMed PMID: 26014281.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Toxicogenomic responses of human liver HepG2 cells to silver nanoparticles. AU - Sahu,Saura C, AU - Zheng,Jiwen, AU - Yourick,Jeffrey J, AU - Sprando,Robert L, AU - Gao,Xiugong, Y1 - 2015/05/26/ PY - 2015/03/12/received PY - 2015/03/27/revised PY - 2015/04/09/accepted PY - 2015/5/28/entrez PY - 2015/5/28/pubmed PY - 2016/5/18/medline KW - DNA damage KW - DNA microarray KW - HepG2 cells KW - Silver nanoparticles KW - alternative model KW - carcinogenicity KW - gene expression KW - genotoxicity KW - oxidative stress KW - toxicogenomics SP - 1160 EP - 8 JF - Journal of applied toxicology : JAT JO - J Appl Toxicol VL - 35 IS - 10 N2 - The increased use of silver nanoparticles (AgNPs) in foods and cosmetics has raised public safety concerns. However, only limited knowledge exists on the effect of AgNPs on the cellular transcriptome. This study evaluated global gene expression profiles of human liver HepG2 cells exposed to 20 and 50 nm AgNPs for 4 and 24 h at 2.5 µg ml(-1) . Exposure to 20 nm AgNPs resulted in 811 altered genes after 4 h, but much less after 24 h. Exposure to 50 nm AgNPs showed minimal altered genes at both exposure times. The HepG2 cells responded to the toxic insult of AgNPs by transiently upregulating stress response genes such as metallothioneins and heat shock proteins. Functional analysis of the altered genes showed more than 20 major biological processes were affected, of which metabolism, development, cell differentiation and cell death were the most dominant categories. Several cellular pathways were also impacted by AgNP exposure, including the p53 signaling pathway and the NRF2-mediated oxidative stress response pathway, which may lead to increased oxidative stress and DNA damage in the cell and potentially result in genotoxicity and carcinogenicity. Together, these results indicate that HepG2 cells underwent a multitude of cellular processes in response to the toxic insult of AgNP exposure, and suggest that toxicogenomic characterization of human HepG2 cells could serve as an alternative model for assessing toxicities of NPs. SN - 1099-1263 UR - https://www.unboundmedicine.com/medline/citation/26014281/Toxicogenomic_responses_of_human_liver_HepG2_cells_to_silver_nanoparticles_ L2 - https://doi.org/10.1002/jat.3170 DB - PRIME DP - Unbound Medicine ER -