E-GEOD-8865 - Transcription profiling of human hepatoma cell line HepG2 following exposures of three heavy metals arsenic, cadmium and nickel and three carcinogens N-dimethylnitrosoamine (DMN), 12-O-tetradecanoylphorbol-13-acetate (TPA) and tetrachloroethylene (TCE)

Status
Submitted on 24 August 2007, released on 16 June 2008, last updated on 2 May 2014
Organism
Homo sapiens
Samples (33)
Array (1)
Protocols (18)
Description
From the result of comparative the gene expression analyses of human hepatoma cell line, HepG2 following exposures of three heavy metals; arsenic, cadmium and nickel and three carcinogens; N-dimethylnitrosoamine (DMN), 12-O-tetradecanoylphorbol-13-acetate (TPA) and tetrachloroethylene (TCE), 31-55% of the genes altered by As, Cd and Ni exposure were overlapped with those by three model carcinogen exposures in our experiments. In particular, three heavy metals shared certain characteristics with TPA and TCE in remarkable up-regulations of the genes associated with progression of cell cycle, which might play a central role in heavy metal carcinogenesis. In addition, this characteristic of gene expressions alteration was counteracted by intracellular accumulation of vitamine C in As-exposed cells but not in Cd- and Ni-exposed cells. These results suggest that the cell proliferative responses are caused by reactive oxygen species mainly in As exposure, while other mechanisms would be involved in these responses in Cd and Ni exposures. Experiment Overall Design: In this study, we examined the gene expression alteration in human hepatoma cell line, HepG2 following exposures of three heavy metals; arsenic, cadmium and nickel and three carcinogens; N-dimethylnitrosoamine (DMN), 12-O-tetradecanoylphorbol-13-acetate (TPA) and tetrachloroethylene (TCE) using DNA microarray with 8795 human genes. Furthermore, we also performed the DNA microarray analyses for the heavy metal exposed-cells that were loaded with vitamine C beforehand to examine the effects of antioxidant molecule to heavy metal exposures.
Experiment types
transcription profiling by array, unknown experiment type
Contact
MIAME
PlatformsProtocolsVariablesProcessedRaw
Files
Investigation descriptionE-GEOD-8865.idf.txt
Sample and data relationshipE-GEOD-8865.sdrf.txt
Raw data (1)E-GEOD-8865.raw.1.zip
Processed data (1)E-GEOD-8865.processed.1.zip
Array designA-AFFY-41.adf.txt
R ExpressionSetE-GEOD-8865.eSet.r
Links