Comparison of HepG2 and HepaRG by whole-genome gene expression analysis for the purpose of chemical hazard identification.

D.G. Jennen, C. Christina Magkoufopoulou, H.B. Ketelslegers, M.H. van Herwijnen, J.C. Kleinjans, J.H. van Delft

    Research output: Contribution to journalArticleAcademicpeer-review

    Abstract

    Direct comparison of the hepatoma cell lines HepG2 and HepaRG has previously been performed by only evaluating a limited set of genes or proteins. In this study, we examined the whole genome gene expression of both cell lines before and after exposure to the genotoxic (GTX) carcinogens aflatoxin B1 and benzo[a]pyrene and the non-genotoxic (NGTX) carcinogens cyclosporin A, 17beta-estradiol and 2,3,7,8-tetrachlorodibenzo-para-dioxin for 12 and 48 h. Before exposure, this analysis revealed an extensive network of genes and pathways which were regulated differentially for each cell line. The comparison of the basal gene expression between HepG2, HepaRG, primary human hepatocytes (PHH) and liver clearly showed that HepaRG resembles PHH and liver the most. After exposure to the GTX and NGTX carcinogens, for both cell lines, common pathways were found that are important in carcinogenesis, e.g. cell cycle regulation and apoptosis. However, also clear differences between exposed HepG2 and HepaRG were observed and these are related to common metabolic processes, immune response and transcription processes. Furthermore, HepG2 performs better in discriminating between GTX and NGTX carcinogens. In conclusion, these results have shown that HepaRG is a more suited in vitro liver model for biological interpretations of the effects of exposure to chemicals, whereas HepG2 is a more promising in vitro liver model for classification studies using the toxicogenomics approach. Although, it should be noted that only five carcinogens were used in this study.
    Original languageEnglish
    Pages (from-to)66-79
    Number of pages14
    JournalToxicological Sciences
    Volume115
    Issue number1
    DOIs
    Publication statusPublished - May 2010

    Keywords

    • HepG2
    • HepaRG
    • microarray
    • comparison
    • carcinogens
    • class discrimination
    • PRIMARY HUMAN HEPATOCYTES
    • IN-VITRO MODEL
    • HUMAN HEPATOMA-CELLS
    • NONGENOTOXIC CARCINOGENS
    • CYCLOSPORINE METABOLISM
    • ENZYME LEVELS
    • CYTOCHROME-P450
    • INDUCTION
    • LINES
    • DISCRIMINATION

    Cite this