Selenoprotein deficiency and high levels of selenium compounds can effectively inhibit hepatocarcinogenesis in transgenic mice

Sergey V. Novoselov, Diego F. Calvisi, Vyacheslav M. Labunskyy, Valentina M. Factor, Bradley A. Carlson, Dmitri E. Fomenko, Mohamed E. Moustafa, Dolph L. Hatfield, Vadim N. Gladyshev

Research output: Contribution to journalArticle

92 Scopus citations

Abstract

The micronutrient element selenium (Se) has been shown to be effective in reducing the incidence of cancer in animal models and human clinical trials. Selenoproteins and low molecular weight Se compounds were implicated in the chemopreventive effect, but specific mechanisms are not clear. We examined the role of Se and selenoproteins in liver tumor formation in TGFα/c-Myc transgenic mice, which are characterized by disrupted redox homeostasis and develop liver cancer by 6 months of age. In these mice, both Se deficiency and high levels of Se compounds suppressed hepatocarcinogenesis. In addition, both treatments induced expression of detoxification genes, increased apoptosis and inhibited cell proliferation. Within low-to-optimal levels of dietary Se, tumor formation correlated with expression of most selenoproteins. These data suggest that changes in selenoprotein expression may either suppress or promote tumorigenesis depending on cell type and genotype. Since dietary Se may have opposing effects on cancer, it is important to identify the subjects who will benefit from Se supplementation as well as those who will not.

Original languageEnglish (US)
Pages (from-to)8003-8011
Number of pages9
JournalOncogene
Volume24
Issue number54
DOIs
StatePublished - Dec 1 2005

Keywords

  • Cancer prevention
  • Redox regulation
  • Selenium
  • Selenocysteine
  • Selenoprotein

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cancer Research

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    Novoselov, S. V., Calvisi, D. F., Labunskyy, V. M., Factor, V. M., Carlson, B. A., Fomenko, D. E., Moustafa, M. E., Hatfield, D. L., & Gladyshev, V. N. (2005). Selenoprotein deficiency and high levels of selenium compounds can effectively inhibit hepatocarcinogenesis in transgenic mice. Oncogene, 24(54), 8003-8011. https://doi.org/10.1038/sj.onc.1208940