Molecular and Cellular Biochemistry

, Volume 255, Issue 1, pp 33–45

Arsenite induces HIF-1α and VEGF through PI3K, Akt and reactive oxygen species in DU145 human prostate carcinoma cells

Authors

  • Ning Gao
    • Mary Babb Randolph Cancer Center and Department of Microbiology, Immunology and Cell BiologyWest Virginia University
  • Liqin Shen
    • Institute of BiotechnologySuzhou University
  • Zhuo Zhang
    • Pathology and Physiology Research BranchNational Institute for Occupational Safety and Health
  • Stephen S. Leonard
    • Pathology and Physiology Research BranchNational Institute for Occupational Safety and Health
  • Hengjun He
    • Institute of BiotechnologySuzhou University
  • Xue-Guang Zhang
    • Institute of BiotechnologySuzhou University
  • Xianglin Shi
    • Pathology and Physiology Research BranchNational Institute for Occupational Safety and Health
  • Bing-Hua Jiang
    • Mary Babb Randolph Cancer Center and Department of Microbiology, Immunology and Cell BiologyWest Virginia University
Article

DOI: 10.1023/B:MCBI.0000007259.65742.16

Cite this article as:
Gao, N., Shen, L., Zhang, Z. et al. Mol Cell Biochem (2004) 255: 33. doi:10.1023/B:MCBI.0000007259.65742.16

Abstract

Arsenite is widely distributed environmental toxicant in water, food and air. It is a known human carcinogen, which is strongly associated with human cancers originated from liver, nasal cavity, lung, skin, bladder, kidney, and prostate. In this study, we investigated whether arsenite induces expression of hypoxia-inducible factor 1 (HIF-1). HIFhyphen;1 is a heterodimeric basic helix-loop-helix transcription factor, composed of HIF-1α and HIF-1β/ARNT subunits; and is involved in tumor growth and angiogenesis. Here we demonstrate that arsenite induces the expression of HIF-1α but not HIF-1β subunit in DU145 human prostate carcinoma cells. Arsenite also increases the expression of VEGF through the induction of HIF-1. We also found that arsenite activates PI3K and Akt that are required for arsenite-induced expression of HIF-1α and VEGF. The induction of HIF-1 and VEGF by arsenite can not be inhibited by MAP kinase inhibitors. Arsenite causes production of reactive oxygen species (ROS). The major species of ROS required for the induction of HIF-1 and VEGF is H2O2. These data indicate that the arsenite-induced activation of PI3K/Akt signaling and the expression of HIF-1 and VEGF through the generation of ROS could be an important mechanism in the arsenite-induced carcinogenesis.

hypoxia-inducible factor 1 (HIF-1)vascular endothelial growth factor (VEGF)reactive oxygen species (ROS)phosphatidylinositol 3-kinase (PI3K)Aktmitogen-activated protein kinase (MAPK)MAP kinase kinase (MEK)
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© Kluwer Academic Publishers 2004