Selenium and the thioredoxin redox system: Effects on cell growth and death

Garth Powis, John R. Gasdaska, Pamela Y. Gasdaska, Margareta Berggren, D. Lynn Kirkpatrick, Lars Engman, Ian A. Cotgreave, Miguel Angulo, Amanda F Baker

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

Thioredoxin is a redox protein found overexpressed in some human tumors. Thioredoxin is secreted by tumor cells and enhances the sensitivity of the cancer cells to other growth factors. Redox activity is essential for stimulation of cell growth by thioredoxin. Cells transfected with thioredoxin cDNA show increased tumor growth and decreased apoptosis in vivo and decreased sensitivity to apoptosis induced by a variety of agents both in vitro and in vivo. Cells transfected with a redox-inactive mutant thioredoxin show inhibited tumor growth in vivo. Dietary selenium has been shown to prevent some forms of human cancer. Selenocysteine is an essential component of thioredoxin reductase, the flavoenzyme that is responsible for the reduction of thioredoxin. Selenium added to the culture medium increases thioredoxin reductase activity due to an increase in thioredoxin reductase protein but mostly due to an increase in the specific activity of the enzyme. Some diaryl chalcogenide (selenium and tellurium) compounds have been studied as inhibitors of thioredoxin reductase. The most active were diaryl tellurium compounds, which were noncompetitive inhibitors of thioredoxin reductase with K-, values of 2-10 /M. Several of the compounds inhibited cancer cell colony formation in vitro with IC50s as low as 2 jiM.

Original languageEnglish (US)
Pages (from-to)303-312
Number of pages10
JournalOncology Research
Volume9
Issue number6-7
StatePublished - 1997

Fingerprint

Thioredoxins
Selenium
Thioredoxin-Disulfide Reductase
Oxidation-Reduction
Cell Death
Growth
Neoplasms
Tellurium
Selenium Compounds
Selenocysteine
Apoptosis
Culture Media
Intercellular Signaling Peptides and Proteins
Proteins
Complementary DNA
Enzymes

Keywords

  • Apoptosis
  • Selenium
  • Thioredoxin
  • Thioredoxin reductase

ASJC Scopus subject areas

  • Cancer Research

Cite this

Powis, G., Gasdaska, J. R., Gasdaska, P. Y., Berggren, M., Lynn Kirkpatrick, D., Engman, L., ... Baker, A. F. (1997). Selenium and the thioredoxin redox system: Effects on cell growth and death. Oncology Research, 9(6-7), 303-312.

Selenium and the thioredoxin redox system : Effects on cell growth and death. / Powis, Garth; Gasdaska, John R.; Gasdaska, Pamela Y.; Berggren, Margareta; Lynn Kirkpatrick, D.; Engman, Lars; Cotgreave, Ian A.; Angulo, Miguel; Baker, Amanda F.

In: Oncology Research, Vol. 9, No. 6-7, 1997, p. 303-312.

Research output: Contribution to journalArticle

Powis, G, Gasdaska, JR, Gasdaska, PY, Berggren, M, Lynn Kirkpatrick, D, Engman, L, Cotgreave, IA, Angulo, M & Baker, AF 1997, 'Selenium and the thioredoxin redox system: Effects on cell growth and death', Oncology Research, vol. 9, no. 6-7, pp. 303-312.
Powis G, Gasdaska JR, Gasdaska PY, Berggren M, Lynn Kirkpatrick D, Engman L et al. Selenium and the thioredoxin redox system: Effects on cell growth and death. Oncology Research. 1997;9(6-7):303-312.
Powis, Garth ; Gasdaska, John R. ; Gasdaska, Pamela Y. ; Berggren, Margareta ; Lynn Kirkpatrick, D. ; Engman, Lars ; Cotgreave, Ian A. ; Angulo, Miguel ; Baker, Amanda F. / Selenium and the thioredoxin redox system : Effects on cell growth and death. In: Oncology Research. 1997 ; Vol. 9, No. 6-7. pp. 303-312.
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