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Thioredoxin reductase and cancer cell growth inhibition by organotellurium compounds that could be selectively incorporated into tumor cells.

Abstract
The thioredoxins are small ubiquitous redox proteins with the conserved redox catalytic sequence-Trp-Cys-Gly-Pro-Cys-Lys, where the Cys residues undergo reversible NADPH dependent reduction by selenocysteine containing flavoprotein thioredoxin reductases. Thioredoxin expression is increased in several human primary cancers including lung, colon, cervix, liver, pancreatic, colorectal and squamous cell cancer. The thioredoxin/thioredoxin reductase pathway therefore provides an attractive target for cancer drug development. Organotellurium steroid, lipid, amino acid, nucleic base, and polyamine inhibitors were synthesized on the basis that they might be selectively or differentially incorporated into tumor cells. Some of the newly prepared classes of tellurium-based inhibitors (lipid-like compounds 3b and 3e, amino acid derivative 5b, nucleic base derivative 8b, and polyamine derivatives 14a and 14b) inhibited TrxR/Trx and cancer cell growth in culture with IC(50) values in the low micromolar range.
AuthorsLars Engman, Nawaf Al-Maharik, Michael McNaughton, Anne Birmingham, Garth Powis
JournalBioorganic & medicinal chemistry (Bioorg Med Chem) Vol. 11 Issue 23 Pg. 5091-100 (Nov 17 2003) ISSN: 0968-0896 [Print] England
PMID14604673 (Publication Type: Journal Article, Research Support, U.S. Gov't, P.H.S.)
Chemical References
  • Thioredoxin-Disulfide Reductase
  • Tellurium
Topics
  • Cell Division (drug effects)
  • Humans
  • Magnetic Resonance Spectroscopy
  • Neoplasms (metabolism, pathology)
  • Tellurium (metabolism, pharmacology)
  • Thioredoxin-Disulfide Reductase (metabolism)

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