4.5 Article

A Direct Comparison of the Anticancer Activities of Digitoxin MeON-Neoglycosides and O-Glycosides

Journal

ACS MEDICINAL CHEMISTRY LETTERS
Volume 1, Issue 7, Pages 326-330

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ml1000933

Keywords

Apoptosis; caspase; digitoxin; cancer; cardiac glycoside

Funding

  1. Camille and Henry Dreyfus Foundation
  2. Research Corporation
  3. MJ Murdock Charitable Trust
  4. Seattle University
  5. NIH [GM088839, GM090259]
  6. NSF [CHE-0749451]
  7. Division Of Chemistry
  8. Direct For Mathematical & Physical Scien [1114891] Funding Source: National Science Foundation

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Digitoxin is a cardiac glycoside currently being investigated for potential use in oncology; however, an investigation of anticancer activity as a function, of oligosaccharide chain length has not yet been performed. We generated mono-, di-, and tri-O-digitoxoside derivatives, of digitoxin and compared their activities to the corresponding MeON-neoglycosides. Both classes of cardenolide derivatives display comparable oligosaccharide chain length-dependent cytotoxicity toward human cancer cell lines. Further investigation revealed that both classes of compounds induce caspase-9-mediated apoptosis in non-small cell lung cancer cells (NCI-H460). Because O-glycosides and MeON-neoglycosides share a similar mode of action, the convenience of MeON-neoglycosylation could be exploited in future SAR work to rapidly survey large numbers of carbohydrates to prioritize selected O-glycoside candidates for traditional synthesis.

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