Repurposing the Clinically Efficacious Antifungal Agent Itraconazole as an Anticancer Chemotherapeutic

J Med Chem. 2016 Apr 28;59(8):3635-49. doi: 10.1021/acs.jmedchem.5b01718. Epub 2016 Apr 6.

Abstract

Itraconazole (ITZ) is an FDA-approved member of the triazole class of antifungal agents. Two recent drug repurposing screens identified ITZ as a promising anticancer chemotherapeutic that inhibits both the angiogenesis and hedgehog (Hh) signaling pathways. We have synthesized and evaluated first- and second-generation ITZ analogues for their anti-Hh and antiangiogenic activities to probe more fully the structural requirements for these anticancer properties. Our overall results suggest that the triazole functionality is required for ITZ-mediated inhibition of angiogenesis but that it is not essential for inhibition of Hh signaling. The synthesis and evaluation of stereochemically defined des-triazole ITZ analogues also provides key information as to the optimal configuration around the dioxolane ring of the ITZ scaffold. Finally, the results from our studies suggest that two distinct cellular mechanisms of action govern the anticancer properties of the ITZ scaffold.

MeSH terms

  • Animals
  • Antifungal Agents / therapeutic use*
  • Antineoplastic Agents / therapeutic use*
  • Cell Line
  • Inhibitory Concentration 50
  • Itraconazole / therapeutic use*
  • Mice
  • Mice, Inbred C3H
  • RNA, Messenger / genetics
  • Zinc Finger Protein GLI1 / genetics

Substances

  • Antifungal Agents
  • Antineoplastic Agents
  • Gli1 protein, mouse
  • RNA, Messenger
  • Zinc Finger Protein GLI1
  • Itraconazole