2. Academic Validation
  3. CYT997: a novel orally active tubulin polymerization inhibitor with potent cytotoxic and vascular disrupting activity in vitro and in vivo

CYT997: a novel orally active tubulin polymerization inhibitor with potent cytotoxic and vascular disrupting activity in vitro and in vivo

  • Mol Cancer Ther. 2009 Nov;8(11):3036-45. doi: 10.1158/1535-7163.MCT-09-0076.
Christopher J Burns 1,  Emmanuelle Fantino,  Ian D Phillips,  Stephen Su,  Michael F Harte,  Patricia E Bukczynska,  Mark Frazzetto,  Max Joffe,  Irma Kruszelnicki,  Bing Wang,  Yue Wang,  Neil Wilson,  Rodney J Dilley,  Soo S Wan,  Susan A Charman,  David M Shackleford,  Rosa Fida,  Cathy Malcontenti-Wilson,  Andrew F Wilks
Affiliations

Affiliation

  • 1 Cytopia Research Pty Ltd, Richmond, Victoria, Australia. chris.burns@cytopia.com.au
PMID: 19887548 DOI: 10.1158/1535-7163.MCT-09-0076
Abstract

CYT997 is a wholly synthetic compound that possesses highly potent cytotoxic activity in vitro through inhibition of microtubule polymerization. CYT997 blocks the cell cycle at the G(2)-M boundary, and Western blot analysis indicates an increase in phosphorylated Bcl-2, along with increased expression of cyclin B1. Caspase-3 activation is also observed in cells treated with CYT997 along with the generation of poly(ADP-ribose) polymerase. The compound possesses favorable pharmacokinetic properties, is orally bioavailable, and is efficacious per os in a range of in vivo Cancer models, including some refractory to paclitaxel treatment. CYT997 exhibits vascular disrupting activity as measured in vitro by effects on the permeability of human umbilical vein endothelial cell monolayers, and in vivo by effects on tumor blood flow. CYT997 possesses a useful combination of pharmacologic and pharmacokinetic properties and has considerable potential as a novel Anticancer agent.

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