| Hazard Information | Back Directory | [Description]
PC-046 is a potent tubulin-binding agent, which was originally identified for development based on selective activity in deleted in pancreas cancer locus 4 (DPC4/SMAD4) deficient tumors. PC-046 has growth inhibitory activity in a variety of tumor types in vitro, and efficacy in SCID mice was shown in human tumor xenografts of MV-4-11 acute myeloid leukemia, MM.1S multiple myeloma, and DU-145 prostate cancer. Pharmacokinetic studies demonstrated relatively high oral bioavailability (71 %) with distribution to both plasma and bone marrow. No myelosuppression was seen in non-tumor bearing SCID mice given a single dose just under the acute lethal dose. The COMPARE algorithm in the NCI-60 cell line panel demonstrated that PC-046 closely correlated to other known tubulin destabilizing agents (correlation coefficients ≈0.7 for vincristine and vinblastine). Mechanism of action studies showed cell cycle arrest in metaphase and inhibition of tubulin polymerization. Overall, these studies show that PC-046 is a synthetically-derived, small molecule microtubule destabilizing agent. Advantages over existing microtubule destabilizing agents include ease of synthesis, lack of MDR cross-resistance, good oral bioavailability and the lack of acute myelotoxicity. (source: Invest New Drugs. 2013 Dec;31(6):1616-25. ). | [Uses]
PC-046 is a multi-target inhibitor for tyrosine receptor kinase B (TrkB), IRAK-4 and Pim-1, with IC50 of 13.4 μM, 15.4 μM and 19.1 μM, respectively. PC-046 exhibits cytotoxicity against pancreatic cancer cell BxPC3 with IC50 of 7.5-130 nM. PC-046 induces apoptosis and arrests cell cycle at G2/M phase in BxPC3. PC-046 exhibits antitumor efficacy and exhibits good pharmacokinetic characteristics in mice[1]. | [References]
[1] Shaw AY, et al., Characterization of novel diaryl oxazole-based compounds as potential agents to treat pancreatic cancer. J Pharmacol Exp Ther. 2009 Nov;331(2):636-47. DOI:10.1124/jpet.109.156406 |
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