1202401-59-9

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. ).

PC-046 是一种多靶点抑制剂，针对酪氨酸受体激酶 B (TrkB)、IRAK-4 和 Pim-1，IC50 分别为 13.4 μM、15.4 μM 和 19.1 μM。PC-046 对胰腺癌细胞 BxPC3 具有细胞毒性，IC50 在 7.5-130 nM 之间。PC-046 诱导 BxPC3 细胞凋亡 (apoptosis)，并在 G2/M 期阻滞细胞周期。PC-046 具有抗肿瘤作用，在小鼠体内具有良好的药代动力学特征。