1区 · 医学
Article
作者: Liang, Jun ; Halladay, Jason ; Phillips, Gail ; Dotson, Jenna ; Fields, Carter ; Cochran, Andrea G. ; Rüth, Matthias ; Zhu, Bing-Yan ; Rüger, Petra ; Kleinheinz, Tracy ; McNutt, Angela ; Rawson, Thomas E. ; Moffat, John ; Georges, Guy J. ; Limberg, Anja ; Zhou, Aihe ; Wiesmann, Christian ; Safina, Brian ; Blackwood, Elizabeth ; Drummond, Jason ; Walker, Leslie ; Burdick, Dan ; Ran, Yingqing ; Zhang, Birong ; Goller, Bernhard ; Hunsaker, Thomas ; Krell, Hans-Willi ; Ultsch, Mark ; Li, Jun ; Corson, Laura
Aurora kinase inhibitors have attracted a great deal of interest as a new class of antimitotic agents. We report a novel class of Aurora inhibitors based on a pentacyclic scaffold. A prototype pentacyclic inhibitor 32 (AKI-001) derived from two early lead structures improves upon the best properties of each parent and compares favorably to a previously reported Aurora inhibitor, 39 (VX-680). The inhibitor exhibits low nanomolar potency against both Aurora A and Aurora B enzymes, excellent cellular potency (IC50 < 100 nM), and good oral bioavailability. Phenotypic cellular assays show that both Aurora A and Aurora B are inhibited at inhibitor concentrations sufficient to block proliferation. Importantly, the cellular activity translates to potent inhibition of tumor growth in vivo. An oral dose of 5 mg/kg QD is well tolerated and results in near stasis (92% TGI) in an HCT116 mouse xenograft model.