Structure-Based Discovery of Novel Amide-Containing Nicotinamide Phosphoribosyltransferase (Nampt) Inhibitors
作者:Xiaozhang Zheng、Paul Bauer、Timm Baumeister、Alexandre J. Buckmelter、Maureen Caligiuri、Karl H. Clodfelter、Bingsong Han、Yen-Ching Ho、Nikolai Kley、Jian Lin、Dominic J. Reynolds、Geeta Sharma、Chase C. Smith、Zhongguo Wang、Peter S. Dragovich、Janet Gunzner-Toste、Bianca M. Liederer、Justin Ly、Thomas O’Brien、Angela Oh、Leslie Wang、Weiru Wang、Yang Xiao、Mark Zak、Guiling Zhao、Po-wai Yuen、Kenneth W. Bair
DOI:10.1021/jm4008664
日期:2013.8.22
Crystal structures of several urea- and thiourea-derived compounds in complex with the nicotinamide phosphoribosyltransferase (Nampt) protein were utilized to design a potent amide-containing inhibitor bearing an aza-indole moiety (7, Nampt BC IC50 = 9.0 nM, A2780 cell proliferation IC50 = 10 nM). The Nampt-7 cocrystal structure was subsequently obtained and enabled the design of additional amide-containing inhibitors which incorporated various other fused 6,5-heterocyclic moieties and biaryl sulfone or sulfonamide motifs. Additional modifications of these molecules afforded many potent biaryl sulfone-containing Nampt inhibitors which also exhibited favorable in vitro ADME properties (microsomal and hepatocyte stability, MOCK permeability, plasma protein binding). An optimized compound (58) was a potent inhibitor of multiple cancer cell lines (IC50 <10 nM vs U251, HT1080, PC3, MiaPaCa2, and HCT116 lines), displayed acceptable mouse PK properties (F = 41%, CL = 52.4 mL/min/kg), and exhibited robust efficacy in a U251 mouse xenograft model.