Synthesis and Evaluation of Noviose Replacements on Novobiocin That Manifest Antiproliferative Activity
作者:Huiping Zhao、Bhaskar Reddy Kusuma、Brian S. J. Blagg
DOI:10.1021/ml100070r
日期:2010.10.14
Structural modifications to the coumarin core and benzamide side chain of novobiocin have successfully transformed the natural product from a selective DNA gyrase inhibitor into a potent inhibitor of the Hsp90 C-terminus. However, no structure−activity relationship studies have been conducted on the noviose appendage, which represents the rate-limiting synthon in the preparation of analogues. Therefore
对新生霉素的香豆素核心和苯甲酰胺侧链的结构修饰已成功将天然产物从选择性 DNA 促旋酶抑制剂转化为 Hsp90 C 端的有效抑制剂。然而,没有对 noviose 附属物进行构效关系研究,它代表了类似物制备中的限速合成子。因此,合成并评估了一系列糖模拟物和非糖衍生物,以鉴定表现出 Hsp90 抑制作用的简化化合物。对两种乳腺癌细胞系的评估表明,用简化的烷基胺替代立体化学复合物 noviose 增加了抗增殖活性,导致新生霉素类似物的 IC 50值在中纳摩尔范围内。
Targeting the Heat Shock Protein 90 Dimer with Dimeric Inhibitors
作者:Bhaskar Reddy Kusuma、Laura B. Peterson、Huiping Zhao、George Vielhauer、Jeffrey Holzbeierlein、Brian S. J. Blagg
DOI:10.1021/jm200553w
日期:2011.9.22
The design, synthesis, and biological evaluation of conformationally constrained coumermycin Al analogues are reported. Compounds were evaluated against both breast cancer (SKBr3 and MCF7) and prostate cancer (PC3 mm2, A549, and HT29) cell lines. Non-noviosylated coumermycin Al analogues that manifest potent antiproliferative activity resulting from Hsp90 inhibition are provided, wherein replacement of the stereochemically complex noviose sugar with readily available piperidine rings resulted in similar to 100 fold increase in antiproliferative activities as compared to coumermycin Al, producing small molecule Hsp90 inhibitors that exhibit nanomolar activities.