Systematic Chemical Mutagenesis Identifies a Potent Novel Apratoxin A/E Hybrid with Improved in Vivo Antitumor Activity
作者:Qi-Yin Chen、Yanxia Liu、Hendrik Luesch
DOI:10.1021/ml200176m
日期:2011.11.10
Apratoxins are cytotoxic marine natural products that prevent cotranslational translocation early in the secretory pathway. We showed that apratoxins downregulate receptors and growth factor ligands, giving a one–two punch to cancer cells, particularly those that rely on autocrine loops. Through total synthesis, we tested the effects of amino acid substitutions, including alanine scanning, on the downregulation
Apratoxins 是具有细胞毒性的海洋天然产物,可防止分泌途径早期的共翻译易位。我们发现 apratoxin 会下调受体和生长因子配体,对癌细胞,特别是那些依赖自分泌环的细胞,给予一到两次的打击。通过全合成,我们测试了氨基酸取代(包括丙氨酸扫描)对受体酪氨酸激酶和血管内皮生长因子 A(VEGF-A)下调的影响,并通过选定手性中心的差向异构化探测了靶标参与的立体特异性。对两种分泌分子的不同作用表明,可以通过结构修饰调整阿普雷毒素对分泌抑制的底物选择性,以提供量身定制的治疗。