Pyrazoloadenine Inhibitors of the RET Lung Cancer Oncoprotein Discovered by a Fragment Optimization Approach
作者:Debasmita Saha、Katie Rose Ryan、Naga Rajiv Lakkaniga、Erica Lane Smith、Brendan Frett
DOI:10.1002/cmdc.202100013
日期:2021.5.18
A fragment-based drug-discovery approach was used on a pyrazoloadenine fragment library to uncover new molecules that target the RET (REarranged during Transfection) oncoprotein, which is a driver oncoprotein in ∼2 % of non-small-cell lung cancers. The fragment library was screened against the RET kinase and LC-2/ad (RET-driven), KM-12 (TRKA-driven matched control) and A549 (cytotoxic control) cells
基于片段的药物发现方法用于吡唑核苷片段库,以发现靶向 RET(转染期间重新排列)癌蛋白的新分子,该蛋白是约 2% 的非小细胞肺癌的驱动癌蛋白。针对 RET 激酶和 LC-2/ad(RET 驱动)、KM-12(TRKA 驱动匹配对照)和 A549(细胞毒性对照)细胞筛选片段文库,以鉴定可抑制 RET 驱动生长的选择性支架。在生化测定中发现未取代的吡唑核苷片段对 RET 有活性,但降低了非 RET 驱动的细胞系中的细胞活力 (EC 50= 1 和 3 μM,分别)。为了提高 RET 的选择性,在 RET 活性位点中模拟了吡唑核苷,并确定了两个结构域,用吡唑核苷片段衍生物进行探测以提高 RET 亲和力。合并每个结构域的支架以生成新型先导化合物8 p,它对 RET 癌蛋白表现出更高的活性和选择性(A549 EC 50 =5.92 μM,LC-2/ad EC 50 =0.016 μM,RET IC 50