Synthesis, G-Quadruplex Stabilisation, Docking Studies, and Effect on Cancer Cells of Indolo[3,2-<i>b</i>]quinolines with One, Two, or Three Basic Side Chains
作者:João Lavrado、Pedro M. Borralho、Stephan A. Ohnmacht、Rui E. Castro、Cecília M. P. Rodrigues、Rui Moreira、Daniel J. V. A. dos Santos、Stephen Neidle、Alexandra Paulo
DOI:10.1002/cmdc.201300288
日期:2013.8.19
binding and G4 DNA thermal stabilisation increase with an N5‐methyl or a 7‐carboxylate group and propylamine side chains, whereas selectivity between G4 and duplex DNA appears to be modulated by the number and relative position of basic side chains. From all the indoloquinoline derivatives studied, the novel trisubstituted compounds 3 d and 4 d, bearing a 7‐(aminoalkyl)carboxylate side chain, stand out
端粒和致癌启动子区域中的G-四链体(G4)DNA结构是癌症治疗的潜在目标,并且已证明G4配体可调节端粒酶活性和癌基因转录。在这里,我们报告了20种吲哚[3,2- b]的合成和G4热稳定作用,通过FRET熔解测定确定]喹啉单,双和三取代有碱性侧链。还进行了分子建模研究,以试图使配体与G4的结合姿势合理化。总体而言,结果表明配体结合和G4 DNA热稳定性随N5-甲基或7-羧基和丙胺侧链而增加,而G4和双链DNA之间的选择性似乎受碱性侧基的数量和相对位置的调节链。在所有研究过的吲哚喹啉衍生物中,带有7-(氨基烷基)羧酸酯侧链的新型三取代化合物3 d和4 d脱颖而出,是最有希望的化合物。它们显示出较高的G4热稳定性(ΔT m值在17至8°C之间),且G4间的ΔHsp90A > KRas21R≈F21T > c-Kit2的T m趋势,对G4的选择性比双链DNA高10倍,对HCT116癌细胞系(IC 50和IC