Second Generation G-Quadruplex Stabilizing Trimethine Cyanines
摘要:
G-四链 DNA 被认为是开发新型选择性化疗药物的一个非常吸引人的靶点,这可能显著减少对正常细胞的毒性。特别是,选择性结合 G-四链结构而不针对双链 DNA 的氰染料因其高度适应结构改造而受到关注,这使得对其生物分子相互作用进行微调成为可能。我们之前报道了设计用于通过末端堆叠相互作用有效结合 G-四链的五甲基和对称三甲基氰染料。在这里,我们报告了一种第二代药物候选物,即不对称三甲基氰染料。这些化合物已经合成并评估了它们的四链结合属性。引入苯[c,d]吲哚啉杂环单元提高了整体四链结合能力,而延长烷基链的长度则增加了四链与双链的结合特异性。
Synthesis and evaluation of carbocyanine dyes as PRMT inhibitors and imaging agents
摘要:
Protein arginine methylation regulates multiple biological processes. Deregulation of protein arginine methyltransferase (PRMT) activities has been observed in many disease phenotypes. Small molecule probes that target PRMTs with strong affinity and selectivity can be used as valuable tools to dissect biological mechanisms of arginine methylation and establish the role of PRMT proteins in a disease process. In this work, we report synthesis and evaluation of a class of carbocyanine compounds containing indolium, benz[e]indolium or benz[c,d]indolium heterocyclic moieties that bind to the predominant arginine methyltransferase PRMT1 and inhibit its methyltransferase activity at low micromolar potencies. In particular, the developed molecules have long wavelength colorimetric and fluorometric photoactivities, which can be used for optical and near-infrared fluorescence imaging in cells or biological tissues. Together, these new chemical probes have potential application in PRMT studies both as enzyme inhibitors and as fluorescent dyes for microscope imaging. (C) 2012 Elsevier Masson SAS. All rights reserved.