Using Fluorescent Post-Labeling To Probe the Subcellular Localization of DNA-Targeted Platinum Anticancer Agents
作者:Song Ding、Xin Qiao、Jimmy Suryadi、Glen S. Marrs、Gregory L. Kucera、Ulrich Bierbach
DOI:10.1002/anie.201210079
日期:2013.3.18
cells: A post‐labeling method was developed to image a DNA‐targeted platinum drug in cancer cells by confocal fluorescence microscopy. This was done using ligation chemistry between an azide‐functionalized platinum‐acridine anticancer drug and an alkyne‐modified dye, Alexa Fluor 488 (green star, see figure). The platinum‐acridine agent was shown to accumulate in the nucleoli of cancer cells (NCI‐H460)
细胞周围的绿色:开发了一种标记后方法,通过共聚焦荧光显微镜对癌细胞中的 DNA 靶向铂药物进行成像。这是使用叠氮化物功能化铂-吖啶抗癌药物和炔改性染料 Alexa Fluor 488(绿色星形,见图)之间的连接化学完成的。铂-吖啶试剂被证明会在癌细胞 (NCI-H460) 的核仁中积聚。
Using a Build-and-Click Approach for Producing Structural and Functional Diversity in DNA-Targeted Hybrid Anticancer Agents
作者:Song Ding、Xin Qiao、Gregory L. Kucera、Ulrich Bierbach
DOI:10.1021/jm301278c
日期:2012.11.26
An efficient screening method was developed for functionalized DNA targeted platinum-containing hybrid anticancer agents based on metal mediated amine-to-nitrile addition, a form of "click" chemistry. The goal of the study was in generate platinum-acridine agents for their use as cytotoxic "warheads" in targeted and multifunctional therapies. This was achieved by introducing hydroxl, carboxylic acid, and azide functionalities in the acridine linker moiety and by varying the nonleaving groups attached to platinum. The assay, which was based on microscale reactions between 6 platinum-nitrile complexes and 10 acridine derivatives, yielded a small library of 60 platinum-acridines. Reactions were monitored, and product mixtures were quantitatively analyzed by automated in-line high-performance liquid chromatography-electrospray mass spectrometry (LC-ESMS) analysis and subjected to cell viability screening using a nonradioactive cell proliferation assay. The new prescreening methodology proves to be a powerful tool for establishing structure-activity relationships and for identifying target compounds.