The consumption of Brassica vegetables provides beneficial effects through organic isothiocyanates (ITCs), products of the enzymatic hydrolysis of glucosinolate secondary metabolites. The ITC l‐sulforaphane (l‐SFN) is the principle agent in broccoli that demonstrates several modes of anticancer action. While the anticancer properties of ITCs like l‐SFN have been extensively studied and l‐SFN has been the subject of multiple human clinical trials, the scope of this work has largely been limited to those derivatives found in nature. Previous studies have demonstrated that structural changes in an ITC can lead to marked differences in a compound's potency to 1) inhibit the growth of cancer cells, and 2) alter cellular transcriptional profiles. This study describes the preparation of a library of non‐natural aryl ITCs and the development of a bifurcated screening approach to evaluate the dose‐ and time‐dependence on antiproliferative and chemopreventive properties against human MCF‐7 breast cancer cells. Antiproliferative effects were evaluated using a commercial MTS cell viability assay. Chemopreventive properties were evaluated using an antioxidant response element (ARE)‐promoted luciferase reporter assay. The results of this study have led to the identification of 1) several key structure–activity relationships and 2) lead ITCs for continued development.

中文翻译：

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区分缺电子芳基异硫氰酸酯对人 MCF-7 细胞的抗增殖和化学预防活性模式

食用芸苔属蔬菜通过有机异硫氰酸酯（ITC）（芥子油苷次生代谢物酶水解的产物）提供有益效果。ITC l-萝卜硫素 ( l -SFN) 是西兰花中的主要成分，具有多种抗癌作用。虽然l -SFN等 ITC 的抗癌特性已得到广泛研究，并且l -SFN 已成为多项人体临床试验的主题，但这项工作的范围在很大程度上仅限于自然界中发现的衍生物。先前的研究表明，ITC 的结构变化可能导致化合物功效显着差异：1) 抑制癌细胞生长，2) 改变细胞转录谱。本研究描述了非天然芳基 ITC 库的制备以及分叉筛选方法的开发，以评估针对人 MCF-7 乳腺癌细胞的抗增殖和化学预防特性的剂量和时间依赖性。使用商业 MTS 细胞活力测定来评估抗增殖作用。使用抗氧化反应元件（ARE）促进的荧光素酶报告基因测定评估化学预防特性。本研究的结果确定了 1) 几个关键的结构-活性关系和 2) 用于持续开发的主要 ITC。