Our efforts to get therapeutically useful colchicine derivatives for the treatment of cancer have led us to synthetize and biologically evaluate twenty-seven N,N′-disubstituted ureas containing a colchicine moiety and an aryl fragment. The cytotoxicity of the compounds, their ability to inhibit the expression of oncogenes related to telomerase activation and to the VEGF/VEGFR-2 autocrine process, such as c-MYC, hTERT and VEGF and their capability to downregulate c-MYC and VEGFR-2 proteins and the secretion of VEGF have been measured. In these biological evaluations, we have found that the change of the acetyl group in colchicines for an N-arylurea unit causes a great improvement in anticancer properties. The most promising derivatives were compounds 6 (o-Cl) and 14 (o,o-di-F) as they were able to downregulate all the tested targets at a concentration below their IC₅₀ values. Thus, the arylurea unit enhances the potential of colchicine as an anticancer agent.

我们为获得治疗上有用的秋水仙碱衍生物来治疗癌症的努力已使我们合成并生物学评估了含有秋水仙碱部分和芳基片段的27个N，N'-二取代尿素。化合物的细胞毒性，它们抑制与端粒酶激活以及与VEGF / VEGFR-2自分泌过程有关的癌基因表达的能力，例如c-MYC，hTERT和VEGF，以及它们下调c -MYC和VEGFR-2的能力。已经测量了蛋白质和VEGF的分泌。在这些生物学评估中，我们发现秋水仙碱中N的乙酰基的变化-芳基脲单元可大大提高抗癌性能。最有希望的衍生物是化合物6（o- Cl）和14（o，o -di-F），因为它们能够以低于其IC ₅₀值的浓度下调所有测试目标。因此，芳基脲单元增强了秋水仙碱作为抗癌剂的潜力。