作者:Mariano Pertino、Cristina Theoduloz、Marco Bastías、Guillermo Schmeda-Hirschmann
DOI:10.3390/molecules18055936
日期:——
Several diterpenes with the labdane skeleton show biological activity, including antiproliferative effects. Most of the research work on bioactive labdanes has been carried out on naturally occurring diterpenes and semisynthetic derivatives, but much less is known on the effects of diterpene dimers. The aim of the present work was to synthesize dimeric diterpenes from the labdane imbricatolic acid using esters, ethers and the triazole ring as linkers. Some 18 new derivatives were prepared and the compounds were evaluated for antiproliferative activity on human normal fibroblasts (MRC-5) and the following human tumor cell lines: AGS, SK-MES-1, J82 and HL-60. The diethers 8–10, differing in the number of CH2 units in the linker, presented better antiproliferative activity with a maximum effect for the derivative 9. The best antiproliferative effect against HL-60 cells was found for compounds 3 and 17, with IC50 values of 22.3 and 23.2 μM, lower than that found for the reference compound etoposide (2.23 μM). The compounds 9, 17 and 11 were the most active derivatives towards AGS cells with IC50 values of 17.8, 23.4 and 26.1 μM. A free carboxylic acid function seems relevant for the effect as several of the compounds showed less antiproliferative effect after methylation.
具有拉布丹骨架的几种二萜具有生物活性,包括抗增殖作用。有关具有生物活性的唇形酮的大部分研究工作都是针对天然存在的二萜和半合成衍生物进行的,但对二萜二聚体的作用却知之甚少。本研究的目的是利用酯类、醚类和三唑环作为连接剂,从马唇烷亚麻酸中合成二聚二萜。研究人员制备了约 18 种新衍生物,并对这些化合物在人类正常成纤维细胞(MRC-5)和以下人类肿瘤细胞系中的抗增殖活性进行了评估:AGS、SK-MES-1、J82 和 HL-60。衍生物 8-10 的抗增殖活性较好,其中衍生物 9 的抗增殖活性最高。化合物 3 和 17 对 HL-60 细胞的抗增殖效果最好,其 IC50 值分别为 22.3 和 23.2 μM,低于参考化合物依托泊苷的 IC50 值(2.23 μM)。化合物 9、17 和 11 是对 AGS 细胞最有效的衍生物,其 IC50 值分别为 17.8、23.4 和 26.1 μM。由于一些化合物在甲基化后的抗增殖效果较弱,因此游离羧酸功能似乎与这种效果有关。