Synthesis and Cytotoxic Activity of 2,6-Diarylidenecyclohexanones and their 6-Amino-1,3-dimethyluracil Monoadducts
作者:Erika Madeleyne Ramos-Rivera、Cuauhtemoc Alvarado、Jose D. Solano、Luis Roa de la Fuente、Angeles Dominguez-Rivera、Miguel Angel Vilchis-Reyes、Miguel Angel Martinez-Urbina
DOI:10.2174/1570180815666180105164032
日期:2018.8.27
Purpose: The aim of this study was to synthesize a series of symmetrical 2,6-
diarylidenecyclohexanones (1-6) and their 6-amino-1,3-dimethyluracil monoadducts (7-10) to
evaluate their cytotoxicity in a panel of cell lines. Secondly, to evaluate the effect of the most potent
compound on the cell cycle of HeLa cells.
Methods: The 2,6-diarylidenecyclohexanones (1-6) were synthesized by the Claisen-Schmidt condensation
using cyclohexanone and the corresponding aromatic aldehyde. Monoadducts (7-10) were
obtained relying in a one-pot procedure, involving a 1,4-addition of 6-amino-1,3-dimethyluracil
followed by self-condensation. The cytotoxicity assay was performed using the MTT assay. The
IC50 value was obtained from the dose-response curve at 48 h of treatment. HeLa cell cycle analysis
was performed by flow cytometry using propidium iodide to quantify the DNA content.
Results: Four of the synthesized 2,6-diarylidenecyclohexanones displayed moderate cytotoxicity in
HeLa, K562, MCF7, SW480 and C33 human cell lines ranging from 15.5 to 63.2 µM. Compound 5
was the most potent in K562 (IC50 15.5 µM), C-33 (IC50 16.6 µM) and HeLa (19.0 µM) cell lines. In
contrast, when a 6-amino-1,3-dimethyluracil group was added to the 2,6-diarylidenecyclohexanones,
the activity was lost. In addition, we showed that compound 5 produces disruption in the cell cycle
of HeLa cells, producing an increment in both the sub-G0/G1 and the G0/G1 phase population with a
concomitant decrease in the S phase.
Conclusion: Compound 1-3 and 5, which are 2,6-diarylidenecyclohexanone derivatives, are cytotoxic
on human cell lines. The formation of monoadducts of 6-amine-1,3-dimethyluracil (7-10) was
detrimental for the cytotoxic potency. The appearance of a Sub G0/G1 cell population peak, on
HeLa cells treated with compound 5, suggests this compound possibly induces an apoptotic cell death.
目的:本研究旨在合成一系列对称的 2,6-二芳基亚癸环己酮(1-6)及其 6-氨基-1,3-二甲基尿嘧啶单加成物(7-10),以评估它们在一系列细胞系中的细胞毒性。其次,评估最有效化合物对 HeLa 细胞周期的影响。 方法:2,6-二亚芳基环己酮(1-6)是利用环己酮和相应的芳香醛通过克莱森-施密特缩合反应合成的。单加成物(7-10)是通过一锅程序获得的,涉及 6-氨基-1,3-二甲基尿嘧啶的 1,4 加成,然后进行自缩合。细胞毒性试验采用 MTT 法进行。根据处理 48 小时后的剂量-反应曲线得出 IC50 值。通过流式细胞仪对 HeLa 细胞周期进行分析,使用碘化丙啶对 DNA 含量进行定量。 结果:合成的四种 2,6-二亚芳基环己酮在 HeLa、K562、MCF7、SW480 和 C33 人体细胞系中显示出中等程度的细胞毒性,范围在 15.5 至 63.2 µM 之间。化合物 5 对 K562(IC50 15.5 µM)、C-33(IC50 16.6 µM)和 HeLa(19.0 µM)细胞株的作用最强。相反,当在 2,6-二亚二萜环己酮中加入 6-氨基-1,3-二甲基尿嘧啶基团时,活性就会丧失。此外,我们还发现化合物 5 会扰乱 HeLa 细胞的细胞周期,导致亚 G0/G1 期和 G0/G1 期细胞数量增加,同时 S 期细胞数量减少。 结论:化合物 1-3 和 5 是 2,6-二亚芳基环己酮衍生物,对人类细胞株具有细胞毒性。6-胺-1,3-二甲基尿嘧啶(7-10)形成的单加成物对细胞毒性效力不利。用化合物 5 处理的 HeLa 细胞出现了 Sub G0/G1 细胞群峰值,这表明该化合物可能会诱导细胞凋亡。