Semi-synthesis and antitumor activity of 6-isomers of 5, 8-O-dimethyl acylshikonin derivatives
作者:Wen Zhou、Xu Zhang、Ling Xiao、Jing Ding、Quan-Hua Liu、Shao-Shun Li
DOI:10.1016/j.ejmech.2011.05.006
日期:2011.8
that 6-isomers of 5, 8-O-dimethyl acylshikonin derivatives were more active than their corresponding 2-isomers. Thus, we may conclude that the position of the side chain of shikonin attached to 5,8-dimethoxy -1,4-naphthoquinone is associated with the antitumor activity.
我们最近发现5、8- O-二甲基酰基紫草素衍生物显示出对MCF-7的选择性,并且对正常细胞没有毒性。在此,从紫草素开始合成一系列相应的5、8 - O-二甲基酰基紫草素衍生物的6-异构体。细胞毒性的体外证据表明,大多数化合物比紫草素更具活性或与之相比,并保留了对MCF-7,MDA-MB-231的选择性,而在正常细胞中则无毒性。而且,位置异构体5p,6c的体内抗癌活性进一步表明5、8 - O的6个异构体-二甲基酰基紫草素衍生物比其相应的2-异构体更具活性。因此,我们可以得出结论,紫草素侧链连接到5,8-二甲氧基-1,4-萘醌的位置与抗肿瘤活性有关。