all the de-protected (without Boc group) derivatives showed much stronger cytotoxic activity than GA, and surprisingly enough, all the GN series of the compounds were more potent than GO series against various tumor cells. Among them, the compound 26 (amide linkages in C-3 position) exhibited stronger antitumor activity against A549 cell line (IC50 = 2.109 ± 0.11 μM) than the positive drug cisplatin (IC50 = 9
甘草次酸(GA)一直是抗癌的先导化合物,并吸引了世界各地的许多科学家。然而,其抗肿瘤活性还不够强。为提高GA的细胞毒性并探讨键合方式对抗肿瘤活性的影响,GA-OH系列(GO,C-3位的酯)和GA-NH 2系列(GN,C-3位的酰胺键)包括32种化合物已经被设计和合成了。对所有化合物进行了体外筛选对A549,HepG2,MCF-7,Hela和MDCK
细胞系的细胞毒性。结果,所有去保护的(没有Boc基团)衍
生物都显示出比GA强得多的细胞毒活性,而且令人惊讶的是,所有GN系列化合物对各种肿瘤细胞的功效都比GO系列更强。其中,化合物26(位于C-3位置的酰胺键)对A549
细胞系(IC 50 = 2.109±0.11μM )表现出比阳性药物
顺铂(IC 50 = 9.001±0.37μM)更强的抗肿瘤活性。进一步的研究表明,化合物26可以通过细胞核断裂诱导A549细胞凋亡。凋亡的检测和细胞周期分析