设计,合成了新的蒽酰胺-吡唑并[1,5- a ]嘧啶共轭物库,并评估了它们对宫颈癌细胞如HeLa和SiHa的抗癌活性,这些细胞的p53含量很低。所有24种结合物均显示出抗增殖活性,其中一些显示出明显的细胞毒性。在与细胞周期分布相关的测定中,这些结合物诱导HeLa细胞和G 1中的G 2 / M阻滞SiHa细胞中的细胞周期停滞。免疫细胞化学测定显示这些化合物引起p53的核易位,从而表明p53的激活。在子宫颈癌细胞中,p53蛋白被E6癌蛋白降解。免疫印迹和RT-PCR分析证明存在线粒体介导的细胞凋亡,其中涉及p53靶基因,例如BAX,Bcl2和p21(CDKI)。而且,这些化合物增加了p53的磷酸化形式,并提供了诱导细胞凋亡的信号。有趣的是,其中一种缀合物是(2-苯基-7-(3,4,5-三甲氧基苯基)吡唑并[1,5 - a ]嘧啶-5-基)(4-(2-(噻吩-2-基甲基氨基)苯甲酰基)哌嗪-1-
Synthesis and anticancer activity of heteroaromatic linked 4β-amido podophyllotoxins as apoptotic inducing agents
作者:Ahmed Kamal、Jaki R. Tamboli、M.V.P.S. Vishnuvardhan、S.F. Adil、V. Lakshma Nayak、S. Ramakrishna
DOI:10.1016/j.bmcl.2012.10.099
日期:2013.1
17a–i and 18a–d) were synthesized and evaluated for anticancer activity against five human cancer cell lines. Among the series, one of the compound 17g showed significant antiproliferative activity in A549 (lung cancer) cell line. Flow cytometric analysis showed that 17g arrested the cell cycle in the G2/M phase leading to caspase-3 dependent apoptotic cell death. Further, Hoechst 33258 staining and DNA
Synthesis of pyrazolo[1,5-a]pyrimidine linked aminobenzothiazole conjugates as potential anticancer agents
作者:Ahmed Kamal、Jaki R. Tamboli、V. Lakshma Nayak、S.F. Adil、M.V.P.S. Vishnuvardhan、S. Ramakrishna
DOI:10.1016/j.bmcl.2013.03.129
日期:2013.6
A series of pyrazolo[1,5-a]pyrimidine linked 2-aminobenzothizole conjugates (6a-t) were synthesized and evaluated for their anticancer activity against five human cancer cell lines. Among them two compounds 6p and 6m showed significant anticancer activity with IC50 values ranging from 2.01 to 7.07 and 1.94-3.46 mu M, respectively. Moreover, cell cycle arrest in G2/M and reduction in Cdk1 expression level were observed upon treatment of these compounds and they also induced caspase-3 dependent apoptosis. This was further confirmed by staining as well as DNA fragmentation analysis. (C) 2013 Elsevier Ltd. All rights reserved.