Studies on antitumor mechanism of two planar platinum(II) complexes with 8-hydroxyquinoline: synthesis, characterization, cytotoxicity, cell cycle and apoptosis.

Studies on antitumor mechanism of two planar platinum(II) complexes with 8-hydroxyquinoline: synthesis, characterization, cytotoxicity, cell cycle and apoptosis.
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两种平面铂(II)与8-羟基喹啉配合物的抗肿瘤机制研究:合成、表征、细胞毒性、细胞周期和凋亡

DOI:
10.1016/j.ejmech.2014.12.052
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发表时间:
2015-03
影响因子:
6.7
通讯作者:
梁宏
梁宏
中科院分区:
医学1区
文献类型:
--
作者:
Qin QP;Chen ZF;Qin JL;He XJ;Li YL;Liu YC;Huang KB;梁宏

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[Pt(Q)2](1)和[Pt(MQ)2](2)对BEL-7404、Hep-G2、NCI-H460、T-24、A549等肿瘤细胞的杀伤活性增强,而对正常HL-7702细胞的杀伤活性较低,1和2可使细胞周期分别阻滞于G2和S期。p53特异性抑制剂pifithrin-α可使细胞周期阻滞于G1期。Pifithrin-α和1,2对BEL-7404细胞的p53表达有明显抑制作用,但1,2可引起BEL-7404细胞线粒体膜电位降低,活性氧水平升高,细胞色素c、apaf-1和caspase-3/9比值升高,可能通过线粒体功能障碍途径诱导细胞凋亡,而Pifithrin-α则无此作用。1和2与DNA的相互作用很可能是通过嵌入作用。
[Pt(Q)2] (1) and [Pt(MQ)2] (2) exhibited enhanced cytotoxicity against BEL-7404, Hep-G2, NCI–H460, T-24, A549 tumor cells but low cytotoxicity on normal HL-7702 cells.1and2could cause the cell cycle arrest in G2 and S phase, respectively. While pifithrin-α, a specific p53 inhibitor, induced cell cycle arrest in G1 phase. Although1,2and pifithrin-α caused serious inhibition on p53,1and2significantly cause the loss of mitochondrial membrane potential and increase of the reactive oxygen species level, cytochromec, apaf-1 and caspase-3/9 ratio in BEL-7404 cells.1and2may trigger the cell apoptosis through a mitochondrial dysfunction pathway whereas pifithrin-α does not. The interactions of1and2with DNA are most probably via an intercalation.
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