期刊
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
卷 145, 期 -, 页码 302-314出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ejmech.2017.12.087
关键词
Iridium(III) complex; Apoptosis; Intracellular Ca2+ level; Cytochrome c; Cell invasion; AKT/mTOR
资金
- Natural Science Foundation of Guangdong Province [2016A030313728]
A new ligand THPDP (THPDP =11-(6,7,8,9-tetrahydrophenazin-2-yl)dipyrido[3,2-a:2',3'-c]phenazine) and its iridium(III) complex [Ir(ppy)(2)(THPDP)]PF6 (Ir-1) was synthesized and characterized by elemental analysis, IR, ESI-MS, H-1 NMR and C-13 NMR. The cytotoxicity in vitro of the complex against cancer cells B16, A549, Eca-109, SGC-7901, BEL-7402 and normal NIH 3T3 cell lines was evaluated using MIT method. The IC50 values of the complex toward B16, A549 and Eca-109 cells are 1.0 +/- 0.02, 1.4 +/- 0.03 and 1.6 +/- 0.06 mu M, respectively. The apoptosis was investigated with AO/EB and DAPI staining methods. The complex shows strong ability to inhibit the cell growth in B16, A549 and Eca-109 cells. Ir-1 can induce apoptosis, increase the intracellular ROS level, and cause a decrease in the mitochondrial membrane potential. The intracellular Ca2+ level and the release of cytochrome c were studied under a fluorescent microscope. The cell invasion and autophagy were also performed, and the cell cycle arrest was assayed by flow cytometry. The expression of Bcl-2 family proteins, PI3K, AKT, mTOR, P-mTOR was investigated by western blot. The results show that the complex induces apoptosis through ROS-mediated mitochondria dysfunction and inhibition of AKT/mTOR pathways. These findings are helpful for design and synthesis of iridium(III) complexes as potent anticancer drugs. (C) 2017 Elsevier Masson SAS. All rights reserved.
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