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Preparation of Rhodium(III) complexes with 2(1H)-quinolinone derivatives and evaluation of their in vitro and in vivo antitumor activity.
European Journal of Medicinal Chemistry 2018 May 11
A series of 2(1H)-quinolinone derivatives and their rhodium (III) complexes were designed and synthesized. All the rhodium (III) complexes exhibited higher in vitro cytotoxicity for Hep G2, HeLa 229, MGC80-3, and NCI-H460 human tumor cell lines than their ligands and cisplatin, and among them complex 9 was found to be selectively cytotoxic to tumor cells. Further investigation revealed that complex 9 caused cell cycle arrest at the G2/M phase and induced apoptosis, and inhibited the proliferation of Hep G2 cells by impeding the phosphorylation of epidermal growth factor receptor (EGFR) and its downstream enzymes. Complex 9 also up-regulated the proapoptotic proteins Bak, Bax, and Bim, which altogether activated caspase-3/9 to initiate cell apoptosis. Notably, complex 9 effectively inhibited tumor growth in the NCI-H460 xenograft mouse model with less adverse effect than cisplatin.
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