期刊
JOURNAL OF INORGANIC BIOCHEMISTRY
卷 192, 期 -, 页码 52-61出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jinorgbio.2018.12.012
关键词
Half-sandwich structure; Iridium complexes; alpha-Picolinic acid; Antitumor
资金
- National Natural Science Foundation of China [21671118]
- Taishan Scholars Program
- University Research Development Program of Shandong Province [J18KA082]
- Students Platform for Innovation and Entrepreneurship Training Program of Shandong Province [201710446042]
Eight half-sandwich iridium(III) (Ir-III) complexes of the general formula [(eta(5)-Cp-xbiPh)Ir(O boolean AND N)Cl] (Cp-xbiPh is tetramethyl(biphenyl)cyclopentadienyl, and the O boolean AND N is alpha-picolinic acid chelating ligand and its derivatives) were synthesized and characterized. Compared with cis-platin widely used in clinic, target Ir-III complexes showed at most five times more potent antitumor activity against A549 cells by the MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. Ir-III complexes could be transported by serum albumin, bind with DNA, catalyze the oxidation of nicotinamide-adenine dinucleotid (NADH) and induce the production of reactive oxygen species, which confirmed the antitumor mechanism of oxidation. Ir-III complexes could enter A549 cells followed by an energy-dependent cellular uptake mechanism, meanwhile, target the mitochondria and lysosomes with the Pearson's colocalization coefficient of 0.33 and 0.74, respectively, lead to the lysosomal destruction and the change of mitochondrial membrane potential (Delta psi m), and eventually induce apoptosis.
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