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Photoinduced anticancer activity studies of iridium(III) complexes targeting mitochondria and tubules.

Abstract：

:Three new iridium (III) complexes [Ir (ppy)2 (ipbc)](PF6) (1), [Ir (bzq)2 (ipbc)](PF6) (2) and [Ir (piq)2 (ipbc)](PF6) (3) were designed and synthesized. All the complexes were tested for anticancer activity using 3-(4,5-dimethylthiazole)-2,5-diphenyltetraazolium bromide (MTT) method. The complexes show no cytotoxic activity toward cancer BEL-7402, SGC-7901, Eca-109, A549, HeLa and HepG2 cells. However, upon irradiation with white light, the complexes display high cytotoxicity against BEL-7402 cells with an IC50 value of 5.5 ± 0.8, 7.3 ± 1.3 and 11.5 ± 1.6 μM for 1, 2 and 3, respectively. AO/EB staining and comet assay show that the complexes can induce apoptosis in BEL-7402 cells. The complexes can increase intracellular ROS and Ca2+ levels and cause a decrease in the mitochondrial membrane potential. Autophagic assays exhibit that the complexes can induce autophagy and regulate the expression of Beclin-1 and LC3 proteins. The cell cycle distribution in BEL-7402 cells was carried out by flow cytometry. The expression of Bcl-2 family proteins was studied by western blot. Additionally, the complexes can release cytochrome c and inhibit the polymerization of α-tubulin. Our study reveals that the complexes inhibit the cell growth in BEL-7402 cells through an ROS-mediated mitochondria dysfunction and targeting tubules pathways. These complexes are a promising new entity for the development of multi-target anticancer drugs.

journal_name

Eur J Med Chem

journal_title

European journal of medicinal chemistry

authors

Zhang WY,Yi QY,Wang YJ,Du F,He M,Tang B,Wan D,Liu YJ,Huang HL

doi

10.1016/j.ejmech.2018.04.013

subject

Has Abstract

pub_date

2018-05-10 00:00:00

pages

568-584

eissn

0223-5234

issn

1768-3254

pii

S0223-5234(18)30347-7

journal_volume

151

pub_type

杂志文章

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