Anticancer activity of hydroxy- and sulfonamide-azobenzene platinum(II) complexes in cisplatin-resistant ovarian cancer cells

被引:24
作者
Samper, Katia G. [1 ,2 ]
Marker, Sierra C. [1 ]
Bayon, Pau [2 ]
MacMillan, Samantha N. [1 ]
Keresztes, Ivan [1 ]
Palacios, Oscar [2 ]
Wilson, Justin J. [1 ]
机构
[1] Cornell Univ, Dept Chem & Chem Biol, Ithaca, NY 14853 USA
[2] Univ Autonoma Barcelona, Dept Quim, Fac Ciencies, E-08193 Barcelona, Spain
关键词
Cisplatin; Cisplatin resistance; Antitumor drug; Ovarian cancer; Azobenzene; Photodynamic therapy; PHOTOSWITCHABLE ARENE RUTHENIUM; DIMETHYLSULFOXIDE COMPLEXES; PHOTODYNAMIC THERAPY; CLINICAL-USE; PT-195; NMR; DNA; CYTOTOXICITY; LIGANDS; AGENTS; CARBOPLATIN;
D O I
10.1016/j.jinorgbio.2017.06.003
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The syntheses of three platinum(II) complexes bearing sulfonamide- ((E)-2-(4-methylphenylsulfonamido)-2',6'-difluoroazobenzene, HL1) and hydroxy-azo-2,6-difluorobenzene ((E)-2-((2,6-difluorophenyl)diazenyl)phenol, HL2) bidentate ligands is described. These complexes, [Pt(L1)(DMSO)Cl] (1), [Pt(L2)(DMSO)Cl] (2), and [Pt (L2)(2)] (3), were characterized by multinuclear NMR spectroscopy, mass spectrometry, and X-ray crystallography. Despite bearing azobenzene functional groups, none of the three complexes undergo photoisomerization. The anticancer activities of these complexes were evaluated in wild-type (A2780) and cisplatin-resistant (A2780CP70) ovarian cancer cells. All three complexes exhibited IC50 values below 10 mu M and displayed similar activity in both A2780 and A2780CP70 cell lines, indicating that they are not cross-resistant with cisplatin. The DNA-binding properties of 1-3 were investigated by circular dichroism spectroscopy and by agarose gel electrophoresis. Both studies suggest that 1 and 2 form monofunctional DNA adducts.
引用
收藏
页码:102 / 110
页数:9
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