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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >DNA photocleavage and anticancer activity of terpyridine copper(II) complexes having phenanthroline bases
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DNA photocleavage and anticancer activity of terpyridine copper(II) complexes having phenanthroline bases

机译:具有菲咯啉碱的三联吡啶铜(II)配合物的DNA光解和抗癌活性

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摘要

Copper(II) complexes [Cu(ph-tpy)(B)](ClO_4) (1-3), where ph-tpy is (4′-phenyl)-2,2′:6′,2″-terpyridine and B is N,N-donor phenanthroline base, viz. 1,10-phenanthroline (phen, 1), dipyridoquinoxaline (dpq, 2), and dipyridophenazine (dppz, 3), were prepared and characterized from analytical and spectral data. Complex 1, characterized by X-ray crystallography, shows a distorted square-pyramidal (4 + 1) CuN_5 coordination geometry having the tridentate ph-tpy ligand at the basal plane and bidentate phen bound to the axial-equatorial sites. The complexes display a d-d band near 650 nm in aqueous DMF. The complexes are avid binders to calf thymus DNA giving the binding order: 3 (dppz) > 2 (dpq) > 1 (phen). The dpq and dppz complexes show photo-induced DNA cleavage activity in red light via photo-redox pathway forming hydroxyl radicals. The cytotoxicity of the dppz complex 3 was studied by MTT assay in HeLa cancer cells. The IC_(50) values are 3.7 and 12.4 μM in visible light of 400-700 nm and dark, respectively.
机译:铜(II)配合物[Cu(ph-tpy)(B)](ClO_4)(1-3),其中ph-tpy为(4'-苯基)-2,2':6',2''-叔吡啶和B是N,N-供体菲咯啉碱,即。制备了1,10-菲咯啉(phen,1),二吡啶并喹喔啉(dpq,2)和二吡咯并吩嗪(dppz,3),并根据分析和光谱数据进行了表征。通过X射线晶体学表征的配合物1显示了扭曲的方金字塔形(4 +1)CuN_5配位几何,在基面上具有三齿ph-tpy配体,并且双齿phen结合到轴向赤道位点。在水性DMF中,络合物在650nm附近显示出d-d带。复合物是小牛胸腺DNA的狂热结合物,结合顺序为:3(dppz)> 2(dpq)> 1(phen)。 dpq和dppz复合物通过形成光自由基的光氧化还原途径在红光中显示光诱导的DNA裂解活性。通过MTT分析在HeLa癌细胞中研究了dppz复合物3的细胞毒性。在400-700 nm的可见光和暗处的IC_(50)值分别为3.7和12.4μM。

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