Oxidative DNA Cleavage, Formation of μ-1,1-Hydroperoxo Species, and Cytotoxicity of Dicopper(II) Complex Supported by a <i>p</i>-Cresol-Derived Amide-Tether Ligand
作者:Yuki Kadoya、Katsuki Fukui、Machi Hata、Risa Miyano、Yutaka Hitomi、Sachiko Yanagisawa、Minoru Kubo、Masahito Kodera
DOI:10.1021/acs.inorgchem.9b02093
日期:2019.11.4
Metal complexes to promote oxidative DNA cleavage by H2O2 are desirable as anticancer drugs. A dicopper(II) complex of known p-cresol-derived methylene-tether ligand Hbcc [Cu2(bcc)]3+ did not promote DNA cleavage by H2O2. Here, we synthesized a new p-cresol-derived amide-tether one, 2,6-bis(1,4,7,10-tetrazacyclododecyl-1-carboxyamide)-p-cresol (Hbcamide). A dicopper(II) complex of the new ligand [Cu2(μ-OH)(bcamide)]2+
期望通过H 2 O 2促进氧化性DNA切割的金属配合物作为抗癌药。已知的对甲酚衍生的亚甲基链配体Hbcc [Cu 2(bcc)] 3+的Dicopper (II)配合物不能促进H 2 O 2对DNA的切割。在这里,我们合成了一种新的p甲酚衍生的酰胺系链之一,2,6-双(1,4,7,10- tetrazacyclododecyl -1-羧酰胺) - p甲酚(Hbcamide)。在结构上表征了新配体[Cu 2(μ-OH)(bcamide)] 2+的双铜(II)配合物。该复合物促进了超螺旋质粒pUC19 DNA(I型)与H 2的氧化裂解。在pH 6.0-8.2的O 2中得到晶型II和III。在高pH范围内,反应大大加速。μ-1,1-氢过氧物质形成为活性物质,并在光谱上进行了鉴定。酰胺-束缚复合物在抗HeLa细胞的细胞毒性方面比亚甲基-束缚复合物更有效。