吡啶类单核钴(Ⅱ)配合物的合成、结构、与DNA的相互作用及细胞毒性
Synthesis, Structure, DNA interaction and Cytotoxicity of Pyridine-Based Mononuclear Cobalt(Ⅱ) Complex
作者单位E-mail
高春艳 山西农业大学基础部, 晋中 030801 gaocynk@163.com 
乔佩佩 山西农业大学基础部, 晋中 030801  
杨皇泽 山西农业大学基础部, 晋中 030801  
张鹏飞 山西农业大学基础部, 晋中 030801  
雷云博 山西农业大学基础部, 晋中 030801  
张永坡 山西农业大学基础部, 晋中 030801  
王敏 山西农业大学农学院, 晋中 030801  
岳爱琴 山西农业大学农学院, 晋中 030801  
赵晋忠 山西农业大学基础部, 晋中 030801  
杜维俊 山西农业大学农学院, 晋中 030801 duweijun68@126.com 
摘要: 合成了一个新的单核钴配合物[Co(L)Cl2],配体L为吡啶类多齿配体4-甲基-N,N-二(吡啶-2-亚甲基)苯胺。对化合物进行了红外光谱、元素分析、X射线单晶衍射的表征。结果表明配合物的Co(Ⅱ)中心为五配位畸变的三角双锥构型。利用电子吸收、发射光谱和凝胶电泳等方法研究了配合物与DNA的相互作用。结果表明不加诱导剂时该配合物与DNA能表现出一定程度的切割活性,而加入诱导剂过氧化氢后,化学核酸酶活性显著提高。其切割机理为氧化切割机理,其中活性氧可能为·OH和1O2,且配合物与DNA的结合部位可能在大沟槽处。另外,用MTT实验测定了该配合物对体外HeLa、BGC-823、NCI-H460肿瘤细胞生长的抑制能力。
关键词: 钴配合物  吡啶类配体  DNA键合  DNA切割  细胞毒性
基金项目: 山西省重点研发计划项目(No.201703D211001,201903D221036,201703D221008-4,201703D221004-5)、山西省自然科学基金(No.201701D221157,201701D221158)、山西农业大学引进人才科研启动金(No.2013YJ40)和山西省高等学校大学生创新创业训练项目(No.2019136,2019137)资助项目。
Abstract: A new mononuclear complex[Co(L)Cl2] (L=4-methyl-N,N-bis(pyridin-2-ylmethyl) aniline) was synthesized and characterized by infrared spectroscopy, elemental analysis and X-ray single crystal diffraction. The results show that the Co(Ⅱ) center of the complex is a distorted trigonal-bipyramidal configuration with N3Cl2 donor sets. The interaction between the complex and DNA was studied by the electron absorption, emission spectroscopy and gel electrophoresis. The results reveal that the complex bind to CT-DNA by partial intercalation binding mode, and in the presence of hydrogen peroxide as a inducer, the DNA cleavage abilities of the complex are significantly improved. The Oxidative mechanism has been demonstrated via the pathway involving both hydroxyl radicals (·OH) and singlet oxygen (1O2) as ROS, and the binding site between the complex and DNA may be in the large groove. In addition, in vitro cytotoxicity of the drug has been tested by MTT against HeLa, BGC-823 and NCI-H460 cell lines.
Keywords: cobalt(Ⅱ) complex  pyridine-based ligand  DNA binding  DNA cleavage  cytotoxicity
投稿时间:2020-03-07 修订日期:2020-05-27
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高春艳,乔佩佩,杨皇泽,张鹏飞,雷云博,张永坡,王敏,岳爱琴,赵晋忠,杜维俊.吡啶类单核钴(Ⅱ)配合物的合成、结构、与DNA的相互作用及细胞毒性[J].无机化学学报,2020,36(9):1783-1790.
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