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Dicopper(II) Complexes of p-Cresol-2,6-Bis(dpa) Amide-Tether Ligands: Large Enhancement of Oxidative DNA Cleavage, Cytotoxicity, and Mechanistic Insight by Intracellular Visualization
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-12-01 , DOI: 10.1021/acs.inorgchem.0c02954
Yuki Kadoya 1 , Machi Hata 1 , Yoshiki Tanaka 1 , Atsuhiro Hirohata 1 , Yutaka Hitomi 1 , Masahito Kodera 1
Affiliation  

Dicopper complexes of a new p-cresol-2,6-bis(dpa) amide-tether ligand (HL1), [Cu2(μ-OH2)(μ-1,3-OAc)(L1)](ClO4)2 (1) and [Cu2(μ-1,1-OAc)(μ-1,3-OAc)(L1)]X (X = ClO4 (2a), OAc (2b)) were synthesized and structurally characterized. 2b rapidly cleaves supercoiled plasmid DNA by activating H2O2 at neutral pH to a linear DNA and shows remarkable cytotoxicity in comparison with related complexes. As 2b is more cytotoxic than HL1, the dicopper core is kept in the cell. A boron dipyrromethene (Bodipy)-modified complex of the p-cresol-2,6-bis(dpa) amide-tether ligand having a Bodipy pendant (HL2), [Cu2(μ-OAc)2(L2)](OAc) (3), was synthesized to visualize intracellular behavior, suggesting that 2b attacks the nucleolus and mitochondria. A comet assay clearly shows that 2b does not cleave nuclear DNA. The apoptotic cell death is evidenced from flow cytometry.

中文翻译:

-Cresol-2,6-双(dpa)酰胺系链配体的Dicopper(II)配合物:通过细胞内可视化大大增强氧化DNA切割,细胞毒性和机理的了解。

一个新的复合物亚铜p甲酚-2,6-双(DPA)酰胺系链配体(HL1),[铜2(μ-OH 2)(μ-1,3-OAC)(L1)](CLO 421)和[Cu 2(μ-1,1-OAc)(μ-1,3-OAc)(L1)] X(X = ClO 42a),OAc(2b))合成并在结构上表征。2b通过在中性pH下将H 2 O 2活化为线性DNA迅速切割超螺旋质粒DNA,并且与相关复合物相比显示出显着的细胞毒性。作为2b比HL1具有更强的细胞毒性,双铜芯保留在细胞中。甲硼二吡咯亚甲基(BODIPY)改性络合物的p甲酚-2,6-双(DPA),其具有侧挂氟硼荧(HL2),[铜酰胺系绳配体2(μ-OAC)2(L2)](OAC )(3)被合成以可视化细胞内行为,表明2b攻击核仁和线粒体。彗星实验清楚地表明2b不会裂解核DNA。流式细胞术证明凋亡细胞死亡。
更新日期:2020-12-01
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