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Pyrazolone-Based Zn(II) Complexes Display Antitumor Effects in Mutant p53-Carrying Cancer Cells
Journal of Medicinal Chemistry ( IF 6.8 ) Pub Date : 2024-09-02 , DOI: 10.1021/acs.jmedchem.4c01298
Sonila Xhafa 1 , Corrado Di Nicola 1 , Alessia Tombesi 2 , Riccardo Pettinari 2 , Claudio Pettinari 2 , Francesca Scarpelli 3 , Alessandra Crispini 3 , Massimo La Deda 3 , Angela Candreva 3 , Alessia Garufi 4 , Gabriella D'Orazi 4, 5 , Agustín Galindo 6 , Fabio Marchetti 1
Affiliation  

The synthesis and characterization of nine Schiff bases of pyrazolone ligands HLn (n = 1–9) and the corresponding zinc(II) complexes 19 of composition [Zn(Ln)2] (n = 1–9) are reported. The molecular structures of complexes 2, 3, 4, 8, and 9 were determined by single-crystal X-ray diffraction analysis, highlighting in all cases a distorted tetrahedral geometry around the Zn(II) ion. Density functional theory studies are performed on both the HLn ligands and the derived complexes. A mechanism of dissociation and hydrolyzation of the coordinated Schiff base ligands is suggested, confirmed experimentally by powder X-ray diffraction study and photophysical studies. Complexes 1–9 were investigated in vitro as anticancer agents, along with mutant p53 (mutp53) protein levels in human cancer cell lines carrying R175H and R273H mutp53 proteins. Only those complexes with the highest Zn(II) ion release via dissociation have shown a significant cytotoxic activity with reduction of mutp53 protein levels.

中文翻译:


基于吡唑酮的 Zn(II) 复合物在携带突变 p53 的癌细胞中显示出抗肿瘤作用



报道了吡唑啉酮配体HL n ( n = 1–9) 的九种希夫碱和相应的组成为 [Zn(L n ) 2 ] ( n = 1–9) 的锌 (II) 配合物19的合成和表征。配合物23489的分子结构通过单晶 X 射线衍射分析确定,在所有情况下都突出显示了 Zn(II) 离子周围的扭曲四面体几何形状。对HL n配体和衍生复合物进行了密度泛函理论研究。提出了配位希夫碱配体的解离和水解机制,并通过粉末 X 射线衍射研究和光物理研究进行了实验证实。在体外研究了复合物1-9作为抗癌剂的作用,以及携带 R175H 和 R273H mutp53 蛋白的人类癌细胞系中突变 p53 (mutp53) 蛋白水平。只有那些通过解离释放 Zn(II) 离子最高的复合物才显示出显着的细胞毒活性,并降低 mutp53 蛋白水平。
更新日期:2024-09-02
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