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A Strategy to Conjugate Bioactive Fragments to Cytotoxic Diiron Bis(cyclopentadienyl) Complexes
Organometallics ( IF 2.5 ) Pub Date : 2021-07-02 , DOI: 10.1021/acs.organomet.1c00270
Silvia Schoch 1 , Mouna Hadiji 2 , Sarah A P Pereira 3 , M Lúcia M F S Saraiva 3 , Simona Braccini 1 , Federica Chiellini 1 , Tarita Biver 1, 4 , Stefano Zacchini 5 , Guido Pampaloni 1 , Paul J Dyson 2 , Fabio Marchetti 1
Affiliation  

A series of bioactive molecules were synthesized from the condensation of aspirin or chlorambucil with terminal alkynes bearing alcohol or amine substituents. Insertion of the resulting alkynes into the iron–carbyne bond of readily accessible diiron bis(cyclopentadienyl) μ-aminocarbyne complexes, [1a,b]CF3SO3, afforded novel diiron complexes with a bridging vinyliminium ligand, [210]CF3SO3, functionalized with a bioactive moiety. All compounds were characterized by elemental analysis and IR and multinuclear NMR spectroscopy and in three cases by single-crystal X-ray diffraction. Moreover, the D2O solubility, stability in D2O and cell culture media, and octanol–water partition coefficients of diiron complexes were determined spectroscopically. The cytotoxicity of the complexes was assessed in the tumorigenic A2780 and A2780cisR and the nontumorigenic HEK 293T cell lines. Some complexes exhibit high potency and the ability to overcome resistance in A2780cisR cells (aspirin complexes) or high selectivity relative to HEK 293T cells (chlorambucil complexes). Further studies indicate that the complexes significantly trigger intracellular ROS production, irrespective of the nature of the bioactive fragment. DNA alkylation and protein binding studies were also undertaken.

中文翻译:

将生物活性片段与细胞毒性二铁双(环戊二烯基)复合物结合的策略

由阿司匹林或苯丁酸氮芥与带有醇或胺取代基的末端炔烃缩合合成一系列生物活性分子。将得到的炔烃插入到易于接近的二铁双(环戊二烯基)μ-氨基碳炔配合物 [ 1a , b ]CF 3 SO 3的铁-碳炔键中,提供了具有桥连乙烯基亚胺配体 [ 210 ]CF 的新型二铁配合物3 SO 3,用生物活性部分功能化。所有化合物均通过元素分析、IR 和多核 NMR 光谱以及在三种情况下通过单晶 X 射线衍射进行表征。此外,D 2O 溶解度、在 D 2 O 和细胞培养基中的稳定性以及二铁配合物的辛醇-水分配系数通过光谱法测定。在致瘤性 A2780 和 A2780cisR 以及非致瘤性 HEK 293T 细胞系中评估了复合物的细胞毒性。一些复合物表现出高效力和克服 A2780cisR 细胞耐药性的能力(阿司匹林复合物)或相对于 HEK 293T 细胞(苯丁酸氮芥复合物)的高选择性。进一步的研究表明,无论生物活性片段的性质如何,复合物都会显着触发细胞内 ROS 的产生。还进行了 DNA 烷基化和蛋白质结合研究。
更新日期:2021-08-09
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