Gold(i) complexes of water-soluble diphos-type ligands: Synthesis, anticancer activity, apoptosis and thioredoxin reductase inhibition
作者:Corinna Wetzel、Peter. C. Kunz、Matthias U. Kassack、Alexandra Hamacher、Philip Böhler、Wim Watjen、Ingo Ott、Riccardo Rubbiani、Bernhard Spingler
DOI:10.1039/c1dt10368g
日期:——
Gold(I) complexes of imidazole and thiazole-based diphos type ligands were prepared and their potential as chemotherapeutics investigated. Depending on the ligands employed and the reaction conditions complexes [L(AuCl)2] and [L2Au]X (X = Cl, PF6) are obtained. The ligands used are diphosphanes with azoyl substituents R2P(CH2)2PR2 R = 1-methylimidazol-2-yl (1), 1-methylbenzimidazol-2-yl (4), thiazol-2-yl (5) and benzthiazol-2-yl (6)} as well as the novel ligands RPhP(CH2)2PRPh R = 1-methylimidazol-2-yl (3)} and R2P(CH2)3PR2 R = 1-methylimidazol-2-yl (2)}. The cytotoxic activity of the complexes was assessed against three human cancer cell lines and a rat hepatoma cell line and correlated to the lipophilicity of the compounds. The tetrahedral gold complexes [(3)2Au]PF6 and [(5)2Au]PF6 with intermediate lipophilicity (logD7.4 = 0.21 and 0.25) showed significant cytotoxic activity in different cell lines. Both compounds induce apoptosis and inhibit the enzymes thioredoxin reductase and glutathione reductase.
研究人员制备了咪唑和噻唑二磷配体的金(I)配合物,并对其作为化疗药物的潜力进行了研究。根据所用配体和反应条件的不同,可以得到[L(AuCl)2]和[L2Au]X(X = Cl,PF6)配合物。使用的配体是带有偶氮取代基 R2P(CH2)2PR2 R = 1-甲基咪唑-2-基(1),1-甲基苯并咪唑-2-基(4)、噻唑-2-基 (5) 和苯并噻唑-2-基 (6)} 以及新型配体 RPhP(CH2)2PRPh R = 1-甲基咪唑-2-基 (3)} 和 R2P(CH2)3PR2 R = 1-甲基咪唑-2-基 (2)}。评估了这些配合物对三种人类癌细胞系和一种大鼠肝癌细胞系的细胞毒性活性,并将其与化合物的亲脂性联系起来。具有中等亲油性(logD7.4 = 0.21 和 0.25)的四面体金配合物 [(3)2Au]PF6 和 [(5)2Au]PF6 在不同细胞系中显示出显著的细胞毒性活性。这两种化合物都能诱导细胞凋亡并抑制硫代氧化还原酶和谷胱甘肽还原酶。