Identification of differential anti-neoplastic activity of copper bis(thiosemicarbazones) that is mediated by intracellular reactive oxygen species generation and lysosomal membrane permeabilization
作者:Christian Stefani、Zaynab Al-Eisawi、Patric J. Jansson、Danuta S. Kalinowski、Des R. Richardson
DOI:10.1016/j.jinorgbio.2015.08.010
日期:2015.11
and disubstituted bis(thiosemicarbazones). This alkyl substitution pattern governed their: (1) CuII/I redox potentials; (2) ability to induce cellular 64Cu release; (3) lipophilicity; and (4) anti-proliferative activity. The potent anti-cancer Cu complex of the unsubstituted bis(thiosemicarbazone) analog, glyoxal bis(4-methyl-3-thiosemicarbazone) (GTSM), generated intracellular reactive oxygen species
双(硫代半脲)及其铜(Cu)配合物具有独特的抗肿瘤特性。但是,它们的作用机理仍不清楚。我们检查了十二个双(硫代半氨基甲酮)的结构-活性关系,以阐明有关其抗癌功效的因素。重要的是,在配体主链的二亚胺位置上的烷基取代产生两个不同的基团,即未取代/单取代和二取代的双(硫代半咔唑酮)。这种烷基取代模式控制着它们:(1)Cu II / I氧化还原电势;(2)诱导细胞64的能力铜释放;(3)亲脂性;(4)抗增殖活性。未取代的双(硫代半碳zone酮)类似物乙二醛双(4-甲基-3-硫代半碳zone酮)(GTSM)的有效抗癌铜络合物可生成细胞内活性氧(ROS),并通过非螯合的铜螯合作用而减弱有毒的铜螯合剂四硫代钼酸盐和抗氧化剂N-乙酰-1-半胱氨酸。荧光显微镜显示,Cu(GTSM)的抗癌活性部分归因于溶酶体膜通透性(LMP)。这项研究首次凸显了ROS和LMP在双(硫代半脲酮)的抗癌活性中的作用。