Design, synthesis and SAR studies of novel 1,2-bis(aminomethyl)cyclohexane platinum(II) complexes with cytotoxic activity. Studies of interaction with DNA of iodinated seven-membered 1,4-diaminoplatinocycles
作者:Marina Gay、Ángel M. Montaña、Consuelo Batalla、Juan M. Mesas、María-Teresa Alegre
DOI:10.1016/j.jinorgbio.2014.09.012
日期:2015.1
interaction with DNA of these complexes were performed via three techniques: circular dichroism (CD), electrophoresis on agarose gel (EF) and atomic force microscopy (AFM) in order to evaluate the modifications of secondary and tertiary structure of DNA, induced by platinum complexes. These studies allowed us to correlate the IC50 values of complexes and the intensity of interaction to DNA, the main target
已合成了九种新颖的铂(II)配合物的选定库,这些配合物具有功能不同的带有1,4-二氨基骨架的1,2-双(氨基甲基)环己烷载体配体和碘作为不稳定的配体,并在体外评估了它们的肿瘤细胞生长抑制活性,位于一对人类癌细胞系A2780和A2780cisR的前面。这些细胞系是基于对顺铂耐药性的所有已知主要机制的研究而选择的。与亲代A2780细胞相比,A2780cisR细胞通过减少药物转运,增强的DNA修复/耐受性和增加的谷胱甘肽(GSH)水平而具有抗性。评估的大多数铂络合物均显示出极低的抗性因子,比顺铂低多达16倍,这表明它们具有克服卵巢癌A2780cisR细胞中顺铂耐药性的能力。为了了解几种有机功能的影响,进行了结构活性研究(CC双键,游离OH基,MeO基等)和立体化学对细胞毒性的影响。此外,还通过以下三种技术研究了这些复合物与DNA的相互作用:圆二色性(CD),琼脂糖凝胶电泳(EF)和原子力显微镜(