作者:Raymond Bergeron、Shailendra Singh、Neelam Bharti、Yi Jiang
DOI:10.1055/s-0030-1258245
日期:2010.11
Iron chelators have been shown to control the growth of cancer cells in culture by sequestering exogenous iron in the media. Thus, the ligands prevent cellular access to the metal. However, because transferrin provides iron to tumor cells in animals, chelators have not been effective antitumor agents. Polyamine chelator conjugates in which the polyamine vectored ligands into cells were far more active than the free chelators themselves. However, the free ligands were not released from the vector once in the cell. The current study focuses on the synthesis and preliminary evaluation of a polyamine chelator conjugate capable of releasing the free ligand intracellularly via a nonspecific esterase.
铁螯合剂通过在培养基中封存外源铁来控制癌细胞的生长。因此,配体可阻止细胞获得金属。然而,由于动物体内的转铁蛋白能为肿瘤细胞提供铁,因此螯合剂并不是有效的抗肿瘤药物。多胺螯合剂轭合物中的多胺可将配体导向细胞,其活性远高于游离螯合剂本身。然而,游离配体一旦进入细胞就不会从载体中释放出来。本研究的重点是合成一种多胺螯合剂共轭物并对其进行初步评估,这种共轭物能够通过一种非特异性酯酶在细胞内释放游离配体。