The synthesis and characterization of two 18-crown-6 functionalized analogues of an extensively studied gadolinium texaphyrin derivative, motexafin gadolinium (1, MGd), are reported. These are the monomeric and dimeric species, compounds 2 and 3, respectively. Both crown ether functionalized species proved to be stable at physiological pH and revealed distinct shifts in the UV spectrum when treated with sodium-, potassium-, ammonium- or zinc(II)-salts. Zinc(II) is believed to play a major role regulating apoptosis mechanisms in cancerous cells. Therefore, cytotoxicity studies of 2 and 3 were carried out using the Ramos cell line in the presence and absence of zinc(II).
本研究报道了一种经过广泛研究的钆特沙芬衍生物--莫特沙芬钆(1,MGd)的两种 18 冠 6 官能化类似物的合成和表征。它们分别是单体和二聚体化合物 2 和 3。事实证明,这两种冠醚官能化物种在生理 pH 值条件下都很稳定,并且在钠盐、钾盐、铵盐或锌盐(II)处理时,紫外光谱会发生明显的偏移。锌(II)被认为在调节癌细胞凋亡机制方面发挥着重要作用。因此,我们使用拉莫斯细胞系,在锌盐(II)存在和不存在的情况下,对 2 和 3 进行了细胞毒性研究。