We analyzed the apoptosis and anti-tumour activities of several MnIII-salen and -salphen complexes (1–14) towards three different cultured human cancer and non-cancer cells. We demonstrated that most of the MnIII-salen and -salphen complexes affect cell viability and induce apoptosis in MCF7 cells. Biochemically active MnIII-salen and -salphen complexes induced nuclear fragmentation and release of cytochrome c from the mitochondria to cytosol indicating involvement of mitochondrial pathway of apoptosis. The nature and position of the substituents and the bridging group on the salen ligands play crucial roles in determining the apoptotic activities of MnIII-salen and -salphen complexes. The IC50 values for the active MnIII-salen complexes ranged between 12 and 55 μM. For MnIII-salen complexes with ethylenediamine bridges, methoxy substituted complexes were more active than the corresponding hydroxy derivatives. However, this correlation does not hold when the bridging group was changed from ethylenediamine to o-phenylenediamine. Importantly, several MnIII-salen and -salphen complexes showed about 2–3 fold selectivity toward cancer cells such as MCF7 (breast cancer), and CCL228 (colon cancer) over a normal non-malignant cell MCF10 (breast epithelial cells) indicating their potential application towards novel anti-tumour therapy.
我们分析了几种
锰Ⅲ-盐
硒和盐
酚复合物(1-14)对三种不同培养的人类癌细胞和非癌细胞的凋亡和抗肿瘤活性。我们发现,大多数
锰Ⅲ-盐
硒和盐
酚复合物都会影响 MCF7 细胞的活力并诱导其凋亡。具有生化活性的 MnIII 盐和 -salphen 复合物可诱导细胞核破碎,并将细胞色素 c 从线粒体释放到细胞膜,这表明线粒体参与了细胞凋亡的途径。
沙林配体上取代基和桥接基的性质和位置在决定
锰Ⅲ-
沙林和-
沙林复合物的凋亡活性方面起着至关重要的作用。具有活性的 MnIII-salen复合物的 IC50 值介于 12 到 55 μM 之间。对于具有
乙二胺桥的 MnIII-salen复合物,甲氧基取代的复合物比相应的羟基衍
生物更有活性。然而,当桥基从
乙二胺变为
邻苯二胺时,这种相关性就不成立了。重要的是,与正常非恶性细胞 MCF10(乳腺上皮细胞)相比,几种
锰Ⅲ-盐基和盐基复合物对 MCF7(乳腺癌)和 CC
L228(结肠癌)等癌细胞具有约 2-3 倍的选择性,这表明它们有可能应用于新型抗肿瘤疗法。