A series of novel silicon(IV) phthalocyanines conjugated axially with different nucleoside moieties (uridine, 5-methyluridine, cytidine, and 5-N-cytidine derivatives) have been synthesized and evaluated for their photodynamic activities. The uridine-containing compound 1 exhibits the highest photocytotoxicity against HepG2 human hepatocarcinoma cells with an IC50 value as low as 6 nM, which can be attributed to its high cellular uptake and non-aggregated nature in the biological media. This compound shows high affinity toward the mitochondria of HepG2 cells and causes cell death mainly through apoptosis upon illumination. The result indicates that 1 is a highly promising photosensitizer for photodynamic therapy.
一系列新颖的
硅(IV)
酞菁化合物轴向共轭了不同的核苷酸基团(
尿苷、
5-甲基尿苷、
胞苷及其5-N-衍
生物)已经被合成并评价了它们的光动力活性。含
尿苷的化合物1对人类肝癌细胞HepG2显示出最高的细胞光毒性,IC50值低至6nM,这可以归因于其高效的细胞摄取和在
生物介质中的非聚集特性。该化合物对HepG2细胞的线粒体显示出高度亲和性,并在光照下主要通过凋亡途径诱导
细胞死亡。结果表明,1是一种极具前景的光敏剂,适用于光动力疗法。