Structural Factors and Mechanisms Underlying the Improved Photodynamic Cell Killing with Silicon Phthalocyanine Photosensitizers Directed to Lysosomes<i>Versus</i>Mitochondria
作者:Myriam E. Rodriguez、Ping Zhang、Kashif Azizuddin、Grace B. Delos Santos、Song-mao Chiu、Liang-yan Xue、Jeffery C. Berlin、Xinzhan Peng、Hongqiao Wu、Minh Lam、Anna-Liisa Nieminen、Malcolm E. Kenney、Nancy L. Oleinick
DOI:10.1111/j.1751-1097.2009.00558.x
日期:2009.9
triggered. A series of analogs of Pc 4 were synthesized, and the results demonstrate that Pcs with the aminopropylsiloxy ligand of Pc 4 or a similar one on one side of the Pc ring and a second large axial ligand on the other side of the ring have unexpected properties, including enhanced cell uptake, greater monomerization resulting in greater intracellular fluorescence and three‐fold higher affinity
酞菁光敏剂 Pc 4 已显示优先结合线粒体和内质网膜。在对负载 Pc 4 的细胞进行光照射后,膜成分,尤其是 Bcl-2,会受到光损伤,并引发细胞凋亡,如 caspase-3 的激活和聚(ADP-核糖)聚合酶的裂解所表明的那样。合成了一系列 Pc 4 的类似物,结果表明在 Pc 环的一侧具有氨基丙基甲硅烷氧基配体或类似配体的 Pcs 和环另一侧的第二个大轴向配体的 Pcs 具有意想不到的特性,包括增强的细胞摄取、更大的单体化导致更大的细胞内荧光和三倍高的脂质体亲和力常数。含羟基的轴向配体倾向于减少 Pc 的聚集并将其引导至溶酶体,导致细胞杀伤(由克隆形成性丧失所定义)是 Pc 4 的四到六倍。而 Pc 4-PDT 光损伤 Bcl- 2 和 Bcl-xL,Pc 181-PDT 在与细胞杀伤相同的剂量反应范围内对 Bcl-2 造成的光损伤要小得多,Bid 裂解较早,caspase-3 依赖性细