Core-modified porphyrins. Part 5: Electronic effects on photophysical and biological properties in vitro
作者:Youngjae You、Scott L. Gibson、Michael R. Detty
DOI:10.1016/j.bmc.2005.07.006
日期:2005.11
to 1 x 10(-5) M. Once irradiated with 5 J cm(-2) of 350-750 nm light, five porphyrins 2, 3, 5, 6, and 8 killed over 80% of R3230AC rat mammary adenocarcinoma cells at 5 x 10(-7) M photosensitizer. Among these five, compound 3 bearing 5-phenyl and 20-(4-fluorophenyl) substituents was the most potent photosensitizer toward R3230AC cells showing 67% cell kill at 1 x 10(-7) M 3. Bulky substituents at the
制备了21,23-二硫卟啉2-11作为5,20-二苯基-10,15-双(4-羧基甲氧基甲氧基)苯基-21,23-二硫卟啉1的类似物,以检查电子特性对5-和20的影响-中位。就吸收光谱,产生单线态氧和荧光的量子产率而言,在介孔环上电子性质的影响并不显着。尽管在正辛醇/ pH 7.4缓冲液分配系数中注意到了一些差异,但在化合物之间,log D(7.4)的对数D(7.4)并未严重影响细胞的摄取或光毒性。浓度高达1 x 10(-5)M的双硫卟啉1-11均未显示出暗毒性。用5 J cm(-2)的350-750 nm光照射后,五种卟啉2、3、5、6 在5 x 10(-7)M光敏剂下,有8例杀死了80%以上的R3230AC大鼠乳腺癌细胞。在这五种化合物中,带有5-苯基和20-(4-氟苯基)取代基的化合物3是对R3230AC细胞最有效的光敏剂,在1 x 10(-7)M 3处显示67%的细胞杀伤力。 20位使光敏剂具有最小的光毒性。