(Arene)Cl2Ru(II) complexes with N-coordinated estrogen and androgen isonicotinates: Interaction with sex hormone binding globulin and anticancer activity
作者:Rainer Schobert、Sebastian Seibt、Katharina Effenberger-Neidnicht、Caroline Underhill、Bernhard Biersack、Geoffrey L. Hammond
DOI:10.1016/j.steroids.2010.12.009
日期:2011.3
(Arene)dichloridoruthenium(II) complexes with N-coordinated isonicotinates of androgens (6) and estrogens (9) were prepared and tested for affinity to the estrogen receptor (ER alpha) and sex hormone binding globulin (SHBG), as well as for cytotoxicity in cancer cells. None of the new complexes bound noticeably to the ER and most of them also bound less strongly to SHBG than the corresponding unmetallated steroids 7. In MTT assays the Ru(p-cymene) complexes 9 of 2-substituted estrones were equally or even more cytotoxic than the metal-free steroids against hormone-dependent (MCF-7 breast and KB-V1 cervix carcinomas) and hormone-independent (518A2 melanoma) cells. The addition of external SHBG to MU assays lowered the cytotoxicities of the complexes 9 and distinctly more so those of some steroids 7, probably by the way of sequestration and reduction of the cellular uptake. In the absence of SHBG the estrogen complexes 9 were internalized by 518A2 melanoma cells and ruthenated their DNA as quantified by ICP-OES. They also ruthenated salmon sperm DNA but did not change the topology of plasmid DNA in EMSA experiments. In addition, the Ru(p-cymene) complex of 2-ethoxyestrone (9c) was shown to reduce the motility of 518A2 melanoma cells in a wound-healing assay. (C) 2010 Elsevier Inc. All rights reserved.
(arene)二氯化二钌(II)复合物与N-配位的雄激素(6)和雌激素(9)的异烟酸酰胺衍生物已被制备,并测试了其对雌激素受体(ERα)和性激素结合球蛋白(SHBG)的亲和力以及在癌细胞中的细胞毒性。新的复合物均未明显结合ER,且其中大多数与SHBG的结合力亦弱于相应的无金属甾体(7)。在MTT实验中,2-取代雌酮的Ru(p-甲乙基环己二烯)复合物(9)对激素依赖性(MCF-7乳腺癌和KB-V1宫颈癌)及激素非依赖性(518A2黑色素瘤)细胞的毒性与金属无甾体相当甚至更高。在加入外源性SHBG至HU实验中,其对复合物9的细胞毒性有所降低,且对某些甾体(7)的降低明显,可能是通过屏蔽及减少胞内摄取的途径实现。在无SHBG的情况下,雌激素复合物9被518A2黑色素瘤细胞摄入,并以ICP-OES定量其DNA的钌化修饰。它们亦能钌化鲑鱼精子DNA,但在EMSA实验中未改变质粒DNA的拓扑结构。此外,2-乙氧雌酮的Ru(p-甲乙基环己二烯)复合物(9c)在划痕修复实验中被证实可显著降低518A2黑色素瘤细胞的迁移能力。(C)2010 Elsevier Inc. 保留所有权利。