Monoterpenes as Drug Shuttles: Cytotoxic (6-Aminomethylnicotinate)dichloridoplatinum(II) Complexes with Potential To Overcome Cisplatin Resistance
作者:Rainer Schobert、Bernhard Biersack、Andrea Dietrich、Antje Grotemeier、Thomas Müller、Bernd Kalinowski、Sebastian Knauer、Wieland Voigt、Reinhard Paschke
DOI:10.1021/jm061379o
日期:2007.3.1
(6-Aminomethylnicotinate)dichloridoplatinum(II) complexes 4 esterified with terpene alcohols were tested on a panel of five human tumor cell lines. While they were accumulated in all cell lines more readily than cisplatin (CDDP), their cytotoxicities were tumor-specific and structure-dependent. Cell lines known to feature elevated levels of antiapoptotic, ion-channel-affecting proteins or otherwise impaired caspase-9 activation responded better to 4 than to CDDP, e.g., the HL-60 leukemia to the fenchyl and bornyl derivatives 4a,b at an IC90 <= 10 mu M. The (-)-menthyl complex 4g was far better accumulated and more efficacious in CDDP-resistant 1411HP male germ cell tumor cells than in the congenerous CDDP-sensitive H12.1 cell line. 4g also broke the CDDP resistance of 518A2 melanoma cells. Cell decay in each case was apoptotic as to TUNEL and Annexin V fluorescence assays. Some complexes 4 seem to positively modulate the permeability of the cell membrane and of blocked mitochondrial anion channels.
6-氨基甲基烟酸酯与单萜醇酯化的铂(II)双氯化物复合物4,在五个肿瘤细胞系的测试中表现出更高的积累能力,但其细胞毒性呈现肿瘤特异性和结构依赖性。具有较高抗凋亡或离子通道调节蛋白表达的细胞系,对复合物4的反应优于顺铂。例如, HL-60白血病细胞对4a,b的半抑制浓度低于10 μM。反薄荷基复合物4g在CDDP耐药的1411HP细胞中积累更好且效力更高,较之CDDP敏感的H12.1细胞表现优异。4g亦可逆转518A2黑素瘤细胞的CDDP耐药性。多项凋亡检测显示细胞死亡为凋亡途径。部分复合物4可能通过调节细胞膜和线粒体通道的通透性,增强药物效应。