Design, Synthesis and In-Vitro Cytotoxicity of Novel Platinum (II) Complexes with Phthalate as the Leaving Group
作者:Rajiv Sharma、Ravindra Rawal、Manav Malhotra、Tripti Gaba、A. Sharma、T. Bhardwaj
DOI:10.2174/15701808113109990018
日期:2013.9.1
Three platinum (II) complexes (6-8) with phthalate as the leaving group were synthesized and characterized by FTIR,
1H NMR, 13C NMR, mass spectrometry and elemental analysis. In-vitro cytotoxicity of all three complexes was evaluated
using COLO 205 (human colon cancer cell line) against the parent drug “oxaliplatin”. The compound 4-amino-(transcyclohexane-
1,2-diamine) platinum(II) (8) showed potent cytotoxicity with IC50 = 0.12 µM as compared to oxaliplatin (IC50 =
0.19 µM) and its aqueous solubility was found to be 16 mg/mL which is higher than oxaliplatin (8 mg/mL). The acute toxicity
showed that the platinum complex (8) was less toxic than oxaliplatin. Molecular oxaliplatin-DNA complex structure indicates
that the diaminocyclohexane (DACH) and Pt (II) showed interactions with N7 and O6 of GG base pairs of DNA helix.
In this present study, it is interesting to note that all three platinum based anticancer agents with phthalate as the leaving group
exhibited great cytotoxicity, less toxicity, good lipophilicity as well as better aqueous solubility.
合成并表征了三种以邻苯二甲酸酯为离去基团的铂(II)配合物(6-8),采用了FTIR、1H NMR、13C NMR、质谱和元素分析。所有三种配合物的体外细胞毒性使用COLO 205(人结肠癌细胞系)与母药“奥沙利铂”进行了评估。化合物4-氨基-(反式环己烷-1,2-二胺)铂(II)(8)显示出强大的细胞毒性,IC50 = 0.12 µM,相较于奥沙利铂(IC50 = 0.19 µM),其水溶性为16 mg/mL,显著高于奥沙利铂(8 mg/mL)。急性毒性显示铂配合物(8)的毒性低于奥沙利铂。分子奥沙利铂-DNA配合物结构表明,二氨基环己烷(DACH)和Pt(II)与DNA螺旋中GG碱基对的N7和O6发生了相互作用。在本研究中,值得注意的是,所有三种以邻苯二甲酸酯为离去基团的铂类抗癌药物均显示出较强的细胞毒性、较低的毒性、良好的脂溶性和更好的水溶性。