Synthesis of 2-aminobenzophenone-based Schiff base Pd(II) complexes: Investigation on crystal structure, biological behavior of DNA/protein-binding, molecular docking, andin vitroanticancer activities
Synthesis of 2-aminobenzophenone-based Schiff base Pd(II) complexes: Investigation on crystal structure, biological behavior of DNA/protein-binding, molecular docking, andin vitroanticancer activities
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2-氨基二苯甲酮席夫碱钯(II)配合物的合成：晶体结构、DNA/蛋白质结合生物学行为、分子对接和体外抗癌活性研究
DOI：
10.1002/aoc.5856
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发表时间：
2020
影响因子：
3.9
通讯作者：
Wang Wen-Long
中科院分区：
文献类型：
--
作者：
Satheeshkumar Rajendran;Wu Jing;Ch;rasekaran Rajamanickam;Revathi Kannan;Sparkes Hazel A.;Wang Wen-Long
合成了两个新的单硼双齿配体及其钯（Ⅱ）配合物，并通过分析和光谱方法进行了表征。配合物的结构通过单晶X射线衍射进行了确认。已经进行并描述了配体和配合物的双分子结合。有趣的是，这两个双齿螯合配体取代所有的三苯基胂和氯离子从金属前体中形成新的配合物，并被发现是近似正方形平面。通过电子光谱和发射光谱技术研究了配体和配合物与小牛胸腺DNA和牛血清白蛋白的相互作用，这表明结合的嵌入模式。众所周知，如果添加的任何化合物通过嵌入与DNA溶液结合，则DNA溶液的粘度会增加，因为当化合物在其间滑动时，由于DNA碱基对的分离增加，该过程会延长DNA螺旋，而部分的非经典嵌入可能使DNA螺旋弯曲（或扭结），这导致长度减少，从而降低其粘度。与此相反，当化合物与DNA凹槽结合或通过部分嵌入时，粘度不会改变，这通过粘度测量和分子对接研究进一步证实。已经发现，所述化合物在没有任何外部试剂的情况下将超螺旋DNA切割成带切口的DNA。配体和配合物对人肺癌（A549）和乳腺癌（MCF7）细胞系的体外细胞毒性研究表明，这两个物种的显着活性。
Two new monobasic bidentate ligands and their Pd(II) complexes have been synthesized and characterized by analytical and spectroscopic methods. The structures of the complexes were confirmed by single‐crystal X‐ray diffraction. The bimolecular binding of the ligands and complexes has been carried out and described. Interestingly, both the bidentate chelating ligands replaced all the triphenyl arsine and chloride ions from the metal precursor in the formation of new complexes and were found to be approximately square planar. The interaction of the ligands and the complexes with calf thymus DNA and bovine serum albumin was studied by electronic and emission spectroscopy techniques, which suggested an intercalation mode of binding. It is well‐known that the viscosity of a DNA solution increases if any compound added binds to it through intercalation because this process lengthens the DNA helix due to the increased separation of the DNA base pairs when the compound slides in between, whereas a partial, nonclassical intercalation could bend (or kink) the DNA helix, which leads to a reduction in length and thereby reducing its viscosity. By contrast, there will be no change in the viscosity when the compounds bind with DNA grooves or by partial intercalation, which was further confirmed by viscosity measurements and molecular docking studies. It has been found that the compounds cleaved supercoiled DNA into nicked DNA without any external agent. Thein vitrocytotoxicity studies of the ligands and complexes against human lung (A549) and breast (MCF7) cancer cell lines showed significant activity for both species.