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Magneto-structural correlation, antioxidant, DNA interaction and growth inhibition activities of new chloro-bridged phenolate complexes

机译:新型氯桥酚盐配合物的磁结构相关性,抗氧化剂,DNA相互作用和生长抑制活性

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A new class of chloro-bridged dinuclear nickel(II) and copper(II) phenolate complexes (1-8) were synthesized from 4-substituted-2-((2-(piperazin-1-yl)ethylimino)methyl)phenols (L1-4) and characterized. The XRD analysis of complexes 4 and 8 shows two mononuclear units connected through a bridged chlorine atom that gives dinuclear complexes. The stability of the complexes has been determined using a spectrophotometric method. Complexes 5-8 possess significant antioxidant activity against the DPPH radical. The binding studies of complexes with CT-DNA suggest partial intercalative/electrostatic interaction and the cleavage ability for pBR322 DNA shows the involvement of the hydroxyl radical as an intermediate in the cleavage reaction. The IC50 value of complexes 2, 6 and 8 against the HepG2 cell line is comparable with that of cisplatin. To find the extent of nuclear chromatin cleavage, propidium iodide staining and comet assays were employed. Among the newly synthesized complexes, copper(II) complexes exhibited superior biological activity when compared to their nickel(II) analogues.
机译:从4-取代的-2-(((2-(哌嗪-1-基)乙基亚氨基)甲基]苯酚()合成了新型的氯桥联双核镍(II)和铜(II)酚盐配合物(1-8)。 L1-4)和特征。配合物4和8的XRD分析表明,两个单核单元通过桥连的氯原子连接,从而得到双核配合物。配合物的稳定性已使用分光光度法确定。配合物5-8对DPPH自由基具有显着的抗氧化活性。对复合物与CT-DNA的结合研究表明存在部分插入/静电相互作用,对pBR322 DNA的裂解能力表明羟基自由基参与了裂解反应。配合物2、6和8对HepG2细胞系的IC50值可与顺铂媲美。为了发现核染色质的裂解程度,采用了碘化丙锭染色和彗星试验。在新合成的络合物中,铜(II)络合物与其镍(II)类似物相比具有更好的生物活性。

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