研究了一系列铂(II)Schiff碱基配合物与c - myc G-四链体DNA的相互作用。复合物[PtL 1a ](1 a ; H 2 L 1a = N,N'-双(水杨基)-4,5-甲氧基-1,2-苯二胺)可在无细胞状态下适度抑制c- myc基因启动子活性通过稳定G-四链体结构来抑制该系统,并可以抑制培养细胞中c- myc癌基因的表达。1a已检查了1a和G-四链体DNA之间的相互作用1 H NMR光谱。通过使用基于计算机的基于结构的药物设计进行铅优化,已构建了基于硅的G四联体DNA模型,用于基于对接的虚拟筛选,从而开发出具有改善抑制活性的新型Schiff铂(II)碱基复合物。已鉴定出复合物[PtL 3 ](3 ; H 2 L 3 = N,N'-双{4- [1-(2-丙基哌啶)氧基]水杨亚基} -4,5-甲氧基-1,2-苯二胺)在虚拟筛选中得分最高。随后制备了该复合物,并在体外进行了实验测试,以证明其稳定或诱导c
已经制备了一系列基于马参部分的新的Ru II Schiff碱复合物。其中包括四种包含Ni II,Pd II或Pt II的柔性单金属Ru II化合物和六个刚性双金属类似物阳离子进入丹参络合位点。稳态发光滴定表明该化合物具有光探针G-四链体(G4)DNA的能力。此外,席夫碱的大量结构变化允许广泛评估配体表面,柔性和电荷对化合物与G4 DNA相互作用的影响。这要归功于圆二色谱熔融分析和生物层干涉法研究,这些研究指出了Ru II Schiff碱基配合物对G4 DNA的高亲和力和良好的选择性。在纤维素用最有前途的化合物进行了研究。观察到化合物在核以及在核仁中的细胞摄取。在黑暗和光照射下,用U2OS骨肉瘤细胞进行细胞活力实验,从而可以测量IC 50值和光指数。他们显示了光照射除了在黑暗中分子的低细胞毒性外,还对药物的活性发挥了重要作用。总之,报告的结果强调了Ru II Schiff碱基复合物作为开发潜在的靶向诊断或治疗化合物的G4
Salphen metal complexes as tunable G-quadruplex binders and optical probes
作者:Nurul H. Abd Karim、Oscar Mendoza、Arun Shivalingam、Alexander J. Thompson、Sushobhan Ghosh、Marina K. Kuimova、Ramon Vilar
DOI:10.1039/c3ra44793f
日期:——
A series of seven new metal complexes (metal = NiII, CuII, PtII and VO2+) with substituted salphen ligands have been prepared and their duplex and G-quadruplex DNA affinities determined. The selectivity of the complexes towards a given DNA topology is dictated by several factors including geometry, overall charge and substitution pattern of the complex. We also show that the two platinum(II)–salphen complexes developed as part of this series are emissive. Confocal microscopy studies were carried out with these two complexes using four different cell lines (CHO, HeLa, U2OS and HepG2). These studies showed that the cell permeability and localization are different for the two probes and highly dependent on the cell line used.
Flexible Ru
<sup>II</sup>
Schiff Base Complexes: G‐Quadruplex DNA Binding and Photo‐Induced Cancer Cell Death
作者:Martin Gillard、Justin Weynand、Hugues Bonnet、Frédérique Loiseau、Anabelle Decottignies、Jérôme Dejeu、Eric Defrancq、Benjamin Elias
DOI:10.1002/chem.202001409
日期:2020.11.2
RuII Schiffbasecomplexes built on the salphen moiety has been prepared. This includes four flexible monometallic RuII compounds and six rigid bimetallic analogues that contain NiII, PdII or PtII cations into the salphen complexation site. Steady state luminescence titrations illustrated the capacity of the compounds to photoprobe G‐quadruplex (G4) DNA. Moreover, the vast array of the Schiff base
已经制备了一系列基于马参部分的新的Ru II Schiff碱复合物。其中包括四种包含Ni II,Pd II或Pt II的柔性单金属Ru II化合物和六个刚性双金属类似物阳离子进入丹参络合位点。稳态发光滴定表明该化合物具有光探针G-四链体(G4)DNA的能力。此外,席夫碱的大量结构变化允许广泛评估配体表面,柔性和电荷对化合物与G4 DNA相互作用的影响。这要归功于圆二色谱熔融分析和生物层干涉法研究,这些研究指出了Ru II Schiff碱基配合物对G4 DNA的高亲和力和良好的选择性。在纤维素用最有前途的化合物进行了研究。观察到化合物在核以及在核仁中的细胞摄取。在黑暗和光照射下,用U2OS骨肉瘤细胞进行细胞活力实验,从而可以测量IC 50值和光指数。他们显示了光照射除了在黑暗中分子的低细胞毒性外,还对药物的活性发挥了重要作用。总之,报告的结果强调了Ru II Schiff碱基复合物作为开发潜在的靶向诊断或治疗化合物的G4
Effects of Metal Coordination Geometry on Stabilization of Human Telomeric Quadruplex DNA by Square-Planar and Square-Pyramidal Metal Complexes
A series of square-planar and square-based pyramidal metal complexes (metal = Ni(2+), Cu(2+), Zn(2+), and V(4+)) with salphen and salen derivatives as ligands have been prepared. The X-ray crystal structures of three of these complexes are reported, giving insight into the geometric properties of the compounds. The interactions of these complexes with duplex and human telomeric quadruplex DNA have
hydrazone compounds 3a–3j were obtained by the condensation reaction of phenazine-1-carboxylic acid hydrazide and the respective aldehyde-containing compound. The structures were characterized by 1H and 13C NMR spectroscopy, MS and single crystal X-ray diffraction. The antitumor activity of the target compounds in vitro (HeLa and A549) was determined by thiazolyl blue tetrazolium bromide. The results showed
吩嗪-1-羧酸中间体由苯胺和2-溴-3-硝基-苯甲酸反应合成。然后将其酯化并与水合肼反应以提供吩嗪-1-羧酸肼。最后,通过吩嗪-1-羧酸酰肼与相应的含醛化合物的缩合反应,得到了10个新的腙化合物3a - 3j。通过1 H 和13 C NMR 光谱、MS 和单晶 X 射线衍射表征结构。目标化合物(HeLa和A549)的体外抗肿瘤活性通过噻唑蓝四唑溴化物测定。结果表明化合物( E ) -N'-(2-hydroxy-4-(2-(piperidine-1-yl) ethoxy) benzyl) phenazine-1-carbonyl hydrazide 3d表现出良好的细胞毒活性。
A Redox-Activated G-Quadruplex DNA Binder Based on a Platinum(IV)-Salphen Complex
There has been increasing interest in the development of smallmolecules that can selectively bind to G‐quadruplex DNA structures. The latter have been associated with a number of key biological processes and therefore are proposed to be potential targets for drug development. Herein, we report the first example of a reduction‐activated G‐quadruplex DNA binder. We show that a new octahedral platinum(IV)–salphen