Fluorescent Copper(II) Bis(thiosemicarbazonates): Synthesis, Structures, Electron Paramagnetic Resonance, Radiolabeling, In Vitro Cytotoxicity and Confocal Fluorescence Microscopy Studies
作者:Sofia I. Pascu、Philip A. Waghorn、Brett W. C. Kennedy、Rory L. Arrowsmith、Simon R. Bayly、Jonathan R. Dilworth、Martin Christlieb、Rex M. Tyrrell、Julia Zhong、Radoslaw M. Kowalczyk、David Collison、Parvinder K. Aley、Grant C. Churchill、Franklin I. Aigbirhio
DOI:10.1002/asia.200900446
日期:2010.3.1
Copperbis(4‐ethyl‐3‐thiosemicarbazonato) acenaphthenequinone (1) and copperbis(4‐methyl‐3‐thiosemicarbazonato) acenaphthenequinone (2) are synthesized and characterized in solution, in the solid state, and radiolabeled. Serum‐protein binding radioassays show good stability in solution and about 25 % binding to protein over 1 h, which is comparable with the hypoxia selective tracer [64Cu(ATSM)]. Cyclic
双(4-乙基-3-氨基硫代)苊醌(1)和双(4-甲基-3-氨基硫代)苊醌(2)在溶液、固态和放射性标记中合成和表征。血清蛋白结合放射分析在溶液中显示出良好的稳定性,并且在 1 小时内与蛋白结合率约为 25%,这与缺氧选择性示踪剂 [ 64 Cu(ATSM)]相当。循环伏安法在氧化还原电位下显示出快速且可逆的还原反应,类似于低氧选择性铜化合物的已知值。然而,尽管如此,复合物1在 1 小时的标准测定中并未显示出 HeLa 细胞中的任何缺氧选择性吸收。通过使用 Cu 的固有荧光来研究可能的原因通过共聚焦显微镜确定细胞分布和摄取机制的II复合物。发现复合物仅在非常缓慢的细胞内化(> 1 小时)后才与外部细胞膜结合并均匀分散在细胞质中。在缺氧条件下通过荧光成像未观察到分布的显着变化。细胞质中的定位速率与其 Zn II类似物形成对比,后者已知具有快速的细胞摄取(最多 20 分钟)和在溶酶体和线粒体中的明确定位。1的细胞毒性机制
Microwave gallium-68 radiochemistry for kinetically stable bis(thiosemicarbazone) complexes: structural investigations and cellular uptake under hypoxia
作者:Israt S. Alam、Rory L. Arrowsmith、Fernando Cortezon-Tamarit、Frazer Twyman、Gabriele Kociok-Köhn、Stanley W. Botchway、Jonathan R. Dilworth、Laurence Carroll、Eric O. Aboagye、Sofia I. Pascu
DOI:10.1039/c5dt02537k
日期:——
Hypoxia selectivity of new gallium-68 bis-(thiosemicarbazones) synthesised via microwave heating were investigated.
新合成的镓-68双(硫代脲酮)化合物通过微波加热合成,其缺氧选择性被调查。
Fluorescent gallium and indium bis(thiosemicarbazonates) and their radiolabelled analogues: Synthesis, structures and cellular confocal fluorescence imaging investigations
作者:Rory L. Arrowsmith、Philip A. Waghorn、Michael W. Jones、Andreas Bauman、Simon K. Brayshaw、Zhiyuan Hu、Gabriele Kociok-Köhn、Thomas L. Mindt、Rex M. Tyrrell、Stanley W. Botchway、Jonathan R. Dilworth、Sofia I. Pascu
DOI:10.1039/c1dt10126a
日期:——
New fluorescent and biocompatible aromatic Ga(III)- and In(III)-bis(thiosemicarbazonato) complexes for dual mode optical and PET or SPECT molecular imaging have been synthesised via a synthetic method based on transmetallation reactions from Zn(II) precursors. Complexes have been fully characterised in the solid state by single crystal X-ray diffraction and in solution by spectroscopic methods (UV/Vis, fluorescence, 1H and 13C1H} NMR). The bis(thiosemicarbazones) radiolabelled rapidly in high yields under mild conditions with 111In (a gamma and Auger emitter for SPECT imaging and radiotherapy with t1/2 = 2.8 d) and 68Ga (a generator-available positron emitter for PET imaging with t1/2 = 68 min). Cytotoxicity and biolocalisation studies using confocal fluorescence imaging and fluorescence lifetime imaging (FLIM) techniques have been used to study their in vitro activities and stabilities in HeLa and PC-3 cells to ascertain their suitability as synthetic scaffolds for future multimodality molecular imaging in cancer diagnosis and therapy. The observation that the indium complexes show certain nuclear uptake could be of relevance towards developing 111In therapeutic agents based on Auger electron emission to induce DNA damage.
Synthesis and characterization of new palladium (II) and silver (I) thiosemicarbazone derived by acenaphthenequinone complexes and their antimicrobial activity
作者:Ashraf A. Aly、Elham M. Abdallah、Salwa A. Ahmed、Mai M. Rabee、Olaf Fuhr、Mahmoud A.A. Ibrahim、Hayat Ali Alzahrani、Bahaa G.M. Youssif