Thermal behaviour of a few lanthanide complexes of the type ML3(I) [M=Eu, Gd; HL=4,4,4-trifluoro-1-(2-napthyl)-1,3-butanedione and EuL(3)0.5dmm dmm=2,6-dimethylmorpholine(II)], has been investigated. From thermogravimetric (TG) curves, the decomposition pattern of the compounds has been analysed on the basis of mass loss data. The order and activation energy of the thermal decomposition reactions have been elucidated. From differential thermal analysis (DTA) studies, the heat of reaction and rate of thermal decomposition reaction have been enumerated.
[EN] METAL/RADIOMETAL-LABELED PSMA INHIBITORS FOR PSMA-TARGETED IMAGING AND RADIOTHERAPY<br/>[FR] INHIBITEURS DU PSMA MARQUÉS PAR UN MÉTAL/RADIOMÉTAL POUR IMAGERIE ET RADIOTHÉRAPIE CIBLÉES VERS LE PSMA
申请人:UNIV JOHNS HOPKINS
公开号:WO2015171792A1
公开(公告)日:2015-11-12
Low-molecular weight gadolinium (Gd)-based MR contrast agents for PSMA- specific Ti-weighted MR imaging are disclosed. The (Gd)-based MR contrast agents exhibit high binding affinity for PSMA and exhibit specific Ti contrast enhancement at PSMA+ cells. The PSMA-targeted Gd-based MR contrast agents can be used for PSMA- targeted imaging in vivo. 86Y-labeled PSMA-binding ureas also are provided, wherein the PSMA-binding ureas also are suitable for use with other radiotherapeutics.
Chelates of the types Ln(HEDTA)·xH2O and Ba[Ln(DCTA)]2·yH2O have been isolated for neodymium, samarium, europium, gadolinium and yttrium by precipitation with alcohols. X-ray diffraction data show isomorphism within each series of compounds. Magnetic susceptibility data for several of these chelates and the corresponding ethylenediaminetetraacetate chelates indicate that the 4f electrons are not involved
已通过乙醇沉淀分离出钕,sa 、,、 euro,g和钇中的Ln(HEDTA)· x H 2 O和Ba [Ln(DCTA)2 · y H 2 O类型的螯合物。X射线衍射数据显示出各系列化合物内的同构。这些螯合物中的几种和相应的乙二胺四乙酸盐螯合物的磁化率数据表明,4 f电子不参与键的形成。吸收光谱数据证实了这一结论,并进一步表明吸收特性的变化与螯合稳定性之间不存在相关性。红外数据和脱水研究表明,Ln(HEDTA)· x H2种O型化合物,螯合剂占据5个配位位置,水占据6个。
Optimized relaxivity and specificity hepatobiliary MRI contrast agent
申请人:Wong Tak Wing
公开号:US20070116648A1
公开(公告)日:2007-05-24
An adamantane functionalized magnetic resonance imaging (MRI) contrast agent has been synthesized, and shows high liver specificity, prolonged retention time in both the liver and kidneys, the highest relaxivity among clinical contrast agents, high water solubility, thermodynamic stability, signal intensity enhancement, hepatocellular uptake, and low osmolality and toxicity.
Synthesis and Evaluation of Gd<sup>III</sup>-Based Magnetic Resonance Contrast Agents for Molecular Imaging of Prostate-Specific Membrane Antigen
作者:Sangeeta Ray Banerjee、Ethel J. Ngen、Matthew W. Rotz、Samata Kakkad、Ala Lisok、Richard Pracitto、Mrudula Pullambhatla、Zhengping Chen、Tariq Shah、Dmitri Artemov、Thomas J. Meade、Zaver M. Bhujwalla、Martin G. Pomper
DOI:10.1002/anie.201503417
日期:2015.9.7
Magneticresonance (MR) imaging is advantageous because it concurrently provides anatomic, functional, and molecular information. MR molecular imaging can combine the high spatial resolution of this established clinical modality with molecular profiling in vivo. However, as a result of the intrinsically low sensitivity of MR imaging, high local concentrations of biological targets are required to generate
磁共振成像(MR)具有优势,因为它同时提供了解剖,功能和分子信息。MR分子成像可以将这种既定临床模式的高空间分辨率与体内分子谱相结合。但是,由于MR成像固有的低灵敏度,需要高局部浓度的生物靶标才能产生可分辨的MR对比度。我们假设前列腺特异性膜抗原(PSMA)是前列腺癌成像和治疗的有吸引力的靶标,可以作为基于MR的分子成像的合适生物标记。我们已经合成了三种新的基于高亲和力,低分子量Gd III的PSMA靶向造影剂,其中包含一到三种Gd III 每分子螯合。我们评估了这些试剂在溶液,前列腺癌细胞和体内实验模型中的弛豫特性,以证明基于PSMA的MR分子成像的可行性。
Synthesis and Evaluation of Neutral Gd(III), Mn(II) Complexes From DTPA-Bisamide Derivative as Potential MRI Contrast Agents
作者:Zhen-Chuan Liao、Chao-Rui Li、Zheng-Yin Yang
DOI:10.1080/15533174.2014.988820
日期:2016.5.3
strong chelating ligand was synthesized through the modification of DTPA by bioactive 5-fluorouracil derivatives and characterized by means of mass spectra, Fourier transform infrared spectra, elemental analysis, and nuclear magnetic resonance spectroscopy. Its complexes of Gd(III) and Mn(II) were designed as potentialMRIcontrastagents. Thermodynamic stability constant of the complexes indicated that