Synthesis, in vitro progesterone receptors affinity of gadolinium containing mifepristone conjugates and estimation of binding sites in human breast cancer cells
摘要:
Novel gadolinium-based mifepristone conjugates were synthesised using various synthetic routes. Moderate antiprogestagenic activity of the new conjugates was observed in human breast cancer cells (T47-D cells) using AP (alkaline phosphatase) assay. The amount of incorporated Gd determined by inductively coupled plasma mass spectroscopy (ICPMS) indicates the number of binding sites per cell. These conjugates might be important compounds to develop receptor-targeted MRI contrast agents as well as other anti-breast cancer therapeutics. (C) 2010 Elsevier Ltd. All rights reserved.
Strategies for labeling proteins with PARACEST agents
作者:Olga Vasalatiy、Piyu Zhao、Mark Woods、Andrei Marconescu、Aminta Castillo-Muzquiz、Philip Thorpe、Garry E. Kiefer、A. Dean Sherry
DOI:10.1016/j.bmc.2010.06.026
日期:2011.2
Reactive surface lysine groups on the monoclonal antibody (3G4) and on human serumalbumin (HSA) were labeled with two different PARACEST chelates. Between 7.4 and 10.1 chelates were added per 3G4 molecule and between 5.6 and 5.9 chelates per molecule of HSA, depending upon which conjugation chemistry was used. The immunoreactivity of 3G4 as measured by ELISA assays was highly dependent upon the number
Methods, compounds, compositions and kits that relate to pretargeted delivery of diagnostic and therapeutic agents are disclosed. In particular, methods for radiometal labeling of biotin, as well as related compounds, are described. Articles of manufacture useful in pretargeting methods are also discussed.
Synthesis and Relaxometric Studies of a Dendrimer-Based pH-Responsive MRI Contrast Agent
作者:M. Meser Ali、Mark Woods、Peter Caravan、Ana C. L. Opina、Marga Spiller、James C. Fettinger、A. Dean Sherry
DOI:10.1002/chem.200800402
日期:2008.8.18
The synthesis of a bifunctional pH responsive agent is reported. As part of that synthetic pathway we examine the Ing-Manske reaction, identifying an undesirable by-product and establishing effective conditions for promoting a clean and effective reaction. Reaction of the bifunctional pH responsive agent with a G5-PAMAM dendrimer yielded a product with an average of 96 chelates per dendrimer. The relaxivity
The effect of regioisomerism on the coordination chemistry and CEST properties of lanthanide(III) NB-DOTA-tetraamide chelates
作者:Jacqueline R. Slack、Mark Woods
DOI:10.1007/s00775-013-1060-y
日期:2014.2
isomeric square antiprismatic chelates; each of these chelates was found to have different water exchange and CEST characteristics. The position of a nitrobenzyl substituent on the macrocyclic ring strongly influenced the way in which the chelate and Ln3+ coordination cage distorted. These differential distortions were found to affect the rate of water proton exchange in the chelates. But, by far the greatest
Towards the Rational Design of MRI Contrast Agents: δ-Substitution of Lanthanide(III) NB-DOTA-Tetraamide Chelates Influences but Does Not Control Coordination Geometry
作者:Christiane E. Carney、Anh D. Tran、Jing Wang、Matthias C. Schabel、A. Dean Sherry、Mark Woods
DOI:10.1002/chem.201101007
日期:2011.9.5
LnDOTA‐tetraamide chelates is an important goal. In this study we investigate the potential to extend conformational control of LnDOTA‐type ligands to those applicable to PARACEST. Furthermore, the question of whether δ‐ rather than α‐substitution of the pendant arms could be used to control the chelatecoordinationgeometry is addressed. Although δ‐substitution doesinfluencecoordinationgeometry it does not afford