scholarly journals Nano-assemblies of cationic mPEG brush block copolymers with gadolinium polyoxotungstate [Gd(W5O18)2]9− form stable, high relaxivity MRI contrast agents

Nanoscale ◽  
2018 ◽  
Vol 10 (15) ◽  
pp. 7270-7280 ◽  
Author(s):  
Joanne Ly ◽  
Yuhuan Li ◽  
Mai N. Vu ◽  
Bradford A. Moffat ◽  
Kevin S. Jack ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Good Stability ◽  
Mri Contrast ◽  
High Relaxivity

Nano-assemblies of gadolinium polyoxotungstate and cationic mPEG brush block copolymer demonstrated good stability and enhanced relaxivity at physiological pH.

scholarly journals Block copolymer-based gadolinium nanoparticles as MRI contrast agents with high T1 relaxivity

Nanomedicine ◽  
2012 ◽  
Vol 7 (2) ◽  
pp. 211-218 ◽  
Author(s):  
Sijian Hou ◽  
Sheng Tong ◽  
Jun Zhou ◽  
Gang Bao
Keyword(s):  
Block Copolymer ◽  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Mri Contrast

ChemInform Abstract: High-Relaxivity MRI Contrast Agents: Where Coordination Chemistry Meets Medical Imaging

ChemInform ◽  
2009 ◽  
Vol 40 (3) ◽  
Author(s):  
Eric J. Werner ◽  
Ankona Datta ◽  
Christoph J. Jocher ◽  
Kenneth N. Raymond
Keyword(s):  
Coordination Chemistry ◽  
Medical Imaging ◽  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Mri Contrast ◽  
High Relaxivity

scholarly journals A Photocleavable Contrast Agent for Light-Responsive MRI

2020 ◽  
Vol 13 (10) ◽  
pp. 296
Author(s):  
Friederike Reeßing ◽  
Sèvrin E. M. Huijsse ◽  
Rudi A. J. O. Dierckx ◽  
Ben L. Feringa ◽  
Ronald J.H. Borra ◽  
...  
Keyword(s):  
Contrast Agent ◽  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Mri Contrast Agent ◽  
Whole Body ◽  
Spatiotemporal Resolution ◽  
Mri Contrast ◽  
High Relaxivity ◽  
Vis Spectroscopy ◽  
Clinical Mri

Thanks to its innocuousness and high spatiotemporal resolution, light is used in several established and emerging applications in biomedicine. Among them is the modulation of magnetic resonance imaging (MRI) contrast agents’ relaxivity with the aim to increase the sensitivity, selectivity and amount of functional information obtained from this outstanding whole-body medical imaging technique. This approach requires the development of molecular contrast agents that show high relaxivity and strongly pronounced photo-responsiveness. To this end, we report here the design and synthesis of a light-activated MRI contrast agent, together with its evaluation using UV–vis spectroscopy, Fast Field Cycling (FFC) relaxometry and relaxometric measurements on clinical MRI scanners. The high relaxivity of the reported agent changes substantially upon irradiation with light, showing a 17% decrease in relaxivity at 0.23T upon irradiation with λ = 400 nm (violet) light for 60 min. On clinical MRI scanners (1.5T and 3.0T), irradiation leads to a decrease in relaxivity of 9% and 19% after 3 and 60 min, respectively. The molecular design presents an important blueprint for the development of light-activatable MRI contrast agents.

Gd(DO3A-N-α-aminopropionate): a versatile and easily available synthon with optimized water exchange for the synthesis of high relaxivity, targeted MRI contrast agents

2009 ◽  
pp. 6475 ◽  
Author(s):  
Miguel F. Ferreira ◽  
André F. Martins ◽  
José A. Martins ◽  
Paula M. Ferreira ◽  
Éva Tóth ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Water Exchange ◽  
Mri Contrast Agents ◽  
Mri Contrast ◽  
High Relaxivity ◽  
Targeted Mri

Supramolecular aggregates from polyacrylates and Gd(iii)-containing cationic surfactants as high-relaxivity MRI contrast agents

2015 ◽  
Vol 6 (9) ◽  
pp. 1521-1526 ◽  
Author(s):  
Yingying Chen ◽  
Qin Zhu ◽  
Yu Tian ◽  
Weijun Tang ◽  
Fei Pan ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Cationic Surfactants ◽  
Mri Contrast Agents ◽  
Sodium Acrylate ◽  
Mri Contrast ◽  
Molecular Weights ◽  
High Relaxivity ◽  
Assembly Behavior ◽  
Supramolecular Aggregates

The assembly behavior of narrowly dispersed poly(sodium acrylate) (PAAS) of different molecular weights with Gd(iii)-containing cationic metallosurfactants (MS) was investigated by DLS, TEM and relaxivity plotting.

scholarly journals Polymeric Gd-DOTA amphiphiles form spherical and fibril-shaped nanoparticle MRI contrast agents

2016 ◽  
Vol 7 (7) ◽  
pp. 4230-4236 ◽  
Author(s):  
Lyndsay M. Randolph ◽  
Clare L. M. LeGuyader ◽  
Michael E. Hahn ◽  
Christopher M. Andolina ◽  
Joseph P. Patterson ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Contrast Agent ◽  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Amphiphilic Block Copolymers ◽  
Mri Contrast Agent ◽  
Mri Contrast

A Gd3+-coordinated polymerizable analogue of the MRI contrast agent Gd-DOTA was used to prepare amphiphilic block copolymers, with hydrophilic blocks composed entirely of the polymerized contrast agent.

Water-Soluble Gadofullerenes:  Toward High-Relaxivity, pH-Responsive MRI Contrast Agents

2005 ◽  
Vol 127 (2) ◽  
pp. 799-805 ◽  
Author(s):  
Éva Tóth ◽  
Robert D. Bolskar ◽  
Alain Borel ◽  
Gabriel González ◽  
Lothar Helm ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Water Soluble ◽  
Ph Responsive ◽  
Mri Contrast ◽  
High Relaxivity

scholarly journals Hybrid Dextran-gadolinium Nano-suitcases as High-relaxivity MRI Contrast Agents

2017 ◽  
Vol 36 (3) ◽  
pp. 391-398 ◽  
Author(s):  
Hao Wang ◽  
Ting-Ting Dai ◽  
Bo-Lun Lu ◽  
Sheng-Li Li ◽  
Qing Lu ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Mri Contrast ◽  
High Relaxivity

Gadolinium complexes of macrocyclic diethylenetriamine-N-oxide pentaacetic acid-bisamide as highly stable MRI contrast agents with high relaxivity

2020 ◽  
Vol 49 (26) ◽  
pp. 8927-8932
Author(s):  
Kehan Xu ◽  
Na Xu ◽  
Beibei Zhang ◽  
Weijun Tang ◽  
Yun Ding ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Contrast Agents ◽  
Mri Contrast Agents ◽  
Resonance Imaging ◽  
Mri Contrast ◽  
Gadolinium Complexes ◽  
High Relaxivity ◽  
Magnetic Resonance Imaging Mri

Macrocyclic gadolinium(iii) complexes with hyphenated-amino-N-oxide (HAO) type ligand structures are designed as efficient magnetic resonance imaging (MRI) contrast agents (CAs) with high relaxivity and stability.

Hyperbranched polyethylenimine based polyamine-N-oxide-carboxylate chelates of gadolinium for high relaxivity MRI contrast agents

RSC Advances ◽  
2016 ◽  
Vol 6 (33) ◽  
pp. 28063-28068 ◽  
Author(s):  
Rulin Xiong ◽  
Likun Cheng ◽  
Yu Tian ◽  
Weijun Tang ◽  
Kehan Xu ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Clinical Applications ◽  
Mri Contrast Agents ◽  
Mri Contrast ◽  
Cytotoxicity Assays ◽  
High Relaxivity

Polydentate amine-N-oxide carboxylates were used as ligands for the formation of Gd(iii) complexes with high relaxivity as MRI contrast agents. Cytotoxicity assays revealed good cytocompatibility of these complexes for clinical applications.

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