Document Detail


An extracellular MRI polymeric contrast agent that degrades at physiological pH.
MedLine Citation:
PMID:  22657107     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Macromolecular contrast agents have the potential to assist magnetic resonance imaging (MRI) due to their high relaxivity, but are not clinically useful because of toxicity due to poor clearance. We have prepared a biodegradable ketal-based polymer contrast agent which is designed to degrade rapidly at physiological pH by hydrolysis, in order to influence its pharmacokinetics, facilitating renal clearance. In vitro, the agent degraded more rapidly at lower pH, with complete fragmentation after 24 h at pH 7.4. In vitro relaxivity measurements showed a direct correlation between molecular weight and relaxivity. We compared our polymer contrast agent with commercially available Magnevist in vivo by MRI imaging, as well as measuring the Gd concentration in blood. Our results show that our polymer contrast agent gives a higher contrast and intensity in the same organs and areas as Magnevist and is cleared from the blood at a similar rate. We aim to improve our polymer contrast agent design to develop it for use as a MRI contrast agent, and explore its use as a platform for other imaging modalities.
Authors:
Eric Schopf; Jagadis Sankaranarayanan; Minnie Chan; Robert Mattrey; Adah Almutairi
Related Documents :
11954867 - Multi-slice ct angiography in the evaluation of patients with acute cerebrovascular dis...
21697767 - In vivo intervertebral disc characterization using magnetic resonance spectroscopy and ...
8242997 - Surgical clip artefact mimicking arterial stenosis: a problem with magnetic resonance a...
12210937 - Three-dimensional spiral mr imaging: application to renal multiphase contrast-enhanced ...
2339257 - Radiological and computed tomographic studies of the width of the normal hip joint in m...
17317977 - Integration of functional imaging in radiosurgery: the example of pet scan.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-2
Journal Detail:
Title:  Molecular pharmaceutics     Volume:  -     ISSN:  1543-8392     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101197791     Medline TA:  Mol Pharm     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Conservation and divergence between cytoplasmic and muscle-specific actin capping proteins: insights...
Next Document:  Isolation and identification of mycobacteria from captive reptiles.