Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Smaller and Sharper

Abstract:
Nanoscale Metal-Organic Frameworks (NMOFs) as MRI Contrast Agents

Smaller and Sharper

Weinheim, Germany | Posted on July 8th, 2010

Developing more sensitive methods of biomedical imaging that are effective with minimal amounts of contrast agents is an important challenge in the early and accurate diagnosis of illnesses. A new class of materials that appear promising in this quest were introduced in 2006 by Prof. Wenbin Lin of the University of North Carolina at Chapel Hill. Ever since, this emerging area has been growing rapidly as new materials with improved properties are discovered. Wenbin Lin and Joseph Della Rocca present the progress in this field in the Microreview published in the European Journal of Inorganic Chemistry.

Magnetic resonance imaging (MRI) is a noninvasive technique based on the detection of nuclear spin reorientations in a magnetic field, which, however, is relatively insensitive and typically relies on large doses of administered contrast agents to distinguish adequately between normal and diseased tissues. Nanoscale Metal-Organic Frameworks (NMOFs) are combinations of metals and organic molecules on the nanoscale that provide unlimited possibilities for designing task-specific molecules. They are intrinsically biodegradable, and their high porosity makes them ideal for targeted delivery of entrapped agents. They can be specifically targeted to certain regions of the body. In addition to a wealth of applications in other fields, these properties make NMOFs also very suitable for use in biological systems and in particular as more effective contrast agents at lower doses. In addition to Gd carboxylate materials, NMOFs based on Fe, Mn, and Zn were investigated. Coatings such as amorphous silica, biocompatible polymers, and polyoxometalate-peptide hybrid spheres were used to enhance the stability, dispersibility, and biocompatibility of NMOFs. Furthermore, some systems doped with lanthanides were studied as potential multimodal contrast agents.

The in vivo and in vitro effectiveness of these agents has been demonstrated. For example, iron carboxylate NMOFs modified with biocompatible polymers were used for imaging the liver and spleen of Wistar rats. Silica-coated, peptide-targeted Mn NMOFs were shown to be selectively taken up by a human colon cancer cell line in vitro. Finally, a versatile iron carboxylate system post-synthetically modified to contain a fluorophore or a chemotherapeutic showed strong fluorescence upon release from the framework and exhibited cytotoxicity comparable to cisplatin against colon cancer cells.

Author: Wenbin Lin, University of North Carolina, Chapel Hill (USA), www.unc.edu/~wlin/

Title: Nanoscale Metal-Organic Frameworks: Magnetic Resonance Imaging Contrast Agents and Beyond

European Journal of Inorganic Chemistry, Permalink to the article: dx.doi.org/10.1002/ejic.201000496

####

For more information, please click here

Copyright © European Journal of Inorganic Chemistry

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Texas A&M Chemist Says Trapped Electrons To Blame For Lack Of Battery Efficiency: Forget mousetraps — today’s scientists will get the cheese if they manage to build a better battery June 28th, 2016

Building a smart cardiac patch: 'Bionic' cardiac patch could one day monitor and respond to cardiac problems June 28th, 2016

New, better way to build circuits for world's first useful quantum computers June 28th, 2016

Yale researchers’ technology turns wasted heat into power June 27th, 2016

Possible Futures

Texas A&M Chemist Says Trapped Electrons To Blame For Lack Of Battery Efficiency: Forget mousetraps — today’s scientists will get the cheese if they manage to build a better battery June 28th, 2016

Building a smart cardiac patch: 'Bionic' cardiac patch could one day monitor and respond to cardiac problems June 28th, 2016

New, better way to build circuits for world's first useful quantum computers June 28th, 2016

Yale researchers’ technology turns wasted heat into power June 27th, 2016

Academic/Education

JPK’s NanoWizard® AFM and ForceRobot® systems are being used in the field of medical diagnostics in the Supersensitive Molecular Layer Laboratory of POSTECH in Korea June 21st, 2016

Weizmann Institute of Science Presents: Weizmann Wonder Wander - 4G - is Online June 21st, 2016

NanoLabNL boosts quality of research facilities as Dutch Toekomstfonds invests firmly June 10th, 2016

The Institute for Transfusion Medicine at the University Hospital of Duisburg-Essen in Germany uses the ZetaView from Particle Metrix to quantify extracellular vesicles June 7th, 2016

Nanomedicine

Building a smart cardiac patch: 'Bionic' cardiac patch could one day monitor and respond to cardiac problems June 28th, 2016

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Self-assembling icosahedral protein designed: Self-assembling icosahedral protein designed June 22nd, 2016

Announcements

Texas A&M Chemist Says Trapped Electrons To Blame For Lack Of Battery Efficiency: Forget mousetraps — today’s scientists will get the cheese if they manage to build a better battery June 28th, 2016

Building a smart cardiac patch: 'Bionic' cardiac patch could one day monitor and respond to cardiac problems June 28th, 2016

New, better way to build circuits for world's first useful quantum computers June 28th, 2016

Yale researchers’ technology turns wasted heat into power June 27th, 2016

Nanobiotechnology

Building a smart cardiac patch: 'Bionic' cardiac patch could one day monitor and respond to cardiac problems June 28th, 2016

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Tailored DNA shifts electrons into the 'fast lane': DNA nanowire improved by altering sequences June 22nd, 2016

Self-assembling icosahedral protein designed: Self-assembling icosahedral protein designed June 22nd, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic