Details

Autor(en) / Beteiligte

• Liu, Guanshu
• Moake, Matthew
• Har-el, Yah-el
• Long, Chris M.
• Chan, Kannie W.Y.
• Cardona, Amanda
• Jamil, Muksit
• Walczak, Piotr
• Gilad, Assaf A.
• Sgouros, George
• van Zijl, Peter C.M.
• Bulte, Jeff W.M.
• McMahon, Michael T.

Titel

In vivo multicolor molecular MR imaging using diamagnetic chemical exchange saturation transfer liposomes

Ist Teil von

• Magnetic resonance in medicine, 2012-04, Vol.67 (4), p.1106-1113

Ort / Verlag

Hoboken: Wiley Subscription Services, Inc., A Wiley Company

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• A variety of (super)paramagnetic contrast agents are available for enhanced MR visualization of specific tissues, cells, or molecules. To develop alternative contrast agents without the presence of metal ions, liposomes were developed containing simple bioorganic and biodegradable compounds that produce diamagnetic chemical exchange saturation transfer MR contrast. This diamagnetic chemical exchange saturation transfer contrast is frequency‐dependent, allowing the unique generation of “multicolor” images. The contrast can be turned on and off at will, and standard images do not show the presence of these agents. As an example, glycogen, L‐arginine, and poly‐L‐lysine were encapsulated inside liposomes and injected intradermally into mice to image the lymphatic uptake of these liposomes. Using a frequency‐dependent acquisition scheme, it is demonstrated that multicolor MRI can differentiate between different contrast particles in vivo following their homing to draining lymph nodes. Being nonmetallic and bioorganic, these diamagnetic chemical exchange saturation transfer liposomes form an attractive novel platform for multicolor imaging in vivo. Magn Reson Med, 2011. © 2011 Wiley‐Liss, Inc.