Molecules 2013, 18(8), 9034-9048; doi:10.3390/molecules18089034
Synthesis and Relaxivity Studies of a DOTA-Based Nanomolecular Chelator Assembly Supported by an Icosahedral Closo-B122− -Core for MRI: A Click Chemistry Approach
International Institute of Nano and Molecular Medicine, School of Medicine, University of Missouri, Columbia, MO 65211-3450, USA
*
Author to whom correspondence should be addressed.
Received: 1 July 2013 / Revised: 23 July 2013 / Accepted: 23 July 2013 / Published: 29 July 2013
(This article belongs to the Special Issue Advances in Click Chemistry)
Abstract
An icosahedral closo-B122− scaffold based nano-sized assembly capable of carrying a high payload of Gd3+-chelates in a sterically crowded configuration is developed by employing the azide-alkyne click reaction. The twelve copies of DO3A-t-Bu-ester ligands were covalently attached to an icosahedral closo-B122− core via suitable linkers through click reaction. This nanomolecular structure supporting a high payload of Gd3+-chelate is a new member of the closomer MRI contrast agents that we are currently developing in our laboratory. The per Gd ion relaxivity (r1) of the newly synthesized MRI contrast agent was obtained in PBS, 2% tween/PBS and bovine calf serum using a 7 Tesla micro MRI instrument and was found to be slightly higher (r1 = 4.7 in PBS at 25 °C) compared to the clinically used MRI contrast agents Omniscan (r1 = 4.2 in PBS at 25 °C) and ProHance (r1 = 3.1 in PBS at 25 °C).Keywords:
click reaction; closo-boranes; MRI contrast agents; relaxivity; gadolinium complexes; DOTA
▼
Figures
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
Scifeed alert for new publications
Never miss any articles matching your research from any publisher- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Share & Cite This Article
MDPI and ACS Style
Goswami, L.N.; Ma, L.; Kueffer, P.J.; Jalisatgi, S.S.; Hawthorne, M.F. Synthesis and Relaxivity Studies of a DOTA-Based Nanomolecular Chelator Assembly Supported by an Icosahedral Closo-B122− -Core for MRI: A Click Chemistry Approach. Molecules 2013, 18, 9034-9048.
Related Articles
Article Metrics
Comments
[Return to top]
Molecules
EISSN 1420-3049
Published by MDPI AG, Basel, Switzerland
RSS
E-Mail Table of Contents Alert