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Powder to enhance NMR signals

Date:
December 12, 2013
Source:
Lyon Science Transfert - Université de Lyon
Summary:
Coupled with Nuclear Magnetic Resonance, Dynamic Nuclear Polarization shows strong advantages over "classical" NMR. Unfortunately, Magnetic Resonance Imaging using DNP cannot be generalized to human diagnosis as polarizing agents. This technical hurdle is now fixed thanks to an European collaboration that developed an innovative powder which can open perspectives for the fast characterization of complex systems but also in the field of medical imaging for early cancer diagnosis using MRI.
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Nuclear Magnetic Resonance (NMR) Spectroscopy is an extremely powerful non-destructive technique for the characterization of molecules. Widely used by chemists from its origin, it is now essential in the synthesis and analysis laboratories and sees its scope extended in biological laboratories.

Coupled with NMR, Dynamic Nuclear Polarization (DNP) allows, thanks to polarizing agents, the enhancement of NMR signals from a wide range of molecules resulting in the significant reduction of the NMR acquisition time. It shows therefore strong advantages over "classical" NMR and possibly over X-ray diffraction techniques used to characterize proteins on synchrotron type equipments.

NMR has also known an impressive development in the medicine with the development of Magnetic Resonance Imaging (MRI).

Up to now, the DNP has been efficiently applied to MRI for the early diagnosis of cancers in small animals (rats and porks) in preclinical studies and more recently to 30 human patients having prostate cancers. However, MRI using DNP can not be generalized to human diagnosis as polarizing agents used to activate biological tracers/contrast agents need to be quantitatively separated from the polarized solution before human injection and image acquisition. This technical hurdle is now fixed.

In this context, an innovative powder for the easy polarization of many molecules, including biological tracers, was developed in the frame of a European collaboration involving the Laboratory of Chemistry, Catalysis, Polymers and Processes (UMR 5265-LC2P2), the European Center for high field NMR (UMR 5280, CRMN-Lyon) and ETH Zurich. These innovative "powders" open perspectives for the fast characterization of complex systems by means of solid state NMR using DNP but also in the field of medical imaging for early cancer diagnosis using MRI. In this latter field, the aforementioned materials can deliver a solution of polarized biological tracers /contrast agents free from any impurity and therefore injectable to humans.


Story Source:

The above post is reprinted from materials provided by Lyon Science Transfert - Université de Lyon. Note: Materials may be edited for content and length.


Journal Reference:

  1. David Gajan, Martin Schwarzwälder, Matthew P. Conley, Wolfram R. Grüning, Aaron J. Rossini, Alexandre Zagdoun, Moreno Lelli, Maxim Yulikov, Gunnar Jeschke, Claire Sauvée, Olivier Ouari, Paul Tordo, Laurent Veyre, Anne Lesage, Chloé Thieuleux, Lyndon Emsley, Christophe Copéret. Solid-Phase Polarization Matrixes for Dynamic Nuclear Polarization from Homogeneously Distributed Radicals in Mesostructured Hybrid Silica Materials. Journal of the American Chemical Society, 2013; 135 (41): 15459 DOI: 10.1021/ja405822h

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Lyon Science Transfert - Université de Lyon. "Powder to enhance NMR signals." ScienceDaily. ScienceDaily, 12 December 2013. <www.sciencedaily.com/releases/2013/12/131212132513.htm>.
Lyon Science Transfert - Université de Lyon. (2013, December 12). Powder to enhance NMR signals. ScienceDaily. Retrieved July 31, 2015 from www.sciencedaily.com/releases/2013/12/131212132513.htm
Lyon Science Transfert - Université de Lyon. "Powder to enhance NMR signals." ScienceDaily. www.sciencedaily.com/releases/2013/12/131212132513.htm (accessed July 31, 2015).

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