Title:High Resolution Nuclear Magnetic Resonance Spectroscopy on Biological Tissue and Metabolomics
Volume: 26
Issue: 12
Author(s): Yanqin Lin*, Qing Zeng, Liangjie Lin and Zhong Chen
Affiliation:
- Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Department of Electronic Science, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen,China
Keywords:
Nuclear magnetic resonance (NMR), high resolution, intermolecular multiple coherences (iMQC), single
quantum coherence, homo-decoupled (pure shift), structure elucidation, J-difference editing, metabolomics.
Abstract: High-resolution nuclear magnetic resonance (NMR) spectroscopy is a universal
analytical tool. It can provide detailed information on chemical shifts, J coupling constants,
multiplet patterns, and relative peak areas. It plays an important role in the fields of chemistry,
biology, medicine, and pharmacy. A highly homogeneous magnetic field is a prerequisite for
excellent spectral resolution. However, in some cases, such as in vivo and ex vivo biological
tissues, the magnetic field inhomogeneity due to magnetic susceptibility variation in samples
is unavoidable and hard to eliminate by conventional methods. The techniques based on intermolecular
multiple quantum coherences and conventional single quantum coherence can
remove the influence of the field inhomogeneity effects and be applied to obtain highresolution
NMR spectra of biological tissues, including in vivo animal and human tissues.
Broadband 1H homo-decoupled NMR spectroscopy displays J coupled resonances as collapsed
singlets, resulting in highly resolved spectra. It can be used to acquire high-resolution
spectra of some pharmaceuticals. The J-difference edited spectra can be used to detect J coupled
metabolites, such as γ-aminobutyric acid, the detection of which is interfered by intense
neighboring peaks. High-resolution 1H NMR spectroscopy has been widely utilized for the
identification and characterization of biological fluids, constituting an important tool in drug
discovery, drug development, and disease diagnosis.