The proximal histidyl N H signal of myoglobin is detectable in 1 H NMR spectra of myocardial and skeletal muscle, and its intensity reflects the intracellular oxygenation. At 1.5 Tesla (T), the typical field strength of clinical magnetic resonance imaging (MRI) magnets, the paramagnetic relaxation c
1h nmr observation of tissue myoglobin: an indicator of cellular oxygenation in vivo
β Scribed by T. Jue; S. Anderson
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 291 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0740-3194
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
Cellular oxygen status is a critical parameter. To measure the oxygen tension in vivo, however, demands extant techniques to surmount two experimental difficulties: invasive experimental protocols and imprecise tissue localization. NMR techniques have the potential to overcome these obstacles. Indeed we show in this study that cellular myoglobin is NMR visible and its proximal histidyl NH signal in the deoxy state can be used to monitor changes in cellular oxygenation. Coupled with recent advances in NMR signal localization, this ^1^H NMR strategy promises to lead directly to cellular oxygen measurement in specific tissue regions in vivo.
π SIMILAR VOLUMES
The elevated levels of brain histidine in histidinaemic mice are detected in vivo by 1H NMR at 8.5 and 1.9 T. The concentrations determined from the in vivo spectra correlate well with subsequent analytical determinations. This technique is discussed in relation to monitoring phenylalanine in humans
## Abstract ^1^H NMR spectroscopy was used to detect the proximal histidyl N~Ξ΄~, proton signal of deoxymyoglobin from canine hearts __in vivo__ during graded myocardial ischemia. The NMR signal intensity provided an indicator of intracellular oxygenation in myocardium. The relationship between the
## Abstract Measurement of oxygen concentration and distribution in the brain is essential for understanding the pathophysiology of stroke. Lowβfrequency electron paramagnetic resonance (EPR) spectroscopy with a paramagnetic probe is an attractive imaging modality that potentially can be used to ma