Is myo-inositol a measure of glial swelling after stroke? a magnetic resonance study
Article first published online: 23 DEC 2002
Copyright © 2002 Wiley-Liss, Inc.
Journal of Magnetic Resonance Imaging
Volume 17, Issue 1, pages 11–19, January 2003
How to Cite
Rumpel, H., Lim, W. E. H., Chang, H. M., Chan, L. L., Ho, G. L., Wong, M. C. and Tan, K. P. (2003), Is myo-inositol a measure of glial swelling after stroke? a magnetic resonance study. J. Magn. Reson. Imaging, 17: 11–19. doi: 10.1002/jmri.10233
- Issue published online: 23 DEC 2002
- Article first published online: 23 DEC 2002
- Manuscript Accepted: 18 SEP 2002
- Manuscript Received: 13 MAY 2002
- Singapore Health Services. Grant Number: BF001/2001
- apparent diffusion coefficient;
- quantitative 1H MR spectroscopy;
- glial cell
To determine whether the hypothesis that the phenomenon of persistent cytotoxic edema in the subacute stage of ischemic stroke is in fact associated with the glial population. This is done by assessing the evolution of both the apparent diffusion coefficient (ADC) and the glial-specific marker myo-inositol (Ins) in a group of patients, and by comparing the results with the total cellular density by means of the creatine (Cre) level.
Material and Methods
Twenty-two patients with stroke in the territory of the middle cerebral artery were each examined once only at a time ranging from eight hours to six days following the onset of symptoms. Lesion-to-contralateral values of ADC were obtained based on diffusion-weighted echo-planar imaging. Short TE single-voxel proton magnetic resonance (1H MR) spectroscopy was used for quantification of cerebral metabolites in infarcted regions. Their levels were also compared with those in homotopic contralateral regions.
In the stroke lesion, there was a significant correlation between ADC and the Ins level, albeit less pronounced than that for Cre. During different pathophysiological stages between 12 hours and three days, the Ins-to-Cre ratio increased by a factor of two and returned to apparently normal thereafter.
Our study provides the first demonstration of a relationship between persistent cytotoxic edema and the glial population in the context of cell swelling due to osmotic imbalance in stroke patients. J. Magn. Reson. Imaging 2003;17:11–19. © 2002 Wiley-Liss, Inc.