Proton MR spectroscopy detects a relative decrease of N-acetylaspartate in the medial temporal lobe of patients with AD

Jessen, F. and Block, W. and Träber, F. and Keller, E. and Flacke, S. and Papassotiropoulos, A. and Lamerichs, R. and Heun, R. and Schild, H. H.. (2000) Proton MR spectroscopy detects a relative decrease of N-acetylaspartate in the medial temporal lobe of patients with AD. Neurology, Vol. 55, H. 5. pp. 684-688.

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Official URL: http://edoc.unibas.ch/dok/A5257211

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BACKGROUND: The reduction of N-acetylaspartate (NAA) detected by proton MR spectroscopy (1H-MRS) represents a robust but unspecific marker for neuronal loss or dysfunction. OBJECTIVE: To apply 1H-MRS in two brain regions that reflect the characteristic spatial distribution of neuronal loss in AD. These regions are the medial temporal lobe (MTL), which is affected early in AD, and the primary motor and sensory cortex (central region), which is affected late in the disease and might serve as an intraindividual control region in mild to moderate disease stages. METHODS: Twenty patients and 18 volunteers underwent 1H-MRS in both brain areas. The metabolic ratios of NAA/creatine and choline/creatine were determined. Additionally, the metabolic ratios of the MTL were divided by the ratios of the central region to assess the relative change in the MTL in individual subjects. All ratios were correlated with psychometric test scores. RESULTS: A significant reduction of NAA/creatine and choline/creatine ratios was detected in the MTL of patients with AD. In the central region, no significant difference between the groups was found. NAA/creatine (MTL/central region) was reduced in patients with AD and showed a correlation with the Mini-Mental State Examination and the cognitive part of the Alzheimer Disease Assessment Scale scores. Choline/creatine (MTL/central region) did not show a significant difference between groups. CONCLUSION: Assessing the distribution of NAA/creatine reduction guided by the expected neuropathologic change can improve the role of 1H-MRS in the assessment of AD. The disease severity can be monitored by relative reduction of NAA/creatine in the MTL in comparison with an intraindividual unaffected control region.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Services Biozentrum > Life Sciences Training Facility (Papassotiropoulos)
07 Faculty of Psychology > Departement Psychologie > Ehemalige Einheiten Psychologie > Molecular Neuroscience (Papassotiropoulos)
UniBasel Contributors:Papassotiropoulos, Andreas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Lancet Publications
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:19
Deposited On:22 Mar 2012 13:17

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