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A systematic review of brain metabolite changes, measured with H-1 magnetic resonance spectroscopy, in healthy aging

Author(s): K. K. Haga, Y. P. Khor, A. Farrall, J. M. Wardlaw

Abstract:
Background: H-1 MR spectroscopy (MRS) can identify metabolite abnormalities in age-related, neurological diseases. However, there is little information on how metabolites change with healthy aging. Methods: We systematically reviewed the literature on MRS, front 1980 to 2006, for studies where healthy young subjects (<60 years) were compared to healthy older subjects (>60 years). We extracted metabolite data reported as "no change", "increase" or "decrease" for each metabolite by brain region and, where data were available, meta-analysed mean metabolite concentrations (mM) for young versus old subjects. Results: Eighteen studies met the inclusion criteria (total n = 703 subjects, 284 >60 years old). Most data came front the frontal region, and reported "no change" in older subjects; however, a meta-analysis revealed a decrease in frontal NAA (p = 0.05) and increases in parietal choline (p = 0.003) and creatine (p < 0.001). Discussion: These data suggest that NAA may decrease and choline and creatine increase with age. Therefore, more data are needed from older subjects to characterise age effects better and ratios in older subjects should be interpreted with caution. (C) 2007 Elsevier Inc. All rights reserved.

Full version: Available here

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ISBN: 0197-4580
Publication Year: 2009
Periodical: Neurobiology of Aging
Periodical Number: 3
Volume: 30
Pages: 353-363
Author Address: