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    Metabolism Changes During Aging in the Hippocampus and Striatum of Glud1 (Glutamate Dehydrogenase 1) Transgenic Mice

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    Hui_2014.pdf (711.0Kb)
    Issue Date
    2014
    Author
    Choi, In-Young
    Lee, Phil
    Wang, Wen-Tung
    Hui, Dongwei
    Wang, Xinkun
    Brooks, William M.
    Michaelis, Elias K.
    Publisher
    Springer Verlag
    Type
    Article
    Article Version
    Scholarly/refereed, author accepted manuscript
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    Abstract
    The decline in neuronal function during aging may result from increases in extracellular glutamate (Glu), Glu-induced neurotoxicity, and altered mitochondrial metabolism. To study metabolic responses to persistently high levels of Glu at synapses during aging, we used transgenic (Tg) mice that over-express the enzyme Glu dehydrogenase (GDH) in brain neurons and release excess Glu in synapses. Mitochondrial GDH is important in amino acid and carbohydrate metabolism and in anaplerotic reactions. We monitored changes in nineteen neurochemicals in the hippocampus and striatum of adult, middle aged, and aged Tg and wild type (wt) mice, in vivo, using proton (1H) magnetic resonance spectroscopy. Significant differences between adult Tg and wt were higher Glu, N-acetyl aspartate (NAA), and NAA + NAA−Glu (NAAG) levels, and lower lactate in the Tg hippocampus and striatum than those of wt. During aging, consistent changes in Tg and wt hippocampus and striatum included increases in myo-inositol and NAAG. The levels of glutamine (Gln), a key neurochemical in the Gln-Glu cycle between neurons and astroglia, increased during aging in both the striatum and hippocampus of Tg mice, but only in the striatum of the wt mice. Age-related increases of Glu were observed only in the striatum of the Tg mice.
    Description
    The final publication is available at Springer via http://dx.doi.org/10.1007/s11064-014-1239-9.
    URI
    http://hdl.handle.net/1808/24650
    DOI
    https://doi.org/10.1007/s11064-014-1239-9
    Collections
    • Higuchi Biosciences Center Scholarly Works [56]
    Citation
    Choi, I.-Y., Lee, P., Wang, W.-T., Hui, D., Wang, X., Brooks, W. M., & Michaelis, E. K. (2014). Metabolism Changes During Aging in the Hippocampus and Striatum of Glud1 (Glutamate Dehydrogenase 1) Transgenic Mice. Neurochemical Research, 39(3), 446–455. http://doi.org/10.1007/s11064-014-1239-9

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    KU Libraries
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    785-864-8983

    KU Libraries
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    Lawrence, KS 66045
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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