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    Cardiovascular risks impact human brain Nacetylaspartate in regionally specific patterns

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    Author
    Chiappelli, J.
    Rowland, L.M.
    Wijtenburg, S.A.
    Chen, H.
    Maudsley, A.A.
    Sheriff, S.
    Chen, S.
    Savransky, A.
    Marshall, W.
    Ryan, M.C.
    Bruce, H.A.
    Shuldiner, A.R.
    Mitchell, B.D.
    Kochunov, P.
    Hong, L.E.
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    Date
    2019
    Journal
    Proceedings of the National Academy of Sciences of the United States of America
    Publisher
    National Academy of Sciences
    Type
    Article
    
    Metadata
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    See at
    https://doi.org/10.1073/pnas.1907730116
    Abstract
    Cardiovascular risk factors such as dyslipidemia and hypertension increase the risk for white matter pathology and cognitive decline. We hypothesize that white matter levels of N-acetylaspartate (NAA), a chemical involved in the metabolic pathway for myelin lipid synthesis, could serve as a biomarker that tracks the influence of cardiovascular risk factors on white matter prior to emergence of clinical changes. To test this, we measured levels of NAA across white matter and gray matter in the brain using echo planar spectroscopic imaging (EPSI) in 163 individuals and examined the relationship of regional NAA levels and cardiovascular risk factors as indexed by the Framingham Cardiovascular Risk Score (FCVRS). NAA was strongly and negatively correlated with FCVRS across the brain, but, after accounting for age and sex, the association was found primarily in white matter regions, with additional effects found in the thalamus, hippocampus, and cingulate gyrus. FCVRS was also negatively correlated with creatine levels, again primarily in white matter. The results suggest that cardiovascular risks are related to neurochemistry with a predominantly white matter pattern and some subcortical and cortical gray matter involvement. NAA mapping of the brain may provide early surveillance for the potential subclinical impact of cardiovascular and metabolic risk factors on the brain.
    Sponsors
    This work was supported by NIH Grants K23MH112010, U01MH108148, R01MH116948, R01MH112180, R01MH094520, and P50 MH103222. The EPSI and MIDAS software are supported by NIH Grant R01EB016064.
    Keyword
    Creatine
    Hypertension
    Neurochemistry
    White matter
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076351700&doi=10.1073%2fpnas.1907730116&partnerID=40&md5=e84c2de41a08d6feb00b0bf2a2530105; http://hdl.handle.net/10713/12817
    ae974a485f413a2113503eed53cd6c53
    10.1073/pnas.1907730116
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