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Cardiovascular risks impact human brain -acetylaspartate in regionally specific patterns. | LitMetric

AI Article Synopsis

  • Cardiovascular risk factors like dyslipidemia and hypertension contribute to white matter pathology and cognitive decline, leading to concerns about brain health.
  • The study hypothesizes that levels of -acetylaspartate (NAA), a key chemical in myelin lipid synthesis, can be used as a biomarker to observe the effects of these risk factors on brain health before clinical symptoms appear.
  • Results showed a strong negative correlation between NAA levels and Framingham Cardiovascular Risk Score (FCVRS) mostly in white matter, indicating that cardiovascular risks affect brain neurochemistry and suggesting NAA mapping could be a useful tool for early detection of these effects.

Article 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 -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.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6911181PMC
http://dx.doi.org/10.1073/pnas.1907730116DOI Listing

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