The role of extracerebral cholesterol homeostasis and ApoE e4 in cognitive decline

T.N. van den Kommer, M.G. Dik, H.C. Comijs, D. Lutjohann, P.T.A.M. Lips, C. Jonker, D.J.H. Deeg

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    We examined the associations between extracerebral markers of cholesterol homeostasis and cognitive decline over 6 years of follow-up, and studied the modifying effect of apolipoprotein E (ApoE) e4. Data were collected in the Longitudinal Aging Study Amsterdam (n = 967, with longitudinal data on cognition, ages ≥ 65 years) and analyzed using linear mixed models. General cognition (Mini-Mental State Examination; MMSE), memory (Auditory Verbal Learning Test), and information processing speed (Coding task) were measured. The results show that ApoE e4 was a significant effect modifier. Significant associations were found only in ApoE e4 noncarriers (n = 718). We found a nonlinear negative association between the ratio of lanosterol to cholesterol (≤ 189.96 ng/mg), a marker for cholesterol synthesis, and general cognition. Lower cholesterol absorption, i.e., lower ratios of campesterol and sitosterol to cholesterol, as well as a higher rate of cholesterol synthesis relative to absorption were associated with lower information processing speed. In ApoE e4 carriers, the negative association between the ratio of campesterol to cholesterol and memory reached borderline significance. Future research should focus on the interaction between (disturbed) cholesterol homeostasis and ApoE e4 status with respect to dementia. © 2012 Elsevier Inc.
    Original languageEnglish
    Pages (from-to)622.e17-622.e28
    JournalNeurobiology of Aging
    Volume33
    Issue number3
    DOIs
    Publication statusPublished - 2012

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