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Cholesterol in mild cognitive impairment and Alzheimer’s disease in a birth cohort over 14 years

  • P. ToroEmail author
  • Ch. Degen
  • M. Pierer
  • D. Gustafson
  • J. Schröder
  • P. Schönknecht
Original Paper

Abstract

Animal epidemiological and clinical studies suggest that cholesterol is a risk factor for Alzheimer’s disease (AD). Nevertheless, the relation of cholesterol to mild cognitive impairment (MCI), influence of APOE genotype and its changes in lifespan is controversial. We investigated the potential impact of plasma total cholesterol (TC) on development of MCI and AD in the interdisciplinary longitudinal study on adult development and aging, a representative birth cohort (born 1930–1932), examined in 1993/1994 (VT1), 1997/1998 (VT2), and 2005/2007 (VT3). Of 500 participants at baseline, 381 survived and were examined at VT3. After exclusion of participants with lifetime prevalence of major psychiatric diseases or mild cognitive disorder due to a medical condition, 222 participants were included in the analysis. At VT3, 82 participants had MCI, 22 participants had AD, and 118 were in good health. Participants with MCI and AD at VT3 evidenced higher TC levels at VT1 than those who were healthy. Higher TC levels at baseline were associated with an increased risk for cognitive disorders at VT3 (highest vs. lowest quartile: OR 2.64, 95 % CI 1.12–6.23, p < 0.05). Over the 14 year follow-up, TC levels declined in those with MCI and AD, but remained stable in those who remained healthy. These findings were not modified by APOE genotype or use of cholesterol-lowering medications. Our findings demonstrate that higher TC levels are observed long before the clinical manifestation of MCI and AD in patients without psychiatric or somatic comorbidities and are independent of APOE genotype.

Keywords

AACD AD APOE Cholesterol ILSE MCI 

Notes

Acknowledgments

The interdisciplinary longitudinal study on adult development and aging (ILSE) was supported by the “Research Program of the State of Baden-Württemberg” and the “Federal Ministry for Family, Senior Citizen, Women, and Youth, Germany.” P. Toro and J. Schröder received additional support by the “Marsilius Kolleg,” center of advanced studies, University of Heidelberg, Germany. This work was supported by the European Commission under the 7th Framework Programme of the European Union “Therapeutic and preventive impact of nutritional lipids on neuronal and cognitive performance in aging, Alzheimer’s disease and vascular dementia” coordinated by Prof Dr. Tobias Hartmann.

Conflict of interest

P. Toro, CH. Degen, D. Gustafson, M.Pierer, P. Schönknecht and J. Schröder declare no conflict of interest.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • P. Toro
    • 1
    • 2
    Email author
  • Ch. Degen
    • 1
  • M. Pierer
    • 3
  • D. Gustafson
    • 4
    • 5
  • J. Schröder
    • 1
  • P. Schönknecht
    • 1
    • 6
  1. 1.Section of Geriatric PsychiatryUniversity of HeidelbergHeidelbergGermany
  2. 2.Department of Psychiatry, Faculty of MedicineCatholic University of ChileSantiagoChile
  3. 3.Department of Internal MedicineUniversity of LeipzigLeipzigGermany
  4. 4.Section for Psychiatry and Neurochemistry, Neuropsychiatric Epidemiology Unit, Sahlgrenska AcademyGothenburg UniversityGöteborgSweden
  5. 5.Departments of Neurology and MedicineSUNY-Downstate Medical CenterBrooklynUSA
  6. 6.Department of PsychiatryUniversity of LeipzigLeipzigGermany

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