Brain iron deposits are associated with general cognitive ability and cognitive aging

Lars Penke, Maria C Valdés Hernandéz, Susana Muñoz Maniega, Alan J. Gow, Catherine Murray, John M. Starr, Mark E. Bastin, Ian J. Deary, Joanna M. Wardlaw

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    63 Citations (Scopus)

    Abstract

    A novel analysis of magnetic resonance imaging (MRI) scans based on multispectral image fusion was used to quantify iron deposits in basal ganglia and microbleeds in 143 nondemented subjects of the generally healthy Lothian Birth Cohort, who were tested for general cognitive ability (intelligence) at mean ages of 11, 70, and 72 years. Possessing more iron deposits at age 72 was significantly associated with lower general cognitive ability at age 11, 70, and 72, explaining 4% to 9% of the variance. The relationships with old age general cognitive ability remained significant after controlling for childhood cognition, suggesting that iron deposits are related to lifetime cognitive decline. Most iron deposits were in the basal ganglia, with few microbleeds. While iron deposits in the general population have so far been dismissed in the literature, our results show substantial associations with cognitive functioning. The pattern of results suggests that iron deposits are not only a biomarker of general cognitive ability in old age and age-related cognitive decline, but that they are also related to the lifelong-stable trait of intelligence. (C) 2012 Elsevier Inc. All rights reserved.

    Original languageEnglish
    Pages (from-to)510-517.e2
    Number of pages10
    JournalNeurobiology of Aging
    Volume33
    Issue number3
    DOIs
    Publication statusPublished - Mar 2012

    Keywords

    • General cognitive ability
    • INTELLIGENCE
    • AGE
    • DEEP GRAY-MATTER
    • NEUROSCIENCE
    • Cognition
    • BASAL GANGLIA
    • MINERALIZATION
    • Intelligence
    • Cognitive aging
    • MRI
    • Iron
    • Hemosiderin
    • Basal ganglia

    Cite this

    Penke, L., Hernandéz, M. C. V., Maniega, S. M., Gow, A. J., Murray, C., Starr, J. M., Bastin, M. E., Deary, I. J., & Wardlaw, J. M. (2012). Brain iron deposits are associated with general cognitive ability and cognitive aging. Neurobiology of Aging, 33(3), 510-517.e2. https://doi.org/10.1016/j.neurobiolaging.2010.04.032