Contribution of changes in ubiquitin and myelin basic protein to age-related cognitive decline

Deng Shun Wang, David A. Bennett, Elliott J. Mufson, Petri Mattila, Elizabeth Cochran, Dennis W. Dickson

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

The structural substrates for age-associated cognitive and motor slowing are not known, but age-related white matter changes, such as ubiquitin (UBQ)-immunoreactive granular degeneration of myelin, might contribute to this slowing. To address this hypothesis we measured immunoreactivity for UBQ and myelin basic protein (MBP) in frontal white matter of age-, sex- and postmortem interval-matched cases with no cognitive impairment (NCI; N=12), mild cognitive impairment (MCI; N=14) and Alzheimer disease (AD; N=12). There were no significant correlations between UBQ in white matter and cognitive measures, but MBP was significantly lower in AD compared with NCI and MCI. MBP correlated with overall cognition as assessed by neuropsychological summary scores, as well as with timed cognitive tests and those that reflect frontal functions. An age-related decrease in MBP immunoreactivity was detected in NCI cases (r=0.71). These results support the hypothesis that white matter pathology may contribute to age-associated decline in cognition.

Original languageEnglish (US)
Pages (from-to)93-100
Number of pages8
JournalNeuroscience Research
Volume48
Issue number1
DOIs
StatePublished - Jan 2004

Keywords

  • Aging
  • Alzheimer's disease
  • Mild cognitive impairment
  • Myelin basic protein
  • Ubiquitin

ASJC Scopus subject areas

  • Neuroscience(all)

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