Cerebrovascular pathology in Down syndrome and Alzheimer disease

Elizabeth Head, Michael J. Phelan, Eric Doran, Ronald C. Kim, Wayne W. Poon, Frederick A. Schmitt, Ira T. Lott

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


People with Down syndrome (DS) are at high risk for developing Alzheimer disease (AD) with age. Typically, by age 40 years, most people with DS have sufficient neuropathology for an AD diagnosis. Interestingly, atherosclerosis and hypertension are atypical in DS with age, suggesting the lack of these vascular risk factors may be associated with reduced cerebrovascular pathology. However, because the extra copy of APP leads to increased beta-amyloid peptide (Aβ) accumulation in DS, we hypothesized that there would be more extensive and widespread cerebral amyloid angiopathy (CAA) with age in DS relative to sporadic AD. To test this hypothesis CAA, atherosclerosis and arteriolosclerosis were used as measures of cerebrovascular pathology and compared in post mortem tissue from individuals with DS (n = 32), sporadic AD (n = 80) and controls (n = 37). CAA was observed with significantly higher frequencies in brains of individuals with DS compared to sporadic AD and controls. Atherosclerosis and arteriolosclerosis were rare in the cases with DS. CAA in DS may be a target for future interventional clinical trials.

Original languageEnglish
Pages (from-to)93
Number of pages1
JournalActa neuropathologica communications
Issue number1
StatePublished - Dec 1 2017


  • Arteriolosclerosis
  • Atherosclerosis
  • Cerebral amyloid angiopathy
  • Trisomy 21
  • Vascular risk factors

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Clinical Neurology
  • Cellular and Molecular Neuroscience


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