Extracranial carotid atherosclerosis is associated with increased neurofibrillary tangle accumulation

Juan C. Arias, Mark Edwards, Francesca Vitali, Thomas G. Beach, Geidy E. Serrano, Craig C. Weinkauf

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Objective: We sought to determine whether extracranial carotid atherosclerotic disease (ECAD) is associated with increased key neurodegenerative pathology such as neurofibrillary tangle (NFT), beta-amyloid plaque, or cerebral amyloid angiopathy (CAA) accumulation, findings associated with Alzheimer's disease (AD) and other dementias. Methods: Our prospective, longitudinal, clinicopathologic study, the AZSAND (Arizona study of aging and neurodegenerative disorders) and Brain and Body Donation Program, recorded the presence or absence of clinically diagnosed ECAD and performed semiquantitative density estimates of NFT, beta-amyloid plaque, and CAA at death. After adjusting for potential confounding factors determined by logistic regression analysis, histopathology density scores were evaluated in individuals with ECAD (n = 66) and those without ECAD (n = 125). Results: We found that the presence of ECAD was associated with a 21% greater NFT burden at death compared with no ECAD (P =.02). Anatomically, an increased NFT burden was seen throughout the brain regions evaluated but was significant in the temporal lobe (P <.05) and entorhinal cortex (P =.02). In addition, we found that subjects who had undergone carotid endarterectomy (CEA), the surgical treatment of ECAD (n = 32), had decreased NFT densities compared with those with ECAD who had not undergone CEA (n = 66; P =.04). In contrast to NFT, ECAD was not associated with beta-amyloid plaques or CAA density. Conclusions: These findings indicate that ECAD is associated with the NFT burden in the temporal lobe and entorhinal cortex, which has clinical significance for AD and non-AD dementias and cognitive dysfunction. Further understanding of whether ECAD increases the risk of neurodegenerative brain changes is highly relevant because ECAD is a treatable disease that has not, otherwise, been evaluated for nor specifically treated as a dementia risk factor.

Original languageEnglish (US)
Pages (from-to)223-228
Number of pages6
JournalJournal of vascular surgery
Volume75
Issue number1
DOIs
StatePublished - Jan 2022
Externally publishedYes

Keywords

  • Alzheimer's disease
  • Beta-amyloid plaque
  • Carotid endarterectomy
  • Dementia
  • Extracranial carotid atherosclerotic disease
  • Neurofibrillary tangles

ASJC Scopus subject areas

  • Surgery
  • Cardiology and Cardiovascular Medicine

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