Neurofibrillary Tangles and Conversion to Mild Cognitive Impairment with Certain Antihypertensives

Whitney Wharton, Liping Zhao, Kyle Steenland, Felicia C. Goldstein, Julie A. Schneider, Lisa L. Barnes, Marla Gearing, Sevil Yasar

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Individuals taking renin angiotensin system (RAS) acting antihypertensives exhibit slower cognitive decline and are less likely to progress from mild cognitive impairment (MCI) to Alzheimer's disease (AD), but the mechanism remains unclear. Objective: We tested the hypothesis that individuals taking RAS acting antihypertensives exhibit less AD-related neuropathology and slower disease progression than individuals taking non-RAS acting antihypertensives. Method: Participants included 83 individuals with MCI who were taking an antihypertensive at baseline, had at least two follow-up visits, and had postmortem neuropathological data. Participants were old (M=83.1 years), 32% male, well educated (M=15.7 years), and 9.2% Black. Results: RAS medication users (N=38) were less likely to progress to AD than non-RAS users (N=45). RAS users exhibited fewer neurofibrillary tangles than non-RAS users in the hippocampal CA1 region (p<0.01), entorhinal cortex (p=0.03), and the angular gyrus, inferior temporal, mid-frontal cortex, and superior frontal (p=0.01). Conclusion: Prevention or clearance of neurofibrillary tangles represents a mechanism by which RAS medications may slow disease progression.

Original languageEnglish (US)
Pages (from-to)153-161
Number of pages9
JournalJournal of Alzheimer's Disease
Volume70
Issue number1
DOIs
StatePublished - 2019

Keywords

  • Alzheimer's disease
  • blood pressure
  • hypertension
  • mild cognitive impairment
  • neuropathology
  • prevention
  • renin angiotensin system
  • tau

ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Psychology
  • Geriatrics and Gerontology
  • Psychiatry and Mental health

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