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Current Alzheimer Research

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ISSN (Print): 1567-2050
ISSN (Online): 1875-5828

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Review Article

The Relationship of Anxiety with Alzheimer’s Disease: A Narrative Review

Author(s): Palak Patel and Arjun V. Masurkar*

Volume 18, Issue 5, 2021

Published on: 23 August, 2021

Page: [359 - 371] Pages: 13

DOI: 10.2174/1567205018666210823095603

Price: $65

Abstract

Background: There is an increased effort to better understand neuropsychiatric symptoms of Alzheimer’s Disease (AD) as an important feature of symptomatic burden as well as potential modifiable factors of the disease process. Anxiety is one of the most common neuropsychiatric symptoms in Alzheimer’s Disease (AD). A growing body of work has emerged that addresses the epidemiology and biological correlations of anxiety in AD.

Methods: Here, we review human studies in research and clinical cohorts that examined anxiety in AD. We focused on work related to prevalence across AD stages, correlation with established biomarkers, relationship with AD neuropathology and genetic risk factors, and impact on progression.

Results: Anxiety is prominent in the early stages and increases across the spectrum of functional stages. Biomarker relationships are strongest at the level of FDG-PET and amyloid measured via PET or cerebrospinal fluid analysis. Neuropathologically, anxiety emerges with early Braak stage tau pathology. The presence of the apolipoprotein E e4 allele is associated with increased anxiety at all stages, most notably at mild cognitive impairment. Anxiety portended a faster progression at all predementia stages.

Conclusion: This body of work suggests a close biological relationship between anxiety and AD that begins in early stages and influences functional decline. As such, we discuss future work that would improve our understanding of this relationship and test the validity of anxiolytic treatment as disease modifying therapy for AD.

Keywords: Anxiety, Alzheimer's disease, neuropsychiatric, early stage, preclinical, prodromal.

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