Cited by 12Dementia and Cognitive Impairment ResearchAlzheimer's disease research and treatmentsCancer-related cognitive impairment studies

Neuroimaging genetic risk for Alzheimer’s disease in preclinical individuals: from candidate genes to polygenic approaches

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Harrison, Theresa M., Bookheimer, Susan Y.·2016·Biological Psychiatry Cognitive Neuroscience and Neuroimaging

Abstract

Better characterization of the preclinical phase of Alzheimer's disease (AD) is needed in order to develop effective interventions. Neuropathological changes in AD, including neuronal loss and the formation of proteinaceous deposits, begin up to 20 years before the onset of clinical symptoms. As such, the emergence of cognitive impairment should not be the sole basis used to diagnose AD nor to evaluate individuals for enrollment in clinical trials for preventative AD treatments. Instead, early preclinical biomarkers of disease and genetic risk should be used to determine most likely prognosis and enroll individuals in appropriate clinical trials. Neuroimaging-based biomarkers and genetic analysis together present a powerful system for classifying preclinical pathology in patients. Disease modifying interventions are more likely to produce positive outcomes when administered early in the course of AD. In this review, we examine the utility of the neuroimaging genetics field as it applies to AD and early detection during the preclinical phase. Neuroimaging studies focused on single genetic risk factors are summarized. However, we particularly focus on the recent increased interest in polygenic methods and discuss the benefits and disadvantages of these approaches. We discuss challenges in the neuroimaging genetics field, including limitations of statistical power arising from small effect sizes and the over-use of cross-sectional designs. Despite the limitations, neuroimaging genetics has already begun to influence clinical trial design and will play a major role in the prevention of AD.

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  • Increased genetic risk for LOAD as defined by a high PRS is associated with several imaging endophenotypes, including decreased cortical thickness in brain regions vulnerable to degeneration in AD, decreased total brain volume, and decreased hippocampal volume.

    “increased genetic risk for LOAD as defined by a high PRS is associated with several imaging endophenotypes, including decreased cortical thickness in brain regions known to be vulnerable to degeneration in AD, decreased total brain volume, and decreased hippocampal volume [234]”

    From Genetic architecture of Alzheimer's disease (2020) · cites this paper as [234]

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  1. [81]Bralten J Franke B Arias-Vásquez A Heister A Brunner HG Fernández G Rijpkema M CR1 genotype is associated with entorhinal cortex volume in young healthy adults. Neurobiol Aging 2011 32 2106.e7 11 21726919

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Authors
Harrison, T. M., & Bookheimer, S. Y.
Affiliations
University of California, Los Angeles (US)
Corresponding author
Harrison, Theresa M.
Venue
Biological Psychiatry Cognitive Neuroscience and Neuroimaging
Publisher
Elsevier BV
Published
2016-01
Volume
1
Issue
1
Pages
14-23
ISSN
2451-9022 (ISSN-L)
OpenAlex
W2218312646
Cited by
12
References
83
Citations by year
2022: 1 · 2020: 4 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 2
FWCI
1.63
Type
journal article
Language
en
Open access
Locations
  • Biological Psychiatry Cognitive Neuroscience and Neuroimaging (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
National Institute on Aging (5R01AG013308, 1F31AG047041)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Cancer-related cognitive impairment studies
Keywords
Alzheimer's disease, preclinical Alzheimer's disease, neuroimaging genetics, genetic risk factors, polygenic risk score, candidate genes, neuroimaging biomarkers, early detection, clinical trial recruitment, disease-modifying interventions, statistical power, cross-section design

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