ArticleThe American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry2023
In Pre-Clinical AD Small Vessel Disease is Associated With Altered Hippocampal Connectivity and Atrophy.
Article in The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- Disrupted Calcium Dynamics in Reactive Astrocytes Occur with End Feet-Arteriole Decoupling in an Amyloid Mouse Model of Alzheimer's Disease.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025Article
- Multimodal neuroimaging ofFrontiers in neuroscience · 2025Article
- Distinct spatial contributions of amyloid pathology and cerebral small vessel disease to hippocampal morphology.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024Article
- Sex-dependent alterations in hippocampal connectivity are linked to cerebrovascular and amyloid pathologies in normal aging.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024Article
- Brain structure-function coupling associated with cognitive impairment in cerebral small vessel disease.Frontiers in neuroscience · 2023Review
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Authors and funding
12 authors at 1 institution in 1 country.
Funding
Abstract
objectiveSmall Vessel Disease (SVD) is known to be associated with higher AD risk, but its relationship to amyloidosis in the progression of AD is unclear. In this cross-sectional study of cognitively normal older adults, we explored the interactive effects of SVD and amyloid-beta (Aβ) pathology on hippocampal functional connectivity during an associative encoding task and on hippocampal volume.
methodsThis study included 61 cognitively normal older adults (age range: 65-93 years, age mean ± standard deviation: 75.8 ± 6.4, 41 [67.2%] female). PiB PET, T2-weighted FLAIR, T1-weighted and face-name fMRI images were acquired on each participant to evaluate brain Aβ, white matter hyperintensities (WMH+/- status), gray matter density, and hippocampal functional connectivity.
resultsWe found that, in WMH (+) older adults greater Aβ burden was associated with greater hippocampal local connectivity (i.e., hippocampal-parahippocampal connectivity) and lower gray matter density in medial temporal lobe (MTL), whereas in WMH (-) older adults greater Aβ burden was associated with greater hippocampal distal connectivity (i.e., hippocampal-prefrontal connectivity) and no changes in MTL gray matter density. Moreover, greater hippocampal local connectivity was associated with MTL atrophy.
conclusionThese observations support a hippocampal excitotoxicity model linking SVD to neurodegeneration in preclinical AD. This may explain how SVD may accelerate the progression from Aβ positivity to neurodegeneration, and subsequent AD.
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Registered trials
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