ArticleAlzheimer's & dementia : the journal of the Alzheimer's Association2025
High-caloric intake rescues early symptomatic AD-induced hippocampal neurovascular coupling deficits.
Article in Alzheimer's & dementia : the journal of the Alzheimer's Association, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Stable neuronal representations underlie cognitive resilience to Alzheimer's disease pathology.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026Article
- Stable neuronal representations to repeated stimulation underlie cognitive resilience in Alzheimer's disease pathology.bioRxiv : the preprint server for biology · 2025Article
- High-caloric intake rescues early symptomatic AD-induced hippocampal neurovascular coupling deficits.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025Article
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Authors and funding
9 authors.
Funding
Abstract
introductionAlzheimer's disease (AD) involves progressive hippocampal dysfunction and atrophy. Obesity, common in AD patients, is a known dementia risk factor. Studying their interaction is difficult in humans due to AD's slow progression. Experimental AD models comorbid with obesity are needed for translational insights. This study examined the effects of a high-carbohydrate, high-fat (HCHF) diet in 12-month-old TgF344-AD rats.
methodsNontransgenic (nTg) and TgAD rats received CHOW or CHOW and HCHF diet items from 9 to 12 months of age. Hippocampal neurovascular function was assessed using pseudo continuous arterial spin labeling (pCASL)-MRI during forepaw stimulation. Neuronal activity was recorded with Neuropixels probes.
resultsCHOW-fed TgAD rats showed reduced hippocampal cerebral blood flow (CBF), CBF changes spread, and neuronal power responses to somatosensory stimulation; all of these deficits were improved on the HCHF diet. DISCUSSION: This approach provides a sensitive, task-free assay of hippocampal neurovascular coupling. The transiently improved neurovascular and electrophysiological metrics in HCHF-fed TgAD rats may be a manifestation of metabolically dysregulated AD brain benefitting from increased metabolite availability. HIGHLIGHTS: Pseudo-continuous arterial spin labeling (pCASL) magnetic resonance imaging (MRI) -based characterization of hippocampal functional hyperemia. Hippocampal functional hyperemia is attenuated in symptomatic Alzheimer's disease (AD) pathology. A high-carbohydrate, high-fat (HCHF) diet transiently restores hippocampal functional hyperemia in symptomatic AD pathology.
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