Physical inactivity is a recognized modifiable risk factor for Alzheimer’s disease (AD), yet its relationship with progression of AD pathology in humans remains unclear, limiting the effective translation into prevention trials. Using pedometer-measured step counts in cognitively unimpaired older adults, we demonstrated an association between higher physical activity and slower cognitive and functional decline in… Continue reading Physical #activity as a modifiable risk factor in preclinical #Alzheimer’s disease
Tag: Alzheimer
#Retinal vascular dysfunction in the Mthfr677C>T mouse model of #cerebrovascular disease
INTRODUCTIONInvestigations of retinal biomarkers for #Alzheimer's disease (AD) and AD and related dementias (ADRD), has increased significantly. We examine retinal vascular health in a mouse containing the ADRD risk variant Mthfr677C>T to determine if changes in retina mirror similar changes in cerebrovasculature.METHODSMorphology and function of retinal vasculature and neurons were assessed using in vivo imaging,… Continue reading #Retinal vascular dysfunction in the Mthfr677C>T mouse model of #cerebrovascular disease
Association of #Egg Intake With #Alzheimer’s #Dementia Risk in #Older Adults: The Rush #Memory and Aging Project
BackgroundAlzheimer’s disease (AD) is a neurodegenerative disorder with increasing prevalence due to population aging. Eggs provide many nutrients important for brain health, including choline, omega-3 fatty acids, and lutein. Emerging evidence suggests that frequent egg consumption may improve cognitive performance on verbal tests, but whether consumption influences the risk of Alzheimer’s dementia and AD is… Continue reading Association of #Egg Intake With #Alzheimer’s #Dementia Risk in #Older Adults: The Rush #Memory and Aging Project
#AI -guided patient stratification improves outcomes and efficiency in the AMARANTH #Alzheimer’s Disease clinical trial
Alzheimer’s Disease (AD) drug discovery has been hampered by patient heterogeneity, and the lack of sensitive tools for precise stratification. Here, we demonstrate that our robust and interpretable AI-guided tool (predictive prognostic model, PPM) enhances precision in patient stratification, improving outcomes and decreasing sample size for a AD clinical trial. The AMARANTH trial of lanabecestat,… Continue reading #AI -guided patient stratification improves outcomes and efficiency in the AMARANTH #Alzheimer’s Disease clinical trial
GLP-1RA and SGLT2i Medications for Type 2 #Diabetes and #Alzheimer Disease and Related Dementias
Importance The association between glucagon-like peptide-1 receptor agonists (GLP-1RAs) and sodium-glucose cotransporter-2 inhibitors (SGLT2is) and risk of Alzheimer disease and related dementias (ADRD) remains to be confirmed.Objective To assess the risk of ADRD associated with GLP-1RAs and SGLT2is in people with type 2 diabetes (T2D).Design, Setting, and Participants This target trial emulation study used electronic… Continue reading GLP-1RA and SGLT2i Medications for Type 2 #Diabetes and #Alzheimer Disease and Related Dementias
Marital status and risk of #dementia over 18 years: Surprising findings from the National Alzheimer’s Coordinating Center
Marital status is a potential risk/protective factor for adverse health outcomes. This study tested whether marital status was associated with dementia risk in older adults.METHODSParticipants (N = 24,107; Meanage = 71.79) were from the National Alzheimer's Coordinating Center. Cox regressions tested the association between baseline marital status and clinically ascertained dementia over up to 18… Continue reading Marital status and risk of #dementia over 18 years: Surprising findings from the National Alzheimer’s Coordinating Center
Association of rapid eye movement #sleep latency with multimodal biomarkers of #Alzheimer’s disease
Sleep disturbances are associated with Alzheimer's disease (AD) and Alzheimer's disease and related dementias (ADRD), but the relationship between sleep architecture, particularly rapid eye movement (REM) sleep, and AD/ADRD biomarkers remains unclear.METHODSWe enrolled 128 adults (64 with Alzheimer's disease, 41 with mild cognitive impairment [MCI], and 23 with normal cognition [NC]), mean age 70.8 ±… Continue reading Association of rapid eye movement #sleep latency with multimodal biomarkers of #Alzheimer’s disease
Associations of #semaglutide with first-time diagnosis of #Alzheimer’s disease in patients with type 2 diabetes: Target trial emulation using nationwide real-world data in the US
INTRODUCTIONEmerging preclinical evidence suggests that semaglutide, a glucagon-like peptide receptor agonist (GLP-1RA) for type 2 diabetes mellitus (T2DM) and obesity, protects against neurodegeneration and neuroinflammation. However, real-world evidence for its ability to protect against Alzheimer's disease (AD) is lacking.METHODSWe conducted emulation target trials based on a nationwide database of electronic health records (EHRs) of 116… Continue reading Associations of #semaglutide with first-time diagnosis of #Alzheimer’s disease in patients with type 2 diabetes: Target trial emulation using nationwide real-world data in the US
The #dopaminergic system promotes neprilysin-mediated degradation of #amyloid-β in the brain
Deposition of amyloid-β (Aβ) in the brain can impair neuronal function and contribute to cognitive decline in Alzheimer’s disease (AD). Here, we found that dopamine and the dopamine precursor levodopa (also called l-DOPA) induced Aβ degradation in the brain. Chemogenetic approaches in mice revealed that the activation of dopamine release from ventral tegmental area (VTA) neurons… Continue reading The #dopaminergic system promotes neprilysin-mediated degradation of #amyloid-β in the brain
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