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Alzheimers

All articles tagged with #alzheimers

Sleep unlocks brain's toxin-cleaning system, scientists say
science6 days ago

Sleep unlocks brain's toxin-cleaning system, scientists say

A review published in Science argues that sleep drives a brain-cleaning process via the glymphatic system that clears waste such as amyloid-beta and tau. This flow is coordinated by shifts in neuromodulators and heart-rate variability, potentially detectable with smartwatches, and could signal brain health risks. The work reinforces sleep as essential for preventing dementia, though more human studies are needed to confirm how sleep disruption contributes to disease and to explore future therapies.

via Financial Times|
#alzheimers#brain#glymphatic-system
Recharging the brain's engines restores memory in dementia-model mice
health-and-medicine11 days ago

Recharging the brain's engines restores memory in dementia-model mice

Scientists developed a tool to temporarily boost mitochondrial activity in the brain, and in mouse models of neurodegenerative disease this restored memory performance, suggesting energy failure in neurons may drive cognitive decline and could become a new therapeutic target—though the approach is still far from human use and requires extensive safety and efficacy studies.

via ScienceDaily|
#alzheimers#dementia#health-and-medicine
Eggs Linked to Lower Alzheimer’s Risk in Large Long-Term Study
health22 days ago

Eggs Linked to Lower Alzheimer’s Risk in Large Long-Term Study

A long-running Adventist Health Study-2 found that regular egg consumption is associated with a lower risk of Alzheimer's disease in older adults, with those eating eggs two to four times per week about 20% less likely and five or more times per week about 27% less likely, after adjusting for age and lifestyle. The nutrients in eggs—choline, omega-3s, and vitamin B12—may support brain health, but the study does not prove causation and may not generalize beyond health-conscious populations; more research is needed to understand how diet affects brain health.

via WZTV|
#alzheimers#brain-health#choline
Midlife clues reveal Alzheimer’s may start decades before memory loss
science25 days ago

Midlife clues reveal Alzheimer’s may start decades before memory loss

A Mayo Clinic study finds Alzheimer’s-related changes can begin in people’s late 50s, decades before memory problems, outlining a two-phase timeline where amyloid buildup appears first, followed by other biomarkers and cognitive changes as people age, with blood and imaging signals peaking later. The research warns that averages don’t predict an individual's onset and suggests earlier, smarter screening and planning, while noting limitations in population diversity and the need for clearer clinical guidelines.

via Earth.com|
#aging#alzheimers#amyloid-beta
Alzheimer's blood tests spark debate over predicting risk and guiding care
health1 month ago

Alzheimer's blood tests spark debate over predicting risk and guiding care

Alzheimer's blood tests that detect amyloid or tau are being considered for early risk assessment, but doctors say their predictive value for asymptomatic people is uncertain, with potential false positives/negatives and no clear benefit from early intervention; FDA has cleared two tests for symptomatic patients, not for screening; patient interest is high, with surveys showing many would take a test if advised, though distress is common.

via NBC News|
#alzheimers#amyloid#blood-tests
Brain Switch Uncovered That Could Prevent Alzheimer’s Memory Loss
science1 month ago

Brain Switch Uncovered That Could Prevent Alzheimer’s Memory Loss

UCSD researchers used an AI-driven approach to identify chromogranin A as a molecular switch deciding whether Alzheimer’s pathology translates into memory loss. In tauopathy mice, removing CgA preserved learning and memory despite brain pathology, with females showing stronger protection. They also found catestatin, a peptide derived from CgA, which lowered disease markers and protected cognition across several mouse models. All findings are preclinical and require replication, dosing, safety studies, and regulatory review before any human testing, but the work aims to shift Alzheimer’s research toward prevention-based strategies.

via Hoodline|
#alzheimers#catestatin#chromogranin-a
Stress protein linked to resilience against Alzheimer's decline, study finds
science1 month ago

Stress protein linked to resilience against Alzheimer's decline, study finds

Researchers report a 40-gene pattern that distinguishes normal aging, symptomatic Alzheimer's, and a resilient state, and identify Chromogranin A (CgA) as a stress-related protein that links cellular stress to Tau tangles. In mice, removing CgA reduced Tau buildup and preserved memory, especially in females, suggesting resilience pathways can sustain cognition despite brain damage. While promising, these findings are in animals and must be validated in humans, with resilience markers potentially guiding early prevention.

via Earth.com|
#alzheimers#asymptomatic-alzheimers#chromogranin-a
Amyloid-targeting Alzheimer’s drugs fall short on patient benefit, review finds
health1 month ago

Amyloid-targeting Alzheimer’s drugs fall short on patient benefit, review finds

A Cochrane review of 17 trials with over 20,000 people with mild cognitive impairment or early dementia found that seven anti-amyloid drugs, including donanemab and lecanemab, do not deliver a clinically meaningful benefit, even though they reduce brain amyloid. The findings challenge the idea that removing amyloid improves patient outcomes and have fueled ongoing debate over the amyloid hypothesis and the drugs’ high costs and risks.

via ScienceAlert|
#alzheimers#amyloid#clinical-trials
Cochrane review questions real-world benefits of anti-amyloid Alzheimer's drugs
health1 month ago

Cochrane review questions real-world benefits of anti-amyloid Alzheimer's drugs

A new Cochrane analysis of 17 trials (over 20,000 participants) finds amyloid-beta–targeting monoclonal antibodies, including Leqembi and Kisunla, likely confer little to no meaningful cognitive or functional benefit in mild cognitive impairment or mild Alzheimer's, while modestly increasing the risk of ARIA-E (brain swelling); despite some trial-specific benefits for individual drugs, the overall class effect is in doubt, prompting calls to pursue other disease mechanisms.

via Fierce Pharma|
#alzheimers#anti-amyloid#aria
New analysis questions real benefit of amyloid-clearing Alzheimer's drugs
health1 month ago

New analysis questions real benefit of amyloid-clearing Alzheimer's drugs

A Cochrane Collaboration analysis of 17 trials involving over 20,000 people finds that amyloid-clearing Alzheimer's drugs slow decline but do not meaningfully improve patients’ lives, while carrying risks and costing up to £90,000 for an 18‑month course; the findings have sparked debate among experts, with some arguing for nuanced interpretation and others defending potential benefits, and the NHS continuing not to fund them.

via BBC|
#alzheimers#amyloid#cost