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Cerebral Amyloid Angiopathy

All articles tagged with #cerebral amyloid angiopathy

science4 days ago•5 min saved

Could Alzheimer’s Pathology Be Transmitted Through Blood Transfusions?

A Lancet review explores whether amyloid-beta pathology linked to Alzheimer’s could spread via blood transfusions. While not proven, prior work hints at transferable amyloid via medical procedures, and a 2023 Danish-Swedish study found recipients of transfusions from donors who later developed brain bleeds had higher recurrence risk, a clue connected to cerebral amyloid angiopathy. Experts urge caution, noting insufficient data to quantify risk, but advocate large-scale epidemiological studies and potential safeguards (donor biomarker screening, enhanced monitoring for high-risk patients). The UK infected blood inquiry is cited as a cautionary example of delaying safety measures, underscoring the need for transparency and preparedness.

via ScienceAlert|

#alzheimers #amyloid-beta #blood-transfusion

science17 days ago•5 min saved

Rare Flemish Alzheimer's mutation uncovers a novel amyloid fold fueling vascular brain damage

A rare Flemish APP mutation in Alzheimer's alters the folding of amyloid-beta into a previously unseen Z-shaped filament that tends to accumulate around brain vessels, driving cerebral amyloid angiopathy and hemorrhage. Using cryo-EM, researchers show how loss of a methyl group at residue 21 promotes this vascular-prone fold, offering new targets for therapies and broader insight into Alzheimer’s pathology across its variants.

via ScienceAlert|

#alzheimers-disease #amyloid-beta #cerebral-amyloid-angiopathy

health6 months ago•6 min saved

Common Brain Vessel Condition May Quadruple Dementia Risk in Seniors, Large Study Shows

A large, preliminary analysis of nearly 2 million Medicare beneficiaries aged 65+ links cerebral amyloid angiopathy (CAA)—protein buildup in brain vessels—to about a fourfold increase in dementia risk over five years; roughly 42% of those with CAA developed dementia versus 10% without, with risk remaining high even without prior stroke. Researchers urge proactive cognitive screening after a CAA diagnosis, though the study relies on administrative codes and lacks brain imaging; findings were presented at the American Stroke Association conference and may undergo peer review.

via Fox News|

#aging #alzheimers-disease #cerebral-amyloid-angiopathy

health7 months ago•6 min saved

Hidden Brain Vessel Protein Tied to Quadrupled Dementia Risk

A Medicare study of about 1.9 million older adults (2016–2022) found cerebral amyloid angiopathy (CAA)—amyloid buildup in brain vessels—nearly quadruples five‑year dementia risk, with or without prior stroke. CAA alone raised dementia risk to ~4.3× and stroke alone to ~2.4×; having both CAA and stroke increased risk to ~4.5×. The results imply non-stroke mechanisms drive cognitive decline in CAA and underscore the need for early cognitive screening after diagnosis. Limitations include reliance on claims data and lack of imaging, with findings reported as an ASA conference abstract rather than a peer‑reviewed study.

via SciTechDaily|

#cerebral-amyloid-angiopathy #cognitive-screening #dementia-risk

medical-research3 years ago•1 min saved

The Link Between Blood Transfusion and Brain Amyloidosis: A Cause for Concern?

Experimental and clinical data suggest that misfolding of the amyloid β peptide, a key component of Alzheimer's disease and cerebral amyloid angiopathy (CAA), can be transmitted prion-like. Studies have shown the development of cerebral amyloid deposition after intracerebral injection of amyloid β in animals, and similar findings have been observed in humans treated with pituitary-derived human growth hormone. Clinical reports have also linked iatrogenic CAA cases to neurosurgical procedures involving cadaveric grafts. While this represents a devastating illness for affected individuals, it is only a small portion of the overall burden of CAA and Alzheimer's disease.

via JAMA Network|

#alzheimers-disease #blood-transfusion #brain-amyloidosis

health3 years ago•5 min saved

Eye Blood Vessel Changes: A Promising Alzheimer's Diagnostic Tool

Abnormalities in eye blood vessels, specifically a disruption in the blood-retinal barrier, could provide early diagnosis of Alzheimer’s disease and tracking of its progression. The damage to the blood-retinal barrier was strongly linked with cerebral amyloid angiopathy (CAA), a condition associated with Alzheimer’s. Advanced retinal imaging, currently under development, could noninvasively monitor these changes in eye blood vessels to detect Alzheimer’s in living patients.

via Neuroscience News|

#alzheimers-disease #cerebral-amyloid-angiopathy #early-diagnosis