ArticleStroke and vascular neurology2026
Vascular β-amyloid potentially colocalises with phosphorylated tau in cerebral amyloid angiopathy.
Article in Stroke and vascular neurology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundTau pathology is observed in cerebral amyloid angiopathy (CAA) and is related to cognitive impairment and neurodegeneration. However, the relationship between tau pathology and amyloid accumulation in the vasculature is unknown. We aimed to assess if regional associations exist between vascular amyloid and tau protein in sporadic CAA.
methodWe assessed cerebral amyloid and hyperphosphorylated tau in patients with probable CAA or Alzheimer's disease (AD) using
results67 patients with CAA (38 with intracerebral haemorrhage and 29 with cognitive impairment) and 21 patients with AD were included. Significant correlations between amyloid and tau PET uptake were observed in regions of interest for the temporal, parietal and occipital lobes in CAA (adjusted p<0.05); these correlations were not observed in AD. In CAA, the severity of regional cSS correlated positively with T807 uptake in the temporal (β=0.108, 95% CI 0.030 to 0.186, p=0.007) and occipital lobes (β=0.088, 95% CI 0.008 to 0.168, p=0.032). Regional cSS showed no mediating effect on the association between PiB and T807 in the occipital and temporal lobes.
conclusionsIn CAA, tau pathology exhibits significant regional in situ correlations with amyloid deposition in the posterior brain, which suggests a distinct pathophysiology to AD.
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