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Utility of Cerebrovascular Imaging Biomarkers to Detect Cerebral Amyloidosis

Overview
Specialties Neurology
Psychiatry
Date 2024 Sep 2
PMID 39219209
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Abstract

Introduction: The relationship between cerebrovascular disease (CVD) and amyloid beta (Aβ) in Alzheimer's disease (AD) is understudied. We hypothesized that magnetic resonance imaging (MRI)-based CVD biomarkers-including cerebral microbleeds (CMBs), lacunar infarction, and white matter hyperintensities (WMHs)-would correlate with Aβ positivity on positron emission tomography (Aβ-PET).

Methods: We cross-sectionally analyzed data from the Alzheimer's Disease Neuroimaging Initiative (ADNI, N = 1352). Logistic regression was used to calculate odds ratios (ORs), with Aβ-PET positivity as the standard-of-truth.

Results: Following adjustment, WMHs (OR = 1.25) and superficial CMBs (OR = 1.45) remained positively associated with Aβ-PET positivity (p < 0.001). Deep CMBs and lacunes exhibited a varied relationship with Aβ-PET in cognitive subgroups. The combined diagnostic model, which included CVD biomarkers and other accessible measures, significantly predicted Aβ-PET (pseudo-R= 0.41).

Discussion: The study highlights the translational value of CVD biomarkers in diagnosing AD, and underscores the need for more research on their inclusion in diagnostic criteria.

Clinicaltrials: gov: ADNI-2 (NCT01231971), ADNI-3 (NCT02854033).

Highlights: Cerebrovascular biomarkers linked to amyloid beta (Aβ) in Alzheimer's disease (AD). White matter hyperintensities and cerebral microbleeds reliably predict Aβ-PET positivity. Relationships with Aβ-PET vary by cognitive stage. Novel accessible model predicts Aβ-PET status. Study supports multimodal diagnostic approaches.

Citing Articles

Utility of cerebrovascular imaging biomarkers to detect cerebral amyloidosis.

Howe M, Caruso M, Manoochehri M, Kunicki Z, Emrani S, Rudolph J Alzheimers Dement. 2024; 20(10):7220-7231.

PMID: 39219209 PMC: 11485066. DOI: 10.1002/alz.14207.

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