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Related Concept Videos

Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
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Cardiac myocytes produce these hormones in response to ventricular stretching...
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Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies
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Biomarkers.

Valentin Ourry1,2, Ting Qiu1,2, Daniel C Bowie1,3

  • 1Douglas Mental Health University Institute, Centre for Studies on the Prevention of Alzheimer's Disease (StoP-AD), Montréal, QC, Canada.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 24, 2025
PubMed
Summary
This summary is machine-generated.

Untreated hyperlipidemia and hypertension accelerate amyloid-related tau pathology in Alzheimer's disease (AD). Managing these vascular risk factors may mitigate AD progression.

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Area of Science:

  • Neurology
  • Neuroscience
  • Gerontology

Background:

  • Vascular risk factors are linked to increased Alzheimer's disease (AD) dementia risk.
  • Previous research shows complex interactions between vascular pathology and AD.
  • This study investigates individual vascular risk factors' association with amyloid and tau burden in cognitively normal individuals.

Purpose of the Study:

  • To evaluate associations between individual vascular risk factors and amyloid/tau burden.
  • To determine if vascular factors and their treatments influence the amyloid-tau relationship.
  • To explore how hypertension and hyperlipidemia treatments affect AD pathology progression.

Main Methods:

  • Positron emission tomography ([18F]-NAV4694 and [18F]-AV1451) was used on 241 cognitively unimpaired older adults.
  • Associations between vascular factors (ApoE status, BMI, cholesterol, blood pressure) and amyloid-beta (Aβ) or tau burden were examined.
  • Interactions between Aβ, vascular factors, and treatments were analyzed to predict tau burden.

Main Results:

  • ApoE4 status significantly correlated with amyloid burden and its change.
  • Abnormal HDL cholesterol and diastolic blood pressure levels intensified tau PET increase at given amyloid PET levels.
  • Untreated hypertension showed a stronger amyloid-related increase in tau, with treatments alleviating this effect.

Conclusions:

  • Untreated hyperlipidemia and hypertension are linked to accelerated amyloid-related tau pathology in AD.
  • Hypertension treatment appears to mitigate the influence of vascular risk factors on tau pathology.
  • These findings highlight the importance of managing vascular health in AD prevention.