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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.

Daniel Willie-Permor1,2, Oscar L Lopez3,4, Steven E Reis1

  • 1University of Pittsburgh, Pittsburgh, PA, USA.

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

Health behaviors and demographics predict resilience and resistance to Alzheimer's disease (AD) pathologies like tau and amyloid. Understanding these factors is key to cognitive health in aging populations.

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Area of Science:

  • Neuroscience
  • Gerontology
  • Medical Imaging

Background:

  • Alzheimer's disease (AD) cognitive impairment (CI) is linked to tau and amyloid pathologies.
  • Individual responses to AD pathologies vary, with some showing resilience or resistance.
  • Health behaviors and demographics may offer protection against AD pathologies.

Purpose of the Study:

  • Identify predictors of resistance and resilience to tau and amyloid pathology in Alzheimer's disease.
  • Investigate the role of health behaviors, demographics, and clinical variables in cognitive protection.

Main Methods:

  • Utilized PET imaging ([18F]Flortaucipir for tau, [11C]Pittsburgh Compound-B for amyloid) in 152 participants from the Heart SCORE study.
  • Categorized cognition as unimpaired or impaired (MCI/dementia).
  • Employed logistic regression to identify predictors of resistance/resilience and survival analysis for cognitive transitions.

Main Results:

  • Cognitive activity and White race were associated with tau resilience.
  • Social, leisure, and household activities, along with education, predicted amyloid resistance.
  • Amyloid and tau positivity predicted progression to MCI/dementia, while CVD history, White race, and cognitive activity showed protective effects.

Conclusions:

  • Tau and amyloid pathology significantly influence cognitive transitions in Alzheimer's disease.
  • Health behaviors, demographics, and cardiovascular disease history are crucial factors in AD resistance and resilience.