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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

Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers

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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.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
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Video Experimental Relacionado

Updated: Jan 7, 2026

Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies
07:20

Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies

Published on: January 28, 2014

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Biomarcadores

Steve Nguyen1, Ake Lu2, Steve Horvath2

  • 1University of California San Diego, La Jolla, CA, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
PubMed
Resumen
Este resumen es generado por máquina.

La aceleración de la edad epigenética, medida por AgeAccelGrim2 y DunedinPACE, predice el deterioro cognitivo leve (MCI) y el riesgo de demencia en mujeres mayores. Estos estimadores de la edad biológica pueden ayudar a identificar a las personas con mayor riesgo de deterioro cognitivo.

Palabras clave:
envejecimiento epigenéticoaceleración de la edad epigenéticadeterioro cognitivo levedemenciamujeres mayoresbiomarcadoresDunedinPACEAgeAccelGrim2

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Área de la Ciencia:

  • Epigenetics and Aging
  • Neurodegenerative Diseases
  • Biomarkers of Aging

Sus antecedentes:

  • Epigenetic age estimators assess biological versus chronological age and link to health outcomes like CVD and mortality.
  • Few large studies have prospectively examined epigenetic age estimators concerning mild cognitive impairment (MCI) or dementia.

Objetivo del estudio:

  • To investigate the association between multiple epigenetic age estimators and the risk of developing MCI or dementia.
  • To evaluate the predictive power of various epigenetic age acceleration measures in a large cohort of women.

Principales métodos:

  • Utilized data from 5923 women in the Women's Health Initiative Memory Study, without MCI/dementia at baseline.
  • Calculated Horvath AA, Hannum AA, AgeAccelPheno, Intrinsic/extrinsic epigenetic AA, AgeAccelGrim2, and DunedinPACE.
  • Employed multivariable Cox proportional hazards models and evaluated effect modification by demographic and lifestyle factors.

Principales resultados:

  • Over 9.3 years, 1267 incident MCI/dementia events occurred.
  • Higher quartiles of DunedinPACE (HR=1.22) and AgeAccelGrim2 (HR=1.21) were associated with increased MCI/dementia risk (p-trend=0.02 and 0.01, respectively).
  • Non-linear association observed for DunedinPACE; other estimators showed no significant association.

Conclusiones:

  • Accelerated epigenetic age, indicated by AgeAccelGrim2 and DunedinPACE, predicts incident MCI/dementia in older women.
  • These findings suggest that epigenetic age acceleration could serve as a risk indicator for cognitive decline.
  • The study provides insights into the pathophysiological mechanisms linking biological aging to neurodegeneration.