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Related Concept Videos

Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

749
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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Related Experiment Video

Updated: Jan 7, 2026

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

Patrick J Smith1, Kim G Johnson2, Heidi L Roth3

  • 1University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.

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

Psychosocial factors like depression and rural living are linked to cognitive decline and Alzheimer's Disease and Related Dementias (ADRD) biomarkers. These findings highlight the importance of mental health and environment in ADRD risk assessment.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Gerontology

Background:

  • Psychosocial factors, including mood and residential status, may influence Alzheimer's Disease and Related Dementias (ADRD) risk.
  • Few studies have explored the connection between these factors and ADRD cerebrospinal fluid (CSF) biomarkers, crucial for early detection.

Purpose of the Study:

  • To investigate the associations between psychosocial functioning, cognitive performance, and ADRD biomarker profiles in adults.
  • To examine how depressive symptoms and urban/rural residency relate to cognitive domains and specific CSF markers.

Main Methods:

  • The study analyzed data from 243 participants in the Duke-UNC ADRC cohort, with 162 undergoing CSF biomarker analysis.
  • Depressive symptoms (Geriatric Depression Scale) and residential status (urban/rural) were assessed. CSF markers included Aβ42/40, p-tau181, and NfL.
  • General linear models were used to examine associations, controlling for demographic and genetic factors.

Main Results:

  • Elevated depressive symptoms correlated with poorer memory function and higher p-tau181 levels, with this association varying by age.
  • Rural residents exhibited lower Executive, Language, and Visuospatial Function (ELVF) performance and higher neurofilament light (NfL) levels compared to urban residents.

Conclusions:

  • Psychosocial characteristics are associated with cognitive function and ADRD biomarkers in middle-aged adults.
  • These findings suggest that mood and environment may play a role in the early stages of ADRD.