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Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

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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.
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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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Updated: Jan 7, 2026

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

Olivier Parent1,2, Sophia Osborne1, Gabriel A Devenyi1,2

  • 1McGill University, Montreal, QC, Canada.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 25, 2025
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Summary
This summary is machine-generated.

Women generally have more white matter hyperintensities (WMH) and severe pathophysiology than men. However, men show higher WMH volume and worse orientation dispersion in posterior regions, indicating complex sex-specific patterns.

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Area of Science:

  • Neuroimaging
  • Neuropathology
  • Biomarkers

Background:

  • White matter hyperintensity (WMH) pathophysiology varies regionally, involving edema, inflammation, demyelination, and axonal degeneration.
  • Women exhibit a higher WMH burden than men from midlife, potentially due to estrogen reduction during menopause.
  • Detailed spatial characterization of WMH pathophysiology across sexes is currently lacking.

Purpose of the Study:

  • To investigate sex differences in the spatial patterns of white matter hyperintensity (WMH) pathophysiology.
  • To characterize in vivo WMH pathophysiology at high spatial resolution using microstructural magnetic resonance imaging (MRI).

Main Methods:

  • Utilized UK Biobank data (n=32,526) with diffusion- and susceptibility-weighted MRI to derive microstructural markers.
  • Applied normative modeling to establish age- and sex-specific healthy white matter microstructure values.
  • Employed spectral clustering to identify spatial WMH pathophysiology clusters (periventricular, posterior, anterior) and analyzed sex differences using linear models.

Main Results:

  • Females generally displayed higher WMH volumes and more severe WMH pathophysiology.
  • Males showed higher WMH volume and worse orientation dispersion (OD) pathophysiology in posterior WMHs.
  • When controlling for WMH volume, females exhibited strong effects in periventricular and posterior regions, while OD showed significantly higher effects in males within the periventricular region.

Conclusions:

  • WMHs exhibit nuanced, sex-specific spatial effects.
  • Females have more WMHs but similar anterior WMH pathophysiology compared to males.
  • Males present higher WMH volumes but reduced posterior WMH pathophysiology compared to females.