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Related Concept Videos

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.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
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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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Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies
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Biomarkers.

Laura Alejandra Ramirez Tirado1, Ann D Cohen1,2,3,4,5, C Elizabeth Shaaban1,3

  • 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.

Peripheral inflammation and astrogliosis synergistically impact Alzheimer's disease markers. This interaction influences amyloid accumulation, vascular damage, and neurodegeneration, particularly in individuals with amyloid-beta positivity.

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Area of Science:

  • Neuroscience
  • Immunology
  • Gerontology

Background:

  • Systemic inflammation and astrogliosis are key features in Alzheimer's disease (AD).
  • The interplay between peripheral inflammation and astrogliosis in AD pathogenesis requires further investigation.
  • Understanding these interactions may reveal novel therapeutic targets for AD.

Purpose of the Study:

  • To investigate the synergistic effects of peripheral inflammation and astrogliosis on key Alzheimer's disease (AD) biomarkers.
  • To examine the impact of these combined factors on beta-amyloid (Aβ) burden and accumulation, vascular markers, and neurodegeneration.
  • To explore these relationships across the spectrum of AD.

Main Methods:

  • Utilized data from the Ginkgo Evaluation of Memory Study, including PiB-PET scans and immunoassay measurements of inflammatory markers (CRP, TNF-R1, TNF-R2, IL-6, IL-2, sCD14) and astrogliosis (GFAP).
  • Analyzed relationships between peripheral inflammation, astrogliosis, Aβ burden/accumulation, white matter lesion (WML) volume, and neurodegeneration (NfL) using negative binomial regression models.
  • Adjusted for relevant covariates including age, sex, education, APOEε4 status, and baseline Aβ status.

Main Results:

  • A significant negative multiplicative interaction between GFAP (astrogliosis) and CRP (inflammation) was observed on Aβ accumulation.
  • Astrogliosis (GFAP) interacted synergistically with CRP, TNFR1, and TNFR2 to predict increased white matter lesion (WML) volume.
  • Joint effects of astrogliosis with CRP, sCD14, and TNFR1 were significant for neurodegeneration (NfL), with additive/multiplicative interactions observed.

Conclusions:

  • In an elderly population (85+), peripheral inflammation markers (CRP, TNFR1, TNFR2) exhibit synergistic effects with astrogliosis.
  • These combined effects are associated with reduced amyloid accumulation, increased vascular burden, and greater neurodegeneration, especially in amyloid-positive individuals.
  • Increased inflammation may contribute to AD pathogenesis by accelerating progression towards the amyloid asymptote.