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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

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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.

Chris Fox1,2, Jane Cross3, Henrik Zetterberg4,5,6,7

  • 1University of Exeter, Exeter, Devon, United Kingdom.

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

Acute hip fracture significantly increases axonal injury, especially in individuals with existing dementia. This suggests a link between fracture-induced inflammation, blood-brain barrier disruption, and accelerated brain damage in dementia patients.

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Area of Science:

  • Neuroscience
  • Gerontology
  • Inflammation Research

Background:

  • Inflammation is implicated in Alzheimer's disease (AD) and other dementias, but its exact role remains unclear.
  • Acute systemic inflammation, such as from infection or fracture, can accelerate dementia progression.
  • The ASCRIBED study investigated the link between hip fracture, inflammation, and brain injury in dementia.

Purpose of the Study:

  • To examine the relationship between acute hip fracture, systemic inflammation, and brain injury biomarkers.
  • To compare levels of axonal damage and blood-brain barrier integrity in patients with and without dementia following hip fracture.

Main Methods:

  • Recruited participants with dementia and hip fracture, hip fracture without dementia, and a control group with dementia but no acute illness.
  • Collected cerebrospinal fluid (CSF) and blood samples to measure inflammatory and brain injury biomarkers.
  • Analyzed neurofilament light chain (NFL) as an axonal damage marker and Qalbumin for blood-CSF barrier permeability.

Main Results:

  • Hip fracture led to significantly higher neurofilament light chain (NFL) levels, indicating increased axonal injury, particularly in those with co-existing dementia.
  • CSF NFL levels were strongly correlated with blood-CSF barrier permeability (Qalbumin), suggesting a link between axonal damage and BBB disruption.
  • Patients with dementia and hip fracture exhibited the highest NFL levels compared to other groups.

Conclusions:

  • Hip fracture causes significant acute axonal injury, exceeding that seen in stable dementia patients.
  • The severity of acute brain injury following hip fracture appears greater in individuals with pre-existing dementia.
  • Further research is warranted to understand the mechanisms of this injury and develop therapeutic interventions for brain damage associated with hip fracture in dementia.