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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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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.

Connor Lee Cornelison1,2, Qiuting Wen2, Plamena P Powla2

  • 1Indiana University, Bloomington, IN, USA.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 26, 2025
PubMed
Summary
This summary is machine-generated.

Women with Mild Cognitive Impairment (MCI) show distinct brain connectivity changes compared to men. This study found significant differences in orientation dispersion (OD) structural connectivity in females, particularly in the accumbens and temporopolar regions.

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Alzheimer's Disease Research

Background:

  • Alzheimer's disease (AD) disproportionately affects women, representing two-thirds of U.S. adults with AD symptoms.
  • Brain structural connectivity, particularly orientation dispersion (OD) structural connectivity, offers insights into AD-related brain changes.
  • Prior research suggests a link between reduced OD connections and AD development.

Purpose of the Study:

  • To investigate differences in OD-based structural connectivity between healthy controls and individuals with Mild Cognitive Impairment (MCI).
  • To explore potential sex-based differences in brain structural connectivity alterations associated with MCI.

Main Methods:

  • Utilized data from 100 participants (71 female, 29 male) from the Indiana Memory and Aging Study (IMAS).
  • Employed a novel latent space framework to detect group differences by estimating group-level structural connectivity.
  • Applied Bayesian inference to identify significant connectivity differences between cognitively unimpaired (CU) and MCI participants.

Main Results:

  • Females with MCI exhibited statistically significant changes in OD-based structural connectivity (p<0.005), unlike males.
  • Specific alterations in females included increased connectivity in the left accumbens and decreased connectivity in the right temporopolar region compared to CU females.
  • These findings highlight sex-specific patterns of brain connectivity changes in the early stages of cognitive decline.

Conclusions:

  • The accumbens and temporopolar regions are recognized for their roles in AD.
  • This study identified sex-specific differences in structural connectivity related to AD pathology.
  • Women with MCI show consistent impacts on the left accumbens and right temporopolar regions, underscoring the importance of sex-specific research in AD.