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Area of Science:

  • Neuroscience
  • Immunology
  • Gerontology

Background:

  • Alzheimer's disease (AD) is linked to inflammatory markers, but their specific relationship with cognitive function in AD patients and controls is less understood.
  • Peripheral inflammation markers (pro- and anti-inflammatory) are increasingly recognized as potential factors influencing AD.
  • Previous research highlights an association between inflammation and AD, necessitating further investigation into cognitive correlates.

Purpose of the Study:

  • To investigate the association between peripheral pro- and anti-inflammatory markers and neuropsychological functioning.
  • To differentiate the impact of these markers on cognitive performance in individuals with probable AD and healthy controls.
  • To utilize the Texas Alzheimer's Research and Care Consortium (TARCC) cohort for comprehensive analysis.

Main Methods:

  • Analysis of 320 participants from the TARCC Longitudinal Research Cohort (124 probable AD, 196 controls).
  • Regression analyses were employed to assess the relationship between inflammatory markers and neuropsychological test results.
  • Subgroup analyses were performed based on probable AD diagnosis versus control status.

Main Results:

  • Both pro-inflammatory and anti-inflammatory markers showed significant associations with neuropsychological test performance.
  • Higher levels of pro-inflammatory markers (third tertile) were linked to diminished performance in attention and language tasks.
  • Elevated anti-inflammatory markers correlated with improved immediate verbal memory and delayed verbal and visual memory recall.

Conclusions:

  • The study confirms a significant link between peripheral inflammatory markers and neuropsychological functioning in the context of AD.
  • Findings suggest that specific profiles of inflammatory markers may differentially influence cognitive domains.
  • Further research into comprehensive inflammatory marker profiles could offer insights into AD pathogenesis and cognitive decline.