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Age-Related Differences in the Choroid Plexus Structural Integrity Are Associated with Changes in Cognition.
Zhaoyuan Gong1, Angelique de Rouen1, Nathan Zhang1
1Laboratory of Clinical Investigation, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA.
Medrxiv : the Preprint Server for Health Sciences
|March 10, 2025
Summary
Reduced choroid plexus (CP) integrity, measured by MRI, is linked to faster cognitive decline in aging. This suggests CP health is crucial for maintaining brain function and may serve as an early biomarker for cognitive impairment.
Area of Science:
- Neuroscience
- Radiology
- Gerontology
Background:
- The choroid plexus (CP) is vital for central nervous system (CNS) homeostasis and regulating blood-brain barrier function.
- CP dysfunction is associated with neurological and psychiatric disorders, including Alzheimer's and Parkinson's disease.
Purpose of the Study:
- To investigate the relationship between choroid plexus structural integrity and cognitive decline during normal aging.
- To assess if CP microstructural measures are more sensitive to cognitive decline than macrostructural measures.
Main Methods:
- Employed structural and advanced magnetic resonance imaging (MRI) techniques.
- Analyzed CP volume, diffusion tensor imaging (DTI) indices (mean diffusivity, MD; fractional anisotropy, FA), and relaxometry metrics (T1, T2 relaxation times).
- Utilized longitudinal analysis and structural equation modeling to assess cognitive decline over time.
Main Results:
- Diminished CP microstructural integrity (higher T1, T2, MD; lower FA) correlated with poorer cognitive performance in processing speed and fluency.
- CP microstructural integrity was a more sensitive indicator of cognitive decline than CP volume.
- Reduced CP structural integrity predicted steeper cognitive decline over time, comparable in effect size to age.
Conclusions:
- CP structural integrity is a significant factor in maintaining cognitive health during aging.
- CP integrity measures show promise as sensitive biomarkers for early detection of cognitive decline.
- Further research is needed to understand the underlying mechanisms and therapeutic potential of targeting CP function.
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