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Age-related differences in choroid plexus structural integrity are associated with changes in cognition.

Zhaoyuan Gong¹, Angelique de Rouen², Nathan Zhang²

¹Laboratory of Clinical Investigation, National Institute on Aging, National Institutes of Health, Baltimore, MD, 21224, USA. zhaoyuan.gong@nih.gov.

Fluids and Barriers of the CNS

|December 18, 2025

Summary

Choroid plexus (CP) integrity is vital for cognitive health. Lower CP microstructural integrity correlates with faster cognitive decline, suggesting it as a sensitive biomarker for aging brains.

Keywords:

Biomarker Choroid plexus Cognition Longitudinal MRI Microstructure

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Area of Science:

Neuroscience
Aging Research
Biomarker Discovery

Background:

The choroid plexus (CP) is crucial for central nervous system (CNS) homeostasis and cerebrospinal fluid production.
CP dysfunction is linked to neurological disorders like Alzheimer's and Parkinson's disease.

Purpose of the Study:

To investigate the association between choroid plexus (CP) structural integrity and cognitive decline in aging.
To determine if CP microstructural integrity is a sensitive indicator of cognitive aging.

Main Methods:

Employed advanced magnetic resonance imaging (MRI) techniques.
Measured CP volume, diffusion tensor imaging (DTI) indices (MD, FA), and relaxometry metrics (T1, T2 relaxation times).

Main Results:

Lower CP microstructural integrity (higher T1, T2, MD; lower FA) correlated with poorer cognitive performance (processing speed, fluency).
CP microstructural measures were more sensitive to cognitive decline than CP volume.
Lower CP integrity predicted steeper cognitive decline over time, comparable to age effects.

Conclusions:

CP integrity is important for maintaining cognitive health during aging.
Assessing CP integrity may serve as a sensitive biomarker for early cognitive decline detection.
Further research should explore mechanisms and therapeutic targets related to CP function in cognitive aging.