Age-related decline in blood-brain barrier function is more pronounced in males than females in parietal and temporal regions
- PMID: 39495221
- PMCID: PMC11534331
- DOI: 10.7554/eLife.96155
Age-related decline in blood-brain barrier function is more pronounced in males than females in parietal and temporal regions
Abstract
The blood-brain barrier (BBB) plays a pivotal role in protecting the central nervous system (CNS), and shielding it from potential harmful entities. A natural decline of BBB function with aging has been reported in both animal and human studies, which may contribute to cognitive decline and neurodegenerative disorders. Limited data also suggest that being female may be associated with protective effects on BBB function. Here, we investigated age and sex-dependent trajectories of perfusion and BBB water exchange rate (kw) across the lifespan in 186 cognitively normal participants spanning the ages of 8-92 years old, using a non-invasive diffusion-prepared pseudo-continuous arterial spin labeling (DP-pCASL) MRI technique. We found that the pattern of BBB kw decline with aging varies across brain regions. Moreover, results from our DP-pCASL technique revealed a remarkable decline in BBB kw beginning in the early 60 s, which was more pronounced in males. In addition, we observed sex differences in parietal and temporal regions. Our findings provide in vivo results demonstrating sex differences in the decline of BBB function with aging, which may serve as a foundation for future investigations into perfusion and BBB function in neurodegenerative and other brain disorders.
Keywords: aging; arterial spin labeling; blood-brain barrier; human; neuroscience; sex difference; water exchange rate.
© 2024, Shao et al.
Conflict of interest statement
XS, QS, KF, BO, XJ, BG, MH, EG, PK, EH, IP, MB, HK, SC, KJ, DW No competing interests declared
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Update of
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Age-Related Decline in Blood-Brain Barrier Function is More Pronounced in Males than Females in Parietal and Temporal Regions.bioRxiv [Preprint]. 2024 Jun 11:2024.01.12.575463. doi: 10.1101/2024.01.12.575463. bioRxiv. 2024. Update in: Elife. 2024 Nov 04;13:RP96155. doi: 10.7554/eLife.96155. PMID: 38293052 Free PMC article. Updated. Preprint.
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