Spatiotemporal patterns of locus coeruleus integrity predict cortical tau and cognition

Elisenda Bueichekú, Ibai Diez, Chan-Mi Kim, John Alex Becker, Elouise A Koops, Kenneth Kwong, Kathryn V Papp, David H Salat, David A Bennett, Dorene M Rentz, Reisa A Sperling, Keith A Johnson, Jorge Sepulcre*, Heidi I L Jacobs*

*Corresponding author for this work

Research output: Contribution to journalComment/Letter to the editorAcademicpeer-review

Abstract

Autopsy studies indicated that the locus coeruleus (LC) accumulates hyperphosphorylated tau before allocortical regions in Alzheimer's disease. By combining in vivo longitudinal magnetic resonance imaging measures of LC integrity, tau positron emission tomography imaging and cognition with autopsy data and transcriptomic information, we examined whether LC changes precede allocortical tau deposition and whether specific genetic features underlie LC's selective vulnerability to tau. We found that LC integrity changes preceded medial temporal lobe tau accumulation, and together these processes were associated with lower cognitive performance. Common gene expression profiles between LC-medial temporal lobe-limbic regions map to biological functions in protein transport regulation. These findings advance our understanding of the spatiotemporal patterns of initial tau spreading from the LC and LC's selective vulnerability to Alzheimer's disease pathology. LC integrity measures can be a promising indicator for identifying the time window when individuals are at risk of disease progression and underscore the importance of interventions mitigating initial tau spread.
Original languageEnglish
Pages (from-to)625-637
Number of pages13
JournalNature aging
Volume4
Issue number5
DOIs
Publication statusPublished - May 2024

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