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Arterial stiffness moderates the link between NfL and cognition: The IGNITE study
Journal article   Open access   Peer reviewed

Arterial stiffness moderates the link between NfL and cognition: The IGNITE study

Amani M Norling, Lewis A Lipsitz, Alyssa B Dufour, Thomas G Travison, Kelsey R Sewell, Audrey M Collins, Lu Wan, George Grove, Haiqing Huang, Lauren E Oberlin, …
Alzheimer's & dementia, Vol.21(8), e70554
2025
PMID: 40775489
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CC BY-NC-ND V4.0 Open Access

Abstract

Aged Aged, 80 and over Biomarkers - blood Carotid-Femoral Pulse Wave Velocity Cognition - physiology Cognitive Dysfunction - blood Cognitive Dysfunction - physiopathology Female Humans Male Neurofilament Proteins - blood Neuropsychological Tests Pulse Wave Analysis Vascular Stiffness - physiology
INTRODUCTION Arterial stiffness (carotid-femoral pulse wave velocity [cfPWV]) and plasma neurofilament light (NfL), markers of vascular and neuroaxonal aging, are linked to cognitive decline. Whether higher cfPWV amplifies the NfL–cognition relationship remains unclear. METHODS Cognitively unimpaired older adults (N = 570) were assessed using composite cognitive scores from confirmatory factor analysis. cfPWV was dichotomized at the median. Plasma NfL was quantified on a Single Moleculte Array-High Definition, model X (SIMOA-HD X). RESULTS Higher NfL correlated with poorer performance across all cognitive domains (p < 0.05), and higher cfPWV was linked to worse episodic memory, working memory, and processing speed (p < 0.05). NfL× cfPWV interactions were significant for episodic (β = 0.289, p = 0.048) and working memory (β = 0.287, p = 0.025), with stronger NfL–cognition associations in the higher cfPWV group (episodic memory: β = -0.324, p < 0.01; working memory: β = -0.343, p < 0.01). DISCUSSION Greater cfPWV amplified the association between NfL-related axonal degeneration and cognitive decline.

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