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Related Concept Videos

Primary Healthcare Services01:30

Primary Healthcare Services

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Primary care promotes wellness and prevents disease. This care includes health promotion, education, protection (such as immunizations), early disease screening, and environmental considerations. Settings providing this type of healthcare include physician offices, public health clinics, school nursing, and community health nursing.
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Disease surveillance is the systematic collection, analysis, and interpretation of health data essential to the planning, implementation, and evaluation of public health practice. This process integrates data dissemination to entities responsible for preventing and controlling disease, injury, and disability. Surveillance systems provide crucial information for action, helping public health authorities make informed decisions to manage and prevent outbreaks, ensure public safety, optimize...
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Determining Soil-transmitted Helminth Infection Status and Physical Fitness of School-aged Children
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Public Health.

Stephanie Yiallourou1, Madeline Gibson2, Emma Louise Palatsides3

  • 1School of Psychological Sciences & Turner Institute for Brain and Mental Health, Monash University, Melbourne, VIC, Australia.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 23, 2025
PubMed
Summary
This summary is machine-generated.

Short sleep duration and poor blood pressure (BP) dipping are linked to increased neurofilament light chain (NfL) levels, a marker of neuronal damage. This suggests a combined risk for brain health in individuals with nocturnal hypertension.

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Area of Science:

  • Neurology
  • Sleep Medicine
  • Cardiology

Background:

  • The link between short sleep and Alzheimer's disease (AD) risk is unclear.
  • Short sleep may increase AD risk through nocturnal hypertension, a condition where blood pressure (BP) doesn't dip sufficiently during sleep.
  • This study investigates if BP dipping status modifies the association between sleep duration and AD biomarkers.

Purpose of the Study:

  • To determine if blood pressure (BP) dipping status moderates the relationship between sleep duration and plasma biomarkers associated with Alzheimer's disease (AD).
  • To explore the impact of nocturnal hypertension on neurodegeneration markers in relation to sleep patterns.

Main Methods:

  • 92 dementia-free adults (≥55 years) underwent polysomnography and 24-hour ambulatory BP monitoring.
  • Plasma biomarkers (p-Tau217, GFAP, Aβ42/Aβ40, NfL) were measured using SIMOA.
  • Participants were classified as BP Dippers (≥10% nocturnal BP dip) or Non-Dippers (<10% dip, indicating nocturnal hypertension). Linear regressions analyzed sleep duration and biomarker associations, with interaction terms for BP dipping status.

Main Results:

  • BP dipping status significantly moderated the association between sleep duration and neurofilament light chain (NfL) levels.
  • Shorter sleep duration correlated with higher NfL in Non-Dippers (nocturnal hypertension), but not in BP Dippers.
  • Higher slow-wave sleep (N3%) was also associated with increased NfL in Non-Dippers, but not in BP Dippers.

Conclusions:

  • In individuals with nocturnal hypertension (Non-Dippers), shorter sleep duration and increased slow-wave sleep (N3%) are linked to elevated plasma NfL levels, indicating neuronal damage.
  • The combination of short sleep and nocturnal hypertension may pose a significant risk to brain health.
  • These findings highlight the critical role of sleep and blood pressure regulation in neurodegenerative disease pathways.