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Summary
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Elevated blood pressure (BP) before age 40 showed little impact on midlife brain health or cognition. However, childhood BP exposure was linked to adverse changes in retinal arteriolar calibers, suggesting early small vessel remodeling.

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Area of Science:

  • Neuroscience
  • Cardiovascular Health
  • Aging Research

Background:

  • Elevated blood pressure (BP) in midlife is a known risk factor for cognitive decline in later life.
  • This study investigated if early-life BP exposure impacts brain health and cognition by midlife.

Purpose of the Study:

  • To examine the association between cumulative blood pressure exposure from childhood and brain health and cognitive ability in midlife.
  • To determine if early-life blood pressure predicts brain aging markers and cognitive function at age 45.

Main Methods:

  • Utilized data from the Dunedin Multidisciplinary Health and Development Study (n=893).
  • Measured systolic (SBP) and diastolic (DBP) blood pressure from childhood (age 7) through midlife (age 45).
  • Assessed brain health (BrainAge, white matter hyperintensity burden, retinal arteriolar calibers) and cognitive ability (IQ) at age 45.

Main Results:

  • Limited evidence linked BP before age 40 to midlife brain health or cognitive ability.
  • Midlife BP (from ~age 40) associated with increased BrainAge and white matter hyperintensity burden.
  • Childhood BP exposure correlated with reduced retinal arteriolar calibers, indicating cerebral small vessel remodeling, with effects intensifying by midlife.

Conclusions:

  • BP exposure prior to age 40 showed minimal association with midlife brain aging markers or cognitive function.
  • Cumulative BP exposure from childhood is linked to adverse cerebral small vessel remodeling, evidenced by reduced retinal arteriolar calibers.
  • Findings suggest early-life BP may influence cerebrovascular health from childhood onwards.