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Causal Relations between Exposome and Stroke: A Mendelian Randomization Study.

Hong-Qi Li1, Yi-Wei Feng1, Yu-Xiang Yang1

  • 1Department of Neurology and Institute of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, Shanghai, China.

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Summary
This summary is machine-generated.

This study identified key exposome factors causally linked to ischemic stroke. Higher blood pressure, atrial fibrillation, and diabetes increase stroke risk, while higher education is protective.

Keywords:
ExposomeMendelian randomization analysisStroke

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Area of Science:

  • Genetics and Genomics
  • Epidemiology
  • Public Health

Background:

  • The exposome encompasses environmental exposures influencing health.
  • Understanding exposome-stroke links is crucial for prevention.

Purpose of the Study:

  • To investigate causal relationships between exposome elements and ischemic stroke subtypes using omics data.
  • To identify novel targets for stroke prevention strategies.

Main Methods:

  • A Mendelian randomization study design was employed.
  • Utilized UK Biobank (361,194 subjects) for exposure data and MEGASTROKE consortium (52,000 participants) for outcome data.
  • Analyzed associations with any ischemic stroke (AIS) and its subtypes: large-artery atherosclerotic disease (LAD), cardioembolic stroke (CE), and small vessel disease (SVD).

Main Results:

  • Elevated blood pressure (systolic, diastolic, pulse pressure), atrial fibrillation, and diabetes were significantly associated with increased ischemic stroke risk.
  • Higher education demonstrated a protective effect, reducing stroke risk.
  • Specific causal links were identified for subtypes: BP, diabetes, and coronary artery disease for LAD; atrial fibrillation for CE; and BP and diabetes for SVD.

Conclusions:

  • The study confirms causal links between several exposome elements and ischemic stroke.
  • Identified both established risk factors and a novel protective factor (higher education) for stroke.
  • Findings provide evidence for targeted stroke prevention interventions.