Elevated Blood Pressure: A Genetically Determined Risk Factor for Cerebral Artery Dissection

Area of Science:

• Cardiovascular Genetics
• Neurology

Background:

• Cerebral artery dissection (CAD) is a leading cause of stroke in young adults.
• The relationship between blood pressure (BP) and CAD risk requires further investigation.

Purpose of the Study:

• To investigate the potential causal link between blood pressure (BP) levels and cerebral artery dissection (CAD) risk.
• To provide genetic evidence for the association between BP and CAD.

Main Methods:

• A 2-sample Mendelian randomization (TSMR) framework was utilized.
• Large-scale genome-wide association studies data were analyzed using inverse variance weighted (IVW), MR-Egger regression, weighted median, and weighted mode methods.
• Pleiotropy and heterogeneity were assessed using MR-Egger intercept and Cochran's Q statistic.

Main Results:

• Elevated systolic BP (SBP) showed a significant association with increased CAD risk (IVW: OR = 3.09, P = 0.031).
• Increased diastolic BP (DBP) was also significantly associated with higher CAD risk (IVW: OR = 2.17, P = 0.023).
• Sensitivity analyses confirmed the robustness of the findings.

Conclusions:

• This TSMR study suggests a causal relationship between high SBP and DBP and an increased likelihood of CAD.
• The findings provide genetic support for the benefit of BP control in reducing CAD risk.