Genetically modulated educational attainment and coronary disease risk

Area of Science:

• Genetics
• Epidemiology
• Public Health

Background:

• Genetic predisposition and lifestyle factors independently influence disease risk.
• Educational attainment is a key indicator of socioeconomic status and lifestyle.
• Understanding the interplay between genetics, education, and disease is crucial for public health strategies.

Purpose of the Study:

• To investigate the relationship between genetic predisposition for educational attainment and coronary artery disease (CAD) risk.
• To explore the role of lifestyle factors, such as smoking, BMI, and hypertension, as mediators in this relationship.

Main Methods:

• Calculation of a 'genetic education score' based on 74 genetic variants associated with educational attainment.
• Analysis of the association between the 'genetic education score' and CAD risk in a large case-control cohort and UK Biobank.
• Mendelian randomization analyses to infer causality and assess the mediating roles of smoking, BMI, and hypertension.

Main Results:

• A higher 'genetic education score' was inversely correlated with CAD risk (OR 0.79, P=1.52×10⁻⁸).
• The 'genetic education score' was strongly associated with lower smoking rates, lower BMI, and reduced hypertension risk.
• The association between the 'genetic education score' and CAD risk was abolished when adjusting for BMI and smoking, indicating their mediating role.

Conclusions:

• Genetic variants influencing educational attainment are associated with a reduced risk of CAD.
• Lifestyle factors, particularly smoking and BMI, mediate the protective effect of genetic predisposition for education on CAD.
• These findings highlight the complex interplay between genetics, lifestyle, and cardiovascular health.