AGT M235T genotype/anxiety interaction and gender in the HyperGEN study

Area of Science:

• Cardiovascular Genetics
• Behavioral Genetics
• Hypertension Research

Background:

• Anxiety and elevated heart rate (HR) are linked to hypertension development.
• The HyperGen cohort includes siblings with hypertension, controls, and offspring.
• Angiotensinogen AGT235T genotype was examined in relation to HR and anxiety levels.

Purpose of the Study:

• To investigate the association of the angiotensinogen AGT235T genotype with heart rate (HR) in relation to anxiety levels.
• To explore gene-environment interactions between AGT genotype and anxiety in hypertension risk.
• To understand potential reasons for inconsistent findings in genome-wide association studies.

Main Methods:

• Analysis of the HyperGen cohort (N=1,989) including men and women.
• Investigated the interaction of AGT genotype (TT, MT, MM) with anxiety.
• Adjusted for covariates: age, hypertension status, smoking, alcohol, medication, BMI, physical activity, and sedentary behavior.

Main Results:

• No main effect of AGT genotype on HR in men or women.
• In high anxious men, TT genotype was associated with high HR, and MM genotype with low HR.
• In women, HR was inversely associated with anxiety, with no genotype interaction.

Conclusions:

• High anxiety combined with the TT genotype may elevate hypertension risk in men.
• The MM genotype might offer protection against hypertension in high anxious men.
• Gene x environment interactions, like AGT genotype and anxiety, are crucial for understanding hypertension etiology and may explain replication issues in genetic studies.