Genetic causal assessment between major depression and hypertension: A two-sample bidirectional Mendelian...

Area of Science:

• Genetics
• Cardiovascular Health
• Mental Health

Background:

• Major depression and hypertension frequently coexist, posing a significant clinical challenge.
• Understanding the potential causal links between these conditions is crucial for effective management.

Purpose of the Study:

• To investigate the potential genetic causal relationship between major depression and hypertension using a bidirectional Mendelian randomization approach.

Main Methods:

• Genome-wide association studies (GWAS) summary data for major depression and hypertension were utilized.
• A two-sample bidirectional Mendelian randomization (MR) study was performed on European ancestry populations.
• Sensitivity analyses were conducted to ensure the robustness of the findings, including assessments for heterogeneity, horizontal pleiotropy, and outliers.

Main Results:

• A significant positive genetic causal association was found between major depression and hypertension (OR = 1.160, P = 0.016).
• No significant genetic causal relationship was detected from hypertension to major depression (OR = 1.004, P = 0.670).
• The MR analysis confirmed the absence of heterogeneity, horizontal pleiotropy, and outliers.

Conclusions:

• Major depression acts as a genetic risk factor for hypertension in European ancestry populations.
• Clinical monitoring for hypertension is recommended in patients with depression.
• Findings should be cautiously applied to non-European populations.