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Type 2 Diabetes, Circulating Metabolites, and Calcific Aortic Valve Stenosis: A Mendelian Randomization Study
Rui Shen1,2,3, Chengliang Pan1,2,3, Guiwen Yi1,2,3
1Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
Metabolites
|July 26, 2024
Summary
Type 2 diabetes (T2D) causally increases calcific aortic valve stenosis (CAVS) risk, independent of obesity. Metabolites like branched-chain amino acids and blood pressure mediate this T2D-CAVS link, offering new intervention targets.
Area of Science:
- Cardiovascular Genetics
- Metabolic Diseases
- Epidemiology
Background:
- Type 2 Diabetes (T2D) is epidemiologically linked to Calcific Aortic Valve Stenosis (CAVS).
- The causal relationship and underlying mechanisms between T2D and CAVS remain incompletely understood.
- Obesity is a known risk factor for both T2D and cardiovascular diseases.
Purpose of the Study:
- To investigate the causal association between T2D and CAVS using Mendelian randomization (MR).
- To identify potential mediating pathways, including circulating metabolites and blood pressure, in the T2D-CAVS relationship.
- To assess if the T2D-CAVS association is independent of adiposity.
Main Methods:
- A two-sample, two-step Mendelian randomization (MR) analysis was performed.
- Genome-wide association study (GWAS) summary statistics were utilized.
- Inverse variance weighted (IVW) method and sensitivity analyses were employed for robustness.
Main Results:
- Genetically predicted T2D showed a significant causal association with increased CAVS risk (OR 1.153, p < 0.001).
- This association remained significant after adjusting for adiposity in multivariable MR.
- Sixty-nine mediators were identified, including branched-chain amino acids, valine, tyrosine, systolic blood pressure, triglycerides, fatty acids, and cholesterol, partially mediating the T2D-CAVS effect.
Conclusions:
- T2D causally increases CAVS risk, independent of adiposity.
- Circulating metabolites (e.g., branched-chain amino acids) and systolic blood pressure are significant mediators.
- These findings highlight potential therapeutic targets for preventing T2D-related CAVS.
