Trimethylamine-N-Oxide and Related Metabolites: Assessing Cardiovascular Risk in the Dallas Heart Study

Area of Science:

• Cardiovascular Medicine
• Metabolomics
• Epidemiology

Background:

• Trimethylamine N-oxide (TMAO) is a metabolite linked to cardiovascular health.
• Understanding the association between TMAO and cardiovascular events is crucial for primary prevention.

Purpose of the Study:

• To evaluate the association between TMAO and related metabolites with adverse cardiovascular events.
• To assess the role of these metabolites in a multiethnic urban primary prevention population.

Main Methods:

• A case-control study was conducted using data from the Dallas Heart Study (361 participants).
• Plasma levels of TMAO, choline, carnitine, betaine, and butyrobetaine were measured.
• Conditional logistic regression was used to compare odds of incident atherosclerotic cardiovascular disease (ASCVD).

Main Results:

• Participants with incident ASCVD had significantly higher levels of TMAO and related metabolites.
• Higher plasma TMAO concentrations (quartile 4 vs. quartile 1) were associated with a >2-fold increased odds of ASCVD.
• Similar positive associations were observed for choline, betaine, carnitine, and butyrobetaine.

Conclusions:

• TMAO and related metabolites are independently associated with ASCVD events.
• Measurement of TMAO and related metabolites may assist in ASCVD risk stratification for primary prevention.
• Further research is warranted to confirm these findings and clinical utility.