Title:Pathogenic Mechanisms of Trimethylamine N-Oxide-induced Atherosclerosis and Cardiomyopathy
Volume: 20
Issue: 1
Author(s): Youjing Zheng and Jia-Qiang He*
Affiliation:
- Department of Biomedical Sciences and Pathobiology, College of Veterinary Medicine, Virginia Tech, Blacksburg,
VA24061, USA
Keywords:
Metabolites, trimethylamine N-oxide, atherosclerosis, cardiomyopathy, cardiomyocytes, signalling pathway, mechanism.
Abstract: Trimethylamine N-oxide (TMAO) is a gut microbiota metabolite derived from trimethylamine-
containing nutrient precursors such as choline, L-carnitine, and betaine, which are rich in
many vegetables, fruits, nuts, dairy products, and meats. An increasing number of clinical studies
have demonstrated a strong relationship between elevated plasma TMAO levels and adverse cardiovascular
events. It is commonly agreed that TMAO acts as an independent risk factor and a prognostic
index for patients with cardiovascular disease. Although most animal (mainly rodent) data
support the clinical findings, the mechanisms by which TMAO modulates the cardiovascular system
are still not well understood. In this context, we provide an overview of the potential mechanisms
underlying TMAO-induced cardiovascular diseases at the cellular and molecular levels,
with a focus on atherosclerosis. We also address the direct effects of TMAO on cardiomyocytes (a
new and under-researched area) and finally propose TMAO as a potential biomarker and/or therapeutic
target for diagnosis and treatment of patients with cardiovascular disease.