Metaorganismal nutrient metabolism as a basis of cardiovascular disease

Current Opinion in Lipidology
J Mark Brown, Stanley L Hazen

Abstract

Atherosclerosis and associated cardiovascular disease (CVD) remains the leading cause of mortality in Western societies. It is well accepted that the consumption of foods abundant in saturated fats and cholesterol, like meats, egg yolk and high-fat dairy products, are associated with increased CVD risk. New evidence suggests that trimethylamine (TMA)-containing nutrients within these foods, including phosphatidylcholine, choline, and L-carnitine, can enter into a microbial metabolic pathway that promotes CVD. In this review, we highlight the role of gut microbiota-driven nutrient metabolism as a novel pathway promoting CVD. Recent studies demonstrate a link between ingestion of dietary phosphatidylcholine, choline, and L-carnitine and CVD risk. At the center of this pathway is gut microbiota-dependent synthesis of a metabolic intermediate called TMA, and subsequent host-driven conversion of TMA to trimethylamine-N-oxide (TMAO). Microbiota-dependent generation of TMAO is associated with increased risk of incident major adverse cardiovascular events in humans, and provision of TMAO promotes atherosclerosis in mice. Microbial metabolism of TMA containing nutrients can lead to formation of the proatherogenic compound TMAO. Recent i...Continue Reading

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