Intestinal Microbial Metabolism of Phosphatidylcholine and Cardiovascular Risk
W.H. Wilson Tang,Zeneng Wang,Bruce S. Levison,Robert A. Koeth,Earl B. Britt,Xiaoming Fu,Yuping Wu,Stanley L. Hazen +7 more
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TLDR
The production of TMAO from dietary phosphatidylcholine is dependent on metabolism by the intestinal microbiota and increased levels are associated with an increased risk of incident major adverse cardiovascular events.Abstract:
Background Recent studies in animals have shown a mechanistic link between intestinal microbial metabolism of the choline moiety in dietary phosphatidylcholine (lecithin) and coronary artery disease through the production of a proatherosclerotic metabolite, trimethylamine-N-oxide (TMAO). We investigated the relationship among intestinal microbiota-dependent metabolism of dietary phosphatidylcholine, TMAO levels, and adverse cardiovascular events in humans. Methods We quantified plasma and urinary levels of TMAO and plasma choline and betaine levels by means of liquid chromatography and online tandem mass spectrometry after a phosphatidylcholine challenge (ingestion of two hard-boiled eggs and deuterium [d9]-labeled phosphatidylcholine) in healthy participants before and after the suppression of intestinal microbiota with oral broad-spectrum antibiotics. We further examined the relationship between fasting plasma levels of TMAO and incident major adverse cardiovascular events (death, myocardial infarction,...read more
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