Cited by 1,070Pharmacogenetics and Drug MetabolismGut microbiota and healthNutrition, Genetics, and Disease

The DOI matches its Crossref record; 33 of the 35 references it cites were found in a registry or an index.

Trimethylamine-N-Oxide, a Metabolite Associated with Atherosclerosis, Exhibits Complex Genetic and Dietary Regulation

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Abstract

Circulating trimethylamine-N-oxide (TMAO) levels are strongly associated with atherosclerosis. We now examine genetic, dietary, and hormonal factors regulating TMAO levels. We demonstrate that two flavin mono-oxygenase family members, FMO1 and FMO3, oxidize trimethylamine (TMA), derived from gut flora metabolism of choline, to TMAO. Further, we show that FMO3 exhibits 10-fold higher specific activity than FMO1. FMO3 overexpression in mice significantly increases plasma TMAO levels while silencing FMO3 decreases TMAO levels. In both humans and mice, hepatic FMO3 expression is reduced in males compared to females. In mice, this reduction in FMO3 expression is due primarily to downregulation by androgens. FMO3 expression is induced by dietary bile acids by a mechanism that involves the farnesoid X receptor (FXR), a bile acid-activated nuclear receptor. Analysis of natural genetic variation among inbred strains of mice indicates that FMO3 and TMAO are significantly correlated, and TMAO levels explain 11% of the variation in atherosclerosis.

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Metadata

Authors
Bennett, B. J., Vallim, T. Q. D. A., Wang, Z., Shih, D. M., Meng, Y., Gregory, J., Allayee, H., Lee, R., Graham, M., Crooke, R., Edwards, P. A., Hazen, S. L., & Lusis, A. J.
Affiliations
  • University of California, Los Angeles (US)
  • Cleveland Clinic (US)
  • University of Southern California (US)
Corresponding author
  • Bennett, Brian J.
  • Lusis, Aldons J.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2013-01
Volume
17
Issue
1
Pages
49-60
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2046971089
Cited by
1,070
References
35
Citations by year
2026: 75 · 2025: 88 · 2024: 88 · 2023: 95 · 2022: 116 · 2021: 102 · 2020: 107 · 2019: 90 · 2018: 81 · 2017: 50 · 2016: 67 · 2015: 59 · 2014: 32 · 2013: 19
FWCI
64.38
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • Cleveland Clinic
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL3 0568, HL28481, R01HL094322, P01HL030568, R00HL102223, K99HL102223, HL113452, P20HL113452, HL94322, K99/R00 HL102223, R01HL103866, HL103866, P01HL028481)
  • National Institute of General Medical Sciences (T32GM088088)
Topics
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Nutrition, Genetics, and Disease
Keywords
trimethylamine N-oxide, atherosclerosis, flavin monooxygenase 3, gut microbiota, choline metabolism, bile acids, farnesoid X receptor, androgen regulation, sex differences, genetic variation, dietary regulation
MeSH terms
Receptor, Farnesoid X-Activated, Androgens, Animals, Base Sequence, Bile Acids and Salts, Choline, Diet, Female, Humans, Male, Methylamines, Oxygenases, Sex Factors, Down-Regulation, Receptors, Cytoplasmic and Nuclear, Mice, Knockout, Polymorphism, Single Nucleotide, Gene Silencing, Atherosclerosis, Mice, HEK293 Cells

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