Can diet modulate trimethylamine N-oxide (TMAO) production? What do we know so far?

Salve Coutinho-Wolino, K., de F. Cardozo, L. F. M., de Oliveira Leal, V., Mafra, D. and Barcza Stockler-Pinto, M. (2021) Can diet modulate trimethylamine N-oxide (TMAO) production? What do we know so far? European Journal of Nutrition, 60(7), pp. 3567-3584. (doi: 10.1007/s00394-021-02491-6) (PMID:33533968)

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Abstract

Background: Trimethylamine N-oxide (TMAO) is a metabolite that has attracted attention due to its positive association with several chronic non-communicable diseases such as insulin resistance, atherosclerotic plaque formation, diabetes, cancer, heart failure, hypertension, chronic kidney disease, liver steatosis, cardiac fibrosis, endothelial injury, neural degeneration and Alzheimer's disease. TMAO production results from the fermentation by the gut microbiota of dietary nutrients such as choline and carnitine, which are transformed to trimethylamine (TMA) and converted into TMAO in the liver by flavin-containing monooxygenase 1 and 3 (FMO1 and FMO3). Considering that TMAO is involved in the development of many chronic diseases, strategies have been found to enhance a healthy gut microbiota. In this context, some studies have shown that nutrients and bioactive compounds from food can modulate the gut microbiota and possibly reduce TMAO production. Objective: This review has as main objective to discuss the studies that demonstrated the effects of food on the reduction of this harmful metabolite. Methods: All relevant articles until November 2020 were included. The articles were searched in Medline through PubMed. Results: Both the food is eaten acutely and chronically, by altering the nature of the gut microbiota, influencing colonic TMA production. Furthermore, hepatic production of TMAO by the flavin monooxygenases in the liver may also be influenced by phenolic compounds present in foods. Conclusion: The evidence presented in this review shows that TMAO levels can be reduced by some bioactive compounds. However, it is crucial to notice that there is significant variation among the studies. Further clinical studies should be conducted to evaluate these dietary components’ effectiveness, dose, and intervention time on TMAO levels and its precursors.

Item Type:Articles
Additional Information:This work was supported, in part, by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001 and Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) (Process E-26/203.269/2017).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Mafra, Prof Denise
Authors: Salve Coutinho-Wolino, K., de F. Cardozo, L. F. M., de Oliveira Leal, V., Mafra, D., and Barcza Stockler-Pinto, M.
College/School:College of Medical Veterinary and Life Sciences > School of Cancer Sciences
Journal Name:European Journal of Nutrition
Publisher:Springer
ISSN:1436-6207
ISSN (Online):1436-6215
Published Online:03 February 2021

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