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The complex metabolism of trimethylamine in humans: endogenous and exogenous sources

  • Jyoti Chhibber-Goel (a1), Anamika Gaur (a1), Varsha Singhal (a1), Neeraj Parakh (a2), Balram Bhargava (a2) and Amit Sharma (a1)...
  • Please note a correction has been issued for this article.

Abstract

Trimethylamine (TMA) is a tertiary amine with a characteristic fishy odour. It is synthesised from dietary constituents, including choline, L-carnitine, betaine and lecithin by the action of microbial enzymes during both healthy and diseased conditions in humans. Trimethylaminuria (TMAU) is a disease typified by its association with the characteristic fishy odour because of decreased TMA metabolism and excessive TMA excretion. Besides TMAU, a number of other diseases are associated with abnormal levels of TMA, including renal disorders, cancer, obesity, diabetes, cardiovascular diseases and neuropsychiatric disorders. Aside from its role in pathobiology, TMA is a precursor of trimethylamine-N-oxide that has been associated with an increased risk of athero-thrombogenesis. Additionally, TMA is a major air pollutant originating from vehicular exhaust, food waste and animal husbandry industry. The adverse effects of TMA need to be monitored given its ubiquitous presence in air and easy absorption through human skin. In this review, we highlight multifaceted attributes of TMA with an emphasis on its physiological, pathological and environmental impacts. We propose a clinical surveillance of human TMA levels that can fully assess its role as a potential marker of microbial dysbiosis-based diseases.

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Corresponding author

*Corresponding author: Amit Sharma, Group Leader, Molecular Medicine Group, International Centre for Genetic Engineering and Biotechnology, New Delhi 110067, India. E-mail: amit.icgeb@gmail.com

References

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The complex metabolism of trimethylamine in humans: endogenous and exogenous sources

  • Jyoti Chhibber-Goel (a1), Anamika Gaur (a1), Varsha Singhal (a1), Neeraj Parakh (a2), Balram Bhargava (a2) and Amit Sharma (a1)...
  • Please note a correction has been issued for this article.

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