Evidence map›Paper›PMID 42668089›Full record

ArticleCellular and molecular gastroenterology and hepatology2026

Trimethylamine N-Oxide, a Bariatric Surgery-Associated Host-Microbial Cometabolite, Reduces Colonic Tumorigenesis in a Sex-Dependent Manner.

Yang Bi, Maria Glymenaki, Maria A Valdivia-Garcia, Mu Wang, Kai Yee Eng, Edward Lin, Nana Gletsu-Miller, Julian R Marchesi, Ron Smits, Mona El-Bahrawy and 2 more

Abstract read
In one paragraph

Article in Cellular and molecular gastroenterology and hepatology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0cells of the map it votes in
0citing papers in PubMed
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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors.

Yang BiSection of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom.
Maria GlymenakiSection of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom; European Food Safety Authority, Parma, Italy.
Maria A Valdivia-GarciaSection of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom.
Mu WangSection of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom.
Kai Yee EngSection of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom.
Edward LinDepartment of Surgery, Emory University, Atlanta, Georgia.
Nana Gletsu-MillerDepartment of Applied Health Science, School of Public Health, Indiana University Bloomington, Bloomington, Indiana.
Julian R MarchesiSection of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom.
Ron SmitsDepartment of Gastroenterology and Hepatology, Erasmus MC Cancer Institute, University Medical Center Rotterdam, Rotterdam, The Netherlands.
Mona El-BahrawySection of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom.
Nadia GuerraFaculty of Natural Sciences, Department of Life Science, Imperial College London, London, United Kingdom.
Jia V LiSection of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom. Electronic address: jia.li@imperial.ac.uk.

Funding

Wellcome Trust
6 · The paper itself

Abstract

BACKGROUND &

aimsTrimethylamine N-oxide is a host-microbial cometabolite that significantly increases following Roux-en-Y gastric bypass. Although trimethylamine N-oxide is associated with cardiovascular diseases, its role in colorectal cancer remains unclear.

methodsFabplCre;Apc

resultsTrimethylamine N-oxide supplementation significantly reduced the colonic tumor load in male, but not female, mice. Consistently, dietary trimethylamine N-oxide resulted in higher retention of circulating trimethylamine N-oxide in males, which was significantly and inversely correlated with tumor loads. Furthermore, tumor necrosis factor-α-expressing cell frequencies in the colonic intraepithelial lymphocytes were significantly lower in trimethylamine N-oxide-supplemented male mice compared with controls, suggesting that circulating trimethylamine N-oxide could play a protective effect against colonic tumor growth via down-regulation of tumor necrosis factor-α-expressing cells. This was supported by in vitro observations that trimethylamine N-oxide reduced lipopolysaccharide-stimulated tumor necrosis factor-α production from macrophages. Trimethylamine N-oxide exerted no effects on cell proliferation (Ki67) and DNA damage (γH2AX) of HCT-116 cells.

conclusionsOur study leads us to conclude that higher retention of circulating trimethylamine N-oxide has a protective effect against colorectal cancer in a sex-dependent manner, highlighting the importance of understanding the complex relationship among the concentrations of host-microbial cometabolite trimethylamine N-oxide, its systemic circulation, and its biological function in modulating colorectal cancer risk.

Indexed as

Bacterial MetabolismColon Cancer RiskCytokinesDNA DamageInflammationMetabolismMicrobiotaWeight Loss Surgery

Identifiers

PMID42668089
PMCPMC13677037

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.