What does this research mean for the field?

In patients with inflammatory bowel disease, inflammation-associated alterations in tryptophan metabolism—specifically involving kynurenine and serotonin—are linked to altered AhR signaling and increased epithelial DNA damage. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To identify fecal water metabolites linked to DNA damage and aryl hydrocarbon receptor (AhR) activity and to examine whether shared metabolic pathways connect these processes in inflammatory bowel disease.

September 3, 2026MutagenesisOpen Access

Tryptophan metabolism and AhR activation are associated with fecal water-induced DNA damage in patients with inflammatory bowel disease

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Authors

LCLuping Chen SWShan Wang CSCorinne Spooren

Discussion

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Overview

Case-control study reveals tryptophan metabolism and AhR signaling modulate fecal water-induced DNA damage in inflammatory bowel disease, highlighting metabolic drivers of gut epithelial injury.

Key Points

To identify fecal water metabolites linked to DNA damage and aryl hydrocarbon receptor (AhR) activity and to examine whether shared metabolic pathways connect these processes in inflammatory bowel disease.
Analyzed fecal water samples from 80 patients with inflammatory bowel disease and 20 healthy controls.
Assessed DNA damage in Caco-2 cells via the comet assay, AhR activity via the EROD assay, and metabolite signatures via liquid chromatography-mass spectrometry.
Metabolomic pathway analysis identified overlapping metabolic routes between DNA damage and AhR activity, centering on tryptophan metabolites.
Kynurenine was inversely associated with AhR activity and positively associated with DNA damage in patients with inflammatory bowel disease.
Serotonin was positively associated with AhR activity and protected against fecal water-induced DNA damage, whereas indoles did not significantly contribute to DNA damage.

Cite This Study

Chen et al. (2026) studied this question.

synapsesocial.com/papers/6a9935e5636c6408cfa7e802 https://doi.org/10.1093/mutage/geag032

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September 3, 2026MutagenesisOpen Access

Tryptophan metabolism and AhR activation are associated with fecal water-induced DNA damage in patients with inflammatory bowel disease

View Full Paper

Ask AI

Bookmark

Authors

LCLuping Chen SWShan Wang CSCorinne Spooren

Discussion

Member takes

Overview

Case-control study reveals tryptophan metabolism and AhR signaling modulate fecal water-induced DNA damage in inflammatory bowel disease, highlighting metabolic drivers of gut epithelial injury.

Key Points

To identify fecal water metabolites linked to DNA damage and aryl hydrocarbon receptor (AhR) activity and to examine whether shared metabolic pathways connect these processes in inflammatory bowel disease.
Analyzed fecal water samples from 80 patients with inflammatory bowel disease and 20 healthy controls.
Assessed DNA damage in Caco-2 cells via the comet assay, AhR activity via the EROD assay, and metabolite signatures via liquid chromatography-mass spectrometry.
Metabolomic pathway analysis identified overlapping metabolic routes between DNA damage and AhR activity, centering on tryptophan metabolites.
Kynurenine was inversely associated with AhR activity and positively associated with DNA damage in patients with inflammatory bowel disease.
Serotonin was positively associated with AhR activity and protected against fecal water-induced DNA damage, whereas indoles did not significantly contribute to DNA damage.

Cite This Study

Chen et al. (2026) studied this question.

synapsesocial.com/papers/6a9935e5636c6408cfa7e802 https://doi.org/10.1093/mutage/geag032

View Full Paper

Ask AI

Bookmark