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Gastrointestinal (GI) diagnostic studies are pivotal in confirming, ruling out, diagnosing, or staging various diseases, including cancers. Following diagnosis, allocating time for discussions with the patient and providing informational resources is crucial. Diagnostic assessments of the GI tract often occur in outpatient settings like endoscopy suites or GI labs. Preparation for these tests may include dietary restrictions, fasting, liquid bowel preparations, laxatives, enemas, and the...
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Related Experiment Video

Updated: Jul 6, 2025

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Tryptophan Metabolites And Their Predicted Microbial Sources In Fecal Samples From Healthy Individuals.

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    This summary is machine-generated.

    This study quantifies gut tryptophan metabolites (TMs) and identifies their bacterial sources in healthy adults. Findings reveal a complex microbial network regulating TMs, crucial for gut homeostasis.

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    Area of Science:

    • Microbiology
    • Metabolomics
    • Human Health

    Background:

    • Gut microbiota produce tryptophan metabolites (TMs) vital for maintaining homeostasis.
    • Accurate measurement of fecal TMs and identification of their microbial origins remain challenging.

    Approach:

    • Quantified eight indole pathway TMs in fecal samples from 21 healthy adults.
    • Utilized 16S and whole genome shotgun (WGS) sequencing to link TM levels with bacterial abundance.
    • Identified 151 genera and 592 bacterial species, predicting microbial sources of TM production.

    Key Points:

    • Reported fecal concentrations for indole-3-lactate, indole-3-propionate, and 3-indoleacrylate in healthy individuals.
    • Indole, indole-3-acetate (IAA), and skatole constituted 86% of measured TMs.
    • Found significant correlations between seven TMs and 29 bacterial species, highlighting a complex TM production network.

    Conclusions:

    • Data suggest a key role for Collinsella aerofaciens and IAA in maintaining intestinal homeostasis.
    • Enhanced understanding of TM-microbe relationships in the healthy gut.
    • Potential for novel therapeutic strategies targeting tryptophan metabolism for gut health restoration.