ArticleGut microbes2019
Circulating levels of the anti-oxidant indoleproprionic acid are associated with higher gut microbiome diversity.
Article in Gut microbes, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 75 papers, 2 of them syntheses that pooled 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.
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.
Who cites it
75 citing papers in PubMed, 2 syntheses or guidelines pooled it, 114 citations in OpenAlex.
- The Mechanism Underlying the Influence of Indole-3-Propionic Acid: A Relevance to Metabolic Disorders.Frontiers in endocrinology · 2022Pooled it
- Mediterranean Diet to Prevent the Development of Colon Diseases: A Meta-Analysis of Gut Microbiota Studies.Nutrients · 2021Pooled it
- A Polyphenol-Rich Diet Increases the Gut Microbiota Metabolite Indole 3-Propionic Acid in Older Adults with Preserved Kidney Function.Molecular nutrition & food research · 2022Trial
- Article
- Gut microbiota-derived metabolites as potential therapeutic agents for intervertebral disc degeneration: insights from network pharmacology and molecular docking.Gut pathogens · 2026Article
- Microbiota-Derived Metabolites in Developmental Programming: Bridging Early-Life Gut Microbiota to Childhood Metabolic Disorders.Current medical science · 2026Review
- Microbiota-derived metabolites and cardiovascular implications in Inflammatory Bowel Disease (IBD).Molecular medicine (Cambridge, Mass.) · 2026Review
- Engineered Clostridium butyricum-pMTL007-GLP-1 Delays Neurodegeneration in Prnp-SNCA*A53T Transgenic Mice Model by Suppressing Astrocyte Senescence.Probiotics and antimicrobial proteins · 2026Article
- Clostridium leptum attenuates allergic airway inflammation via tDC‒Treg axis activation in a murine model of gut dysbiosis-associated asthma.Scientific reports · 2025Article
- Intestinal-related substances in obesity regulation: A comprehensive review.World journal of gastrointestinal pharmacology and therapeutics · 2025Review
- Novel cross-feeding human gut microbes metabolizing tryptophan to indole-3-propionate.Gut microbes · 2025Article
- Microbiota-Derived Tryptophan Metabolite Indole-3-Propionic Acid-Emerging Role in Neuroprotection.Molecules (Basel, Switzerland) · 2025Review
- Indole Propionic Acid Regulates Gut Immunity: Mechanisms of Metabolite-Driven Immunomodulation and Barrier Integrity.Journal of microbiology and biotechnology · 2025Review
- Associations Between Serum Gut-Derived Tryptophan Metabolites and Cardiovascular Health Markers in Adolescents with Obesity.Nutrients · 2025Article
- Cellular and Molecular Mechanisms Explaining the Link Between Inflammatory Bowel Disease and Heart Failure.Cells · 2025Review
- Emerging probiotics: future therapeutics for human gut health.FEMS microbiology ecology · 2025Article
- Metabolomic Alterations in Patients with Obesity and the Impact of Metabolic Bariatric Surgery: Insights for Future Research.Metabolites · 2025Review
- Shaping the human gut microbiota: The role of canine companionship, lifestyle choices, andOne health (Amsterdam, Netherlands) · 2025Article
- Gut-Heart Axis: The Role of Gut Microbiota and Metabolites in Heart Failure.Circulation research · 2025Review
- Article
15 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 3 institutions in 3 countries.
Funding
Abstract
The gut microbiome has recently emerged as an important regulator of insulin resistance and abdominal obesity. The tryptophan metabolite generated by the gut microbiome, indoleproprionic acid (IPA) has been shown to predict the onset of type 2 diabetes. IPA is a metabolite produced by gut microbes from dietary tryptophan that exhibits a high degree of inter-individual variation. The microbiome composition parameters that are associated with circulating levels of this potent anti-oxidant have however not been investigated to date in human populations. In 1018 middle-aged women from the TwinsUK cohort, we assessed the relationship between serum IPA levels and gut microbiome composition targeting the 16S rRNA gene. Microbiome alpha-diversity was positively correlated with serum indoleproprionic acid levels (Shannon Diversity: Beta[95%CI] = 0.19[0.13;0.25], P = 6.41 × 10
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What OpenQuestion holds
Registered trials
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.