ArticleiScience2024
Impaired tryptophan metabolism by type 2 inflammation in epithelium worsening asthma.
Article in iScience, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
What it found
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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
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Who cites it
10 citing papers in PubMed.
- Nexus of IDO1/Kynurenine Pathway to T-Cell Exhaustion: Hypoxia-Induced Tryptophan Metabolism in Glioblastoma.Metabolites · 2026Review
- Regulation of allergies across the body by microbial metabolites.Experimental & molecular medicine · 2026Review
- The Role of Aryl Hydrocarbon Receptor in Airway Remodeling: Mechanistic Insights Across Cellular Functions.Clinical reviews in allergy & immunology · 2026Review
- The ratio of circulatory levels of sphingolipids to steroids predicts asthma exacerbations.Nature communications · 2026Article
- Exploratory investigation of changes in blood transcriptome following mepolizumab treatment for asthma.Frontiers in immunology · 2026Article
- Gut microbiota in asthma: mechanisms, clinical evidence, and therapeutic opportunities.Frontiers in cellular and infection microbiology · 2026Review
- From gut microbiota dysbiosis to immune dysregulation: pathogenic mechanisms and emerging therapeutic perspectives in pediatric asthma.Frontiers in immunology · 2026Review
- Mechanisms by which complex carbohydrates influence immune imbalance in COPD via the gut-lung axis: from colonic fermentation to pulmonary immune responses.Frontiers in nutrition · 2026Review
- Microbiota-Driven Immune Dysregulation Along the Gut-Lung-Vascular Axis in Asthma and Atherosclerosis.Biomedicines · 2025Review
- The gut-lung axis in asthma: microbiota-driven mechanisms and therapeutic perspectives.Frontiers in microbiology · 2025Review
Corrections and comments
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Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Previous researches indicate that tryptophan metabolism is critical to allergic inflammation and that indoleamine 2,3-dioxygenase 1 (IDO1), as a key enzyme, is known for its immunosuppressive properties. Therefore, we are aimed to explore whether tryptophan metabolism, especially IDO1, influences allergic asthma and clarify specific mechanism. With the analysis of clinical data, exploration in cell experiments, and verifying in HDM-induced asthma mice models, we finally found that in allergic asthma, low level of T1 cytokines along with high level of T2 cytokines inhibited the expression of IDO1 in airway epithelium, hampering the kynurenine pathway in tryptophan metabolism and decreasing the level of intracellular kynurenine (Kyn). As an endogenous ligand of aryl hydrocarbon receptor, Kyn regulated the expression of cystathionine-γ-lyase (CTH). Notably, in asthma models, enhancing either IDO1 or H
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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.