ArticleInternational journal of molecular sciences2020
Anti-Inflammatory and Anti-Oxidative Activity of Indole-3-Acetic Acid Involves Induction of HO-1 and Neutralization of Free Radicals in RAW264.7 Cells.
Article in International journal of molecular sciences, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers.
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Who cites it
58 citing papers in PubMed, 106 citations in OpenAlex.
- Daily Vinegar Ingestion Improves Depression Scores and Alters the Metabolome in Healthy Adults: A Randomized Controlled Trial.Nutrients · 2021Trial
- Indole-3-acetic acid production is rare among gut bacteria and reflects OFOR-driven amino acid oxidation in acetogens.Gut microbes · 2026Article
- Microbiome-Derived Tryptophan Metabolites Regulate AhR Signaling to Restore Epithelial Barrier Integrity in Inflammatory Bowel Disease.MicrobiologyOpen · 2026Review
- Oxindole Compounds Induce NRF2-ARE Antioxidant Pathway in MCF7 Cells and Reduce Inflammatory Response in RAW264.7 Cells.Molecules (Basel, Switzerland) · 2026Article
- Plant-derived indole alkaloids in chronic inflammatory diseases: molecular mechanisms, therapeutic potential and translational challenges.Inflammopharmacology · 2026Review
- A mouse model to study persistent fatigue.Research square · 2026Article
- Antibiotic Exposure Through Human Milk Influences the Infant Gut Microbiome.bioRxiv : the preprint server for biology · 2026Article
- Tryptophan-Derived Microbial Metabolite Indole-3-Acetic Acid Ameliorates Periodontitis Through AhR/CYP1A1-Mediated Macrophage Polarisation.Journal of clinical periodontology · 2026Article
- Towards microbiome-informed strategies for predicting and preventing pregnancy complications.Reproduction & fertility · 2026Review
- Proline/serine-rich coiled-coil 1 alleviates atherosclerosis via remodeling tryptophan metabolism mediated by Akkermansia muciniphila.Experimental & molecular medicine · 2026Article
- Integrated Untargeted and Targeted Metabolomics Reveals Distinct Bioactive Metabolite Profiles Between Probiotic Supplements and Yogurt.International journal of molecular sciences · 2026Article
- Cross-kingdom microbial interactions in the gut during inflammatory bowel disease.Journal of translational medicine · 2026Review
- Indole-3-acetic acid production is rare among gut bacteria and reflects OFOR-driven amino acid oxidation in acetogens.bioRxiv : the preprint server for biology · 2026Article
- The microbiota-metabolite-immune axis in the olfactory cleft microenvironment: mechanisms and therapeutic implications for dysbiosis-driven olfactory dysfunction in chronic rhinosinusitis.Frontiers in immunology · 2026Review
- Therapeutic potential of nutritional aryl hydrocarbon receptor ligands for respiratory syncytial virus infection: a mini review.Frontiers in microbiology · 2026Review
- Causality of blood metabolites and narcolepsy type 1: A Mendelian randomization study.Medicine · 2025Article
- Interactions between the gut microbiota and immune cell dynamics: novel insights into the gut-bone axis.Gut microbes · 2025Review
- Leveraging microbiota-metabolites to reduce inflammation and promote functional recovery following spinal cord injury in female mice.Brain, behavior, & immunity - health · 2025Article
- The Gut Microbial Metabolite Indole-3-Acetic Acid Reprograms Systemic Homeostasis and Ameliorates IBD-Associated Cachexia Independent of Food Intake.International journal of molecular sciences · 2025Article
- Effect of Tryptophan Supplementation Levels on the Cecal Microbial Composition, Growth Performance, Immune Function and Antioxidant Capacity in Broilers.Metabolites · 2025Article
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
Abstract
The cellular and molecular mechanisms by which indole-3-acetic acid (IAA), a tryptophan-derived metabolite from gut microbiota, attenuates inflammation and oxidative stress has not been fully elucidated. The present study was to unearth the protective effect and underlying mechanism of IAA against lipopolysaccharide (LPS)-induced inflammatory response and free radical generation in RAW264.7 macrophages. IAA significantly ameliorated LPS-induced expression of interleukin-1β (IL-1β), interleukin-6 (IL-6), and monocyte chemoattractant protein-1 (MCP-1) as well as generation of reactive oxidative species (ROS) and nitric oxide (NO). LPS-triggered nuclear translocation of nuclear factor kappa B (NF-κB) p65 was mitigated by IAA treatment. Further, an up-regulation of heme oxygenase-1 (HO-1) was observed in IAA-treated cells in dose-dependent manner under both normal and LPS-stimulated condition. Interference of HO-1 activity by tin protoporphyrin IX (SnPP) impeded the alleviative effects of IAA on expression of IL-1β and IL-6 induced by LPS, whereas demonstrated no effect on its suppression of ROS and NO production. This result suggests a HO-1-dependent anti-inflammatory effect of IAA and its direct scavenging action on free radicals. Treatment with CH-223191, a specific antagonist of aryl hydrocarbon receptor (AhR), showed no significant effects on the beneficial role of IAA against inflammation and free radical generation. In summary, our findings indicate that IAA alleviates LPS-elicited inflammatory response and free radical generation in RAW264.7 macrophages by induction of HO-1 and direct neutralization of free radicals, a mechanism independent of AhR.
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