ArticleProceedings of the National Academy of Sciences of the United States of America2017
Ornithine decarboxylase regulates M1 macrophage activation and mucosal inflammation via histone modifications.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05042024 (Supplementation With L-ornithine Increases Representation Density of CD68+ and CD163+ Macrophages in Human Periodontitis Gingiva and Can Modulate Macrophages Phenotypes. Randomized Controlled Pilot Trial), which is not on this map. Cited by 149 papers, 1 of them a synthesis that pooled it.
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
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.
Supplementation With L-ornithine Increases Representation Density of CD68+ and CD163+ Macrophages in Human Periodontitis Gingiva and Can Modulate Macrophages Phenotypes. Randomized Controlled Pilot Trial
Who cites it
149 citing papers in PubMed, 1 synthesis or guideline pooled it, 218 citations in OpenAlex.
- The Role of the Gut Microbiome in Clinical Outcomes of Colorectal Cancer: A Systematic Review (2020-2025).Oncology research · 2026Pooled it
- Monocyte transcriptomic profile following EPA and DHA supplementation in men and women with low-grade chronic inflammation.Atherosclerosis · 2024Trial
- Inhibition of polyamine biosynthesis preserves β cell function in type 1 diabetes.Cell reports. Medicine · 2023Trial
- Procalcitonin metabolomics in the critically ill reveal relationships between inflammation intensity and energy utilization pathways.Scientific reports · 2021Trial
- Regulation of Inducible Nitric Oxide Synthase (NOS2) Expression in Healthy and Inflamed Bowel: A Narrative Review.International journal of molecular sciences · 2026Review
- IL-9R/Arg1 pathway promotes polyamine metabolism in human airway macrophages.The Journal of allergy and clinical immunology · 2026Article
- Coupled Enzyme Assay for Measuring Ornithine Decarboxylase Activity in Cell Lysates Using a Liquid-Stable COBio-protocol · 2026Article
- Immunosenescence in systemic and multi-organ aging: mechanisms, inter-organ crosstalk, and translational opportunities.npj aging · 2026Review
- Dynamic remodeling of amino acid metabolism in tumor-associated macrophages: Fueling immunosuppression, reshaping tumor niches, and unlocking metabolic checkpoints.Journal of advanced research · 2026Review
- miR-9394b from Lactobacillus paracasei extracellular vesicles targets iNOS to reprogram host NO-ornithine metabolism and ameliorate DSS-induced murine colitis.NPJ biofilms and microbiomes · 2026Article
- GATA2 controls alveolar macrophage inflammatory gene expression and metabolic function.JCI insight · 2026Article
- The remarkable legacy of the K6/ODC mouse: mechanisms of polyamine-promoted tumorigenesis revealed.Amino acids · 2026Review
- ODC1 restricts meningeal B cell age-associated-like phenotype and function in multiple sclerosis: A human and experimental study.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Macrophage-intrinsic and IL-9-dependent arginine metabolism promotes lung tumor growth.Journal of immunology (Baltimore, Md. : 1950) · 2026Article
- Androgen Receptor Drives Polyamine Synthesis, Creating a Vulnerability for Prostate Cancer.Cancer research · 2026Article
- Deciphering the MYCN-driven metabolic microenvironment of neuroblastoma.Trends in molecular medicine · 2026Review
- Understanding the Mechanistic Connection between Dysbiosis and Polyamine Regulation in Oral and Intestinal Inflammation- Role of Tregs and Th17 Cells.Journal of cellular immunology · 2026Article
- Ammonia metabolic reprogramming in the tumor microenvironment: emergence of an immunosuppressive niche.Frontiers in cell and developmental biology · 2026Review
- Article
- Metabolic syndrome promotes endometrial cancer by Oleic acid-mediated polyamine accumulation.Nature communications · 2025Article
89 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
12 authors at 4 institutions in 1 country.
Funding
Abstract
Macrophage activation is a critical step in host responses during bacterial infections. Ornithine decarboxylase (ODC), the rate-limiting enzyme in polyamine metabolism, has been well studied in epithelial cells and is known to have essential roles in many different cellular functions. However, its role in regulating macrophage function during bacterial infections is not well characterized. We demonstrate that macrophage-derived ODC is a critical regulator of M1 macrophage activation during both Helicobacter pylori and Citrobacter rodentium infection. Myeloid-specific Odc deletion significantly increased gastric and colonic inflammation, respectively, and enhanced M1 activation. Add-back of putrescine, the product of ODC, reversed the increased macrophage activation, indicating that ODC and putrescine are regulators of macrophage function. Odc-deficient macrophages had increased histone 3, lysine 4 (H3K4) monomethylation, and H3K9 acetylation, accompanied by decreased H3K9 di/trimethylation both in vivo and ex vivo in primary macrophages. These alterations in chromatin structure directly resulted in up-regulated gene transcription, especially M1 gene expression. Thus, ODC in macrophages tempers antimicrobial, M1 macrophage responses during bacterial infections through histone modifications and altered euchromatin formation, leading to the persistence and pathogenesis of these organisms.
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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.