ReviewFrontiers in immunology2020
IDO Expression in Cancer: Different Compartment, Different Functionality?
Review in Frontiers in immunology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 138 papers, 3 of them syntheses 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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
138 citing papers in PubMed, 3 syntheses or guidelines pooled it, 207 citations in OpenAlex.
- Predicting Immunotherapy Efficacy with Machine Learning in Gastrointestinal Cancers: A Systematic Review and Meta-Analysis.International journal of molecular sciences · 2025Pooled it
- Macrophages and the immune microenvironment in OPMDs: a systematic review of the literature.Frontiers in oral health · 2025Pooled it
- The immunotherapeutic role of indoleamine 2,3-dioxygenase in head and neck squamous cell carcinoma: A systematic review.Clinical otolaryngology : official journal of ENT-UK ; official journal of Netherlands Society for Oto-Rhino-Laryngology & Cervico-Facial Surgery · 2021Pooled it
- Integrative Immune Signature of Complementary Circulating and Tumoral Biomarkers Maximizes the Predictive Power of Adjuvant Immunotherapeutic Benefits in High-risk Melanoma.Clinical cancer research : an official journal of the American Association for Cancer Research · 2025Trial
- Immune evasion in locally advanced mismatch repair-deficient microsatellite instability-high colorectal cancer: Reduced T-cell infiltration and upregulation of epithelial IDO1 expression.Oncoimmunology · 2026Article
- IDO1 regulating ROS rhythm reveals glycogenolysis/PPP as a cancer treatment target.Nature chemical biology · 2026Article
- Advances in Immunotherapy for Intrahepatic Cholangiocarcinoma.International journal of molecular sciences · 2026Review
- The Next Wave of Immunotherapy: A Critical Review of Nanotechnology Strategies for Immune Checkpoint Blockade.Pharmaceutics · 2026Review
- Article
- Quantitative analysis of myeloid cell patterns and immunosuppressive enzyme (IDO, ARG1) expression in colorectal cancer pulmonary metastases and corresponding primary tumours.Scientific reports · 2026Article
- PROTAC-based protein degradation: a window of opportunity for melanoma therapy.Journal of biomedical science · 2026Review
- Characterization, Preconditioning, Safety, and Other Issues of MSC-Derived EVs and Secretome.International journal of molecular sciences · 2026Review
- Modulation of the Kynurenine Pathway: A New Approach for Treating Neurodegeneration.Life (Basel, Switzerland) · 2026Review
- IDO family: the metabolic crossroads connecting immunity, nerves and tumors.Journal of translational medicine · 2026Review
- Nanomedicine Targeting Cancer-Associated Fibroblasts in Prostate Cancer: From Biological Mechanisms to Integrated Theranostic Strategies.International journal of nanomedicine · 2026Review
- Spatially resolved tryptophan-kynurenine niches in HNSCC: immunometabolic microdomains and therapeutic implications.Frontiers in immunology · 2026Review
- The kynurenine pathway in depression and schizophrenia: convergent signals, divergent states, and clinical signatures.EXCLI journal · 2026Review
- Immune Landscape and Application of Immune Checkpoint Inhibitors in Clear Cell Renal Cell Carcinoma.International journal of molecular sciences · 2025Review
- Harnessing IDO inhibitors to optimize cancer immunotherapy.Naunyn-Schmiedeberg's archives of pharmacology · 2025Review
- Serum Kynurenine Pathway Metabolites as Candidate Diagnostic Biomarkers for Pituitary Adenoma: A Case-Control Study.Medicina (Kaunas, Lithuania) · 2025Article
78 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
3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Indoleamine 2,3-dioxygenase 1 (IDO1) is a cytosolic haem-containing enzyme involved in the degradation of tryptophan to kynurenine. Although initially thought to be solely implicated in the modulation of innate immune responses during infection, subsequent discoveries demonstrated IDO1 as a mechanism of acquired immune tolerance. In cancer, IDO1 expression/activity has been observed in tumor cells as well as in the tumor-surrounding stroma, which is composed of endothelial cells, immune cells, fibroblasts, and mesenchymal cells. IDO1 expression/activity has also been reported in the peripheral blood. This manuscript reviews available data on IDO1 expression, mechanisms of its induction, and its function in cancer for each of these compartments. In-depth study of the biological function of IDO1 according to the expressing (tumor) cell can help to understand if and when IDO1 inhibition can play a role in cancer therapy.
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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.