ReviewJournal of hematology & oncology2021
Indoleamine 2,3-dioxygenase 1 (IDO1) inhibitors in clinical trials for cancer immunotherapy.
Review in Journal of hematology & oncology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 206 papers, 1 of them a synthesis 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
206 citing papers in PubMed, 1 synthesis or guideline pooled it, 355 citations in OpenAlex.
- Prognostic role of indoleamine 2,3-dioxygenase 1 expression in solid tumors: A systematic review and meta-analysis.Frontiers in oncology · 2022Pooled it
- Response-Adaptive Surgical Timing in Neoadjuvant Immunotherapy Demonstrates Enhanced Pathologic Treatment Response in Head and Neck Squamous Cell Carcinoma.Clinical cancer research : an official journal of the American Association for Cancer Research · 2025Trial
- Oncolytic virus therapy for hepatocellular carcinoma: A bibliometric analysis of research landscapes, hotspots, and clinical transformation trends from 2000 to mid-2025.Human vaccines & immunotherapeutics · 2026Review
- Spatial proteomics deciphers the immune niche landscape of non-ampullary duodenal adenocarcinoma.British journal of cancer · 2026Article
- IDO1 regulating ROS rhythm reveals glycogenolysis/PPP as a cancer treatment target.Nature chemical biology · 2026Article
- CPT1A-mediated IDO1 succinylation shapes EGFRvIII-driven resistance to tumor electric field therapy in glioblastoma.Nature communications · 2026Article
- Phase 1 study of KHK2455, a long-acting, potent and selective IDO1 inhibitor, in combination with avelumab in patients with locally advanced or metastatic urothelial carcinoma.Journal for immunotherapy of cancer · 2026Article
- Lipophilic Ligand Efficiency-Monitored Discovery of Potent, Achiral, and Bioavailable Apo-IDO1 Inhibitors.ACS medicinal chemistry letters · 2026Article
- Article
- IDO1 Silencing Enhances Cisplatin Sensitivity in Gastric Cancer Cells via Modulation of Apoptosis and Oxidative Stress.Current issues in molecular biology · 2026Article
- 20(S/R)-Ginsenoside Rh1 Alleviates AOM/DSS-Induced Colorectal Cancer: Gut-Microbiota Modulation and Tryptophan-Metabolism-Mediated AhR/PXR Activation and IDO1.International journal of molecular sciences · 2026Article
- A novel photosensitizer-based photodynamic therapy reprograms the Kynurenine-AhR axis to boost antitumor immunity in breast cancer.Redox biology · 2026Article
- The role of tumor metabolic reprogramming in acquired anti-PD-1/PD-L1 resistance.Translational lung cancer research · 2026Review
- Solute carrier transporters as metabolic gatekeepers in tumor-microenvironment crosstalk.Acta pharmacologica Sinica · 2026Review
- Artemether and Euphorbia factor L9 suppress kynurenine production through distinct effects on tryptophan metabolism.The Biochemical journal · 2026Article
- Article
- Tryptophan metabolites 3-hydroxykynurenine (3HK) and 3-hydroxyanthranilic acid (3HAA) increase oxidative stress and impair osteoblastic bone formation.The Journal of biological chemistry · 2026Article
- Kynurenine Pathway, Nrf2 and NF-κB Cross-Regulation in the CNS: An Overview.Molecular neurobiology · 2026Review
- Targeting Tryptophan Metabolism for Tuberculosis Biomarkers and Host-Directed Therapy.The Journal of infectious diseases · 2026Review
- Targeting Overexpressed IDO in Stromal Cells as a Potential Therapeutic Strategy in Multiple Myeloma.Cancer science · 2026Article
146 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
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Indoleamine 2,3-dioxygenase 1 (IDO1) is a heme enzyme that catalyzes the oxidation of L-tryptophan. Functionally, IDO1 has played a pivotal role in cancer immune escape via catalyzing the initial step of the kynurenine pathway, and overexpression of IDO1 is also associated with poor prognosis in various cancers. Currently, several small-molecule candidates and peptide vaccines are currently being assessed in clinical trials. Furthermore, the "proteolysis targeting chimera" (PROTAC) technology has also been successfully used in the development of IDO1 degraders, providing novel therapeutics for cancers. Herein, we review the biological functions of IDO1, structural biology and also extensively summarize medicinal chemistry strategies for the development of IDO1 inhibitors in clinical trials. The emerging PROTAC-based IDO1 degraders are also highlighted. This review may provide a comprehensive and updated overview on IDO1 inhibitors and their therapeutic potentials.
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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.