ReviewBritish journal of cancer2020
The therapeutic potential of targeting tryptophan catabolism in cancer.
Review in British journal of cancer, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 184 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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
184 citing papers in PubMed, 1 synthesis or guideline pooled it, 288 citations in OpenAlex.
- The Future of Cancer Diagnosis, Treatment and Surveillance: A Systemic Review on Immunotherapy and Immuno-PET Radiotracers.Molecules (Basel, Switzerland) · 2021Pooled it
- Spatial habitat radiomics predicts tertiary lymphoid structure status and identifies an IDO1Journal for immunotherapy of cancer · 2026Article
- Tryptophan metabolism in tumor microenvironment and therapeutic implications.Journal of advanced research · 2026Review
- Review
- The Mechanism and Pathways of Formation and Modification of Salivary Metabolic Profile in Cancer.Current issues in molecular biology · 2026Review
- Immunometabolic Stress and Immune Suppression in Clear-Cell Renal Cell Carcinoma: Perspectives in Therapeutic Strategy.International journal of molecular sciences · 2026Review
- 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
- Single-Cell Transcriptomic Profiling Reveals Dual Antitumor and Adaptive Resistance Mechanisms of a Novel HSP90 Inhibitor, SP11, in T-Cell Acute Lymphoblastic Leukemic Cells and DLA Mouse Model.International journal of molecular sciences · 2026Article
- Complement factor B deficiency promotes lung cancer progression via FOS-mediated tryptophan metabolism and immune suppression.Communications medicine · 2026Article
- Review
- Emphysema Shapes a Pro-Inflammatory Immune Microenvironment in Pulmonary Adenocarcinoma: A Pilot Immune Transcriptomic Profiling Study.International journal of molecular sciences · 2026Article
- Functional segregation of HIF-1α and AhR controls NK cell responsiveness under hypoxia.iScience · 2026Article
- A conceptual blueprint for "turning cold to hot" in Osteosarcoma: from TME stratification hypotheses to adaptive therapeutic prospects.Cell communication and signaling : CCS · 2026Review
- Artemether and Euphorbia factor L9 suppress kynurenine production through distinct effects on tryptophan metabolism.The Biochemical journal · 2026Article
- Molecular mechanisms and therapeutic potential of tryptophan metabolism in gut-brain signaling transduction: a narrative review.Journal of neuroinflammation · 2026Review
- Genebody specific epigenomic reprogramming of transcriptome promotes immune evasion in oropharyngeal cancer patients in North-Eastern India.Clinical epigenetics · 2026Article
- Quinolinic acid as trigger/biomarker of dysosmia/dysgeusia in patients with acute coronavirus disease 2019: A retrospective case-control study.Brain, behavior, & immunity - health · 2026Article
- Metabolomic and transcriptomic analyses identify metabolic alterations and immune suppression in ovarian cancer.Scientific reports · 2026Article
- CMTM6-Silencing Microbial Immunotherapy Reprograms PDAC Tumors and Restores T-cell Function.bioRxiv : the preprint server for biology · 2026Article
- The aryl hydrocarbon receptor: structure, signaling, physiology and pathology.Signal transduction and targeted therapy · 2026Review
124 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
7 authors at 3 institutions in 2 countries.
Funding
Abstract
Based on its effects on both tumour cell intrinsic malignant properties as well as anti-tumour immune responses, tryptophan catabolism has emerged as an important metabolic regulator of cancer progression. Three enzymes, indoleamine-2,3-dioxygenase 1 and 2 (IDO1/2) and tryptophan-2,3-dioxygenase (TDO2), catalyse the first step of the degradation of the essential amino acid tryptophan (Trp) to kynurenine (Kyn). The notion of inhibiting IDO1 using small-molecule inhibitors elicited high hopes of a positive impact in the field of immuno-oncology, by restoring anti-tumour immune responses and synergising with other immunotherapies such as immune checkpoint inhibition. However, clinical trials with IDO1 inhibitors have yielded disappointing results, hence raising many questions. This review will discuss strategies to target Trp-degrading enzymes and possible down-stream consequences of their inhibition. We aim to provide comprehensive background information on Trp catabolic enzymes as targets in immuno-oncology and their current state of development. Details of the clinical trials with IDO1 inhibitors, including patient stratification, possible effects of the inhibitors themselves, effects of pre-treatments and the therapies the inhibitors were combined with, are discussed and mechanisms proposed that might have compensated for IDO1 inhibition. Finally, alternative approaches are suggested to circumvent these problems.
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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.