ReviewFrontiers in immunology2020
Inflammation-Induced Tryptophan Breakdown is Related With Anemia, Fatigue, and Depression in Cancer.
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 96 papers, 3 of them syntheses that pooled it.
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Who cites it
96 citing papers in PubMed, 3 syntheses or guidelines pooled it, 167 citations in OpenAlex.
- Diagnostic predictive models for cancer-related fatigue: current evidence and future directions.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2026Pooled it
- Pooled it
- Pooled it
- Effects of rice bran arabinoxylan compound on quality of life of cancer patients during active treatment: a randomised placebo-controlled pilot trial.Scientific reports · 2026Trial
- Cancer therapy-related cognitive impairment, part 1: an integrative clinical-mechanistic framework from phenotypes to convergent neurobiological pathways.Pharmacological reports : PR · 2026Review
- Kynurenine metabolism-related gene signature for prognostic stratification in hepatocellular carcinoma.Translational cancer research · 2026Article
- A Women-Centered Internet-Based Cognitive Behavioral Therapy for Depressive Symptoms (the 3D Program): Protocol for a Randomized Controlled Trial.JMIR research protocols · 2026Article
- Systemic implications of osteoarthritis: from local degeneration to systemic metabolic Dysregulation.Journal of translational medicine · 2026Review
- The Impact of the CALLY Index on All-Cause Mortality in Patients With Depression: A Longitudinal Analysis Using NHANES Data.Health science reports · 2026Article
- Review
- Interferon-Driven Tryptophan Metabolism Links Inflammation and Mental Health in Juvenile Dermatomyositis.Inflammation · 2026Article
- Discrimination of Tryptophan Enantiomers at Sub-pm Level by Multiparametric Analysis of a Label-Free Organic Immunosensor.Small methods · 2026Article
- The kynurenine pathway in depression and schizophrenia: convergent signals, divergent states, and clinical signatures.EXCLI journal · 2026Review
- Multi-omics analyses reveal significant differences in the gut microbiota and metabolites in children with Kawasaki disease in Northwest China.Frontiers in immunology · 2026Article
- Rice Bran Arabinoxylan Compound and Tryptophan Metabolism on Quality of Life of Cancer Patients: A Secondary Analysis of the RBAC-QoL Study.International journal of tryptophan research : IJTR · 2026Article
- Comorbidity Between Mood Disorders and Chronic Somatic Diseases, With a Focus on Cardiometabolic Disease, and Its Mechanistic Crosstalk.Depression and anxiety · 2026Review
- Development and validation of a machine learning model to predict moderate-to-severe cancer-related fatigue in breast cancer.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2025Article
- Branched-Chain Amino Acids Combined with Exercise Improves Physical Function and Quality of Life in Older Adults: Results from a Pilot Randomized Controlled Trial.Dietetics (Basel, Switzerland) · 2025Article
- Tabernanthalog, a Non-Hallucinogenic Psychedelic, Alleviates Cancer-Induced Cognitive Deficits via Serotonergic Pathways.International journal of molecular sciences · 2025Article
- Molecular, cellular, biochemical, and rehabilitative insights into exercise interventions for gynecological cancer prevention and survivorship: a narrative review.Journal of ovarian research · 2025Review
36 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Many patients with cancer suffer from anemia, depression, and an impaired quality of life (QoL). These patients often also show decreased plasma tryptophan levels and increased kynurenine concentrations in parallel with elevated concentrations of Th1 type immune activation marker neopterin. In the course of anti-tumor immune response, the pro-inflammatory cytokine interferon gamma (IFN-γ) induces both, the enzyme indoleamine 2,3-dioxygenase (IDO) to degrade tryptophan and the enzyme GTP-cyclohydrolase I to form neopterin. High neopterin concentrations as well as an increased kynurenine to tryptophan ratio (Kyn/Trp) in the blood of cancer patients are predictive for a worse outcome. Inflammation-mediated tryptophan catabolism along the kynurenine pathway is related to fatigue and anemia as well as to depression and a decreased QoL in patients with solid tumors. In fact, enhanced tryptophan breakdown might greatly contribute to the development of anemia, fatigue, and depression in cancer patients. IDO activation and stimulation of the kynurenine pathway exert immune regulatory mechanisms, which may impair anti-tumor immune responses. In addition, tumor cells can degrade tryptophan to weaken immune responses directed against them. High IDO expression in the tumor tissue is associated with a poor prognosis of patients. The efficiency of IDO-inhibitors to inhibit cancer progression is currently tested in combination with established chemotherapies and with immune checkpoint inhibitors. Inflammation-mediated tryptophan catabolism and its possible influence on the development and persistence of anemia, fatigue, and depression in cancer patients are discussed.
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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.