ReviewInternational journal of molecular sciences2020
The Role of the Kynurenine Signaling Pathway in Different Chronic Pain Conditions and Potential Use of Therapeutic Agents.
Review in International journal of molecular sciences, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 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
52 citing papers in PubMed, 1 synthesis or guideline pooled it, 83 citations in OpenAlex.
- Sexually Dimorphic Neuroimmune Pathways in Chronic Pain: A Comprehensive Systematic Review of Cellular and Molecular Mechanisms.Biomolecules · 2026Pooled it
- Clinical Relevance of Oxidative Imbalance in Patients with Temporomandibular Disorder-Myofascial Pain with Referral: An Exploratory Case-Control Study.Antioxidants (Basel, Switzerland) · 2026Article
- Cannabidiol (CBD) modulates the serotonin-kynurenine metabolic balance in the brain of morphine-tolerant neuropathic rats.Pharmacological reports : PR · 2026Article
- Bridging the gap: molecular mechanisms, regional activity and connectivity in headache disorders.Brain : a journal of neurology · 2026Review
- Indoleamine 2,3-Dioxygenase: A Potential Biomarker for Neural Damage Severity of Leprosy Neuropathy.Cellular and molecular neurobiology · 2026Article
- Review
- Gut mucosal microbiota and local intervertebral disc immunity: candidate circulating-cytokine-independent pathways informed by Mendelian randomization evidence.Frontiers in immunology · 2026Review
- Characterization of acupuncture on central amino acid metabolism based on targeted neurotransmitter analysis in mice with inflammatory pain.Journal of traditional Chinese medicine = Chung i tsa chih ying wen pan · 2025Article
- IDO1 modulates pain sensitivity and comorbid anxiety in chronic migraine through microglial activation and synaptic pruning.Journal of neuroinflammation · 2025Article
- Using metabolomics to investigate the relationship between the metabolomic profile of the intestinal microbiota derivatives and mental disorders in inflammatory bowel diseases: a narrative review.Research in pharmaceutical sciences · 2025Review
- Tryptophan metabolism at the crossroads of the neuro-immuno-microbial axis: implications for precision medicine in chronic diseases.Frontiers in cellular and infection microbiology · 2025Review
- Redefining Roles: A Paradigm Shift in Tryptophan-Kynurenine Metabolism for Innovative Clinical Applications.International journal of molecular sciences · 2024Review
- A deep learning framework combining molecular image and protein structural representations identifies candidate drugs for pain.Cell reports methods · 2024Article
- The Gut Microbiome and Symptom Burden After Kidney Transplantation: An Overview and Research Opportunities.Biological research for nursing · 2024Review
- Association of the Serotonin and Kynurenine Pathways as Possible Therapeutic Targets to Modulate Pain in Patients with Fibromyalgia.Pharmaceuticals (Basel, Switzerland) · 2024Review
- Article
- Tryptophan metabolism in digestive system tumors: unraveling the pathways and implications.Cell communication and signaling : CCS · 2024Review
- New insights into healthy ageing, inflammageing and frailty using metabolomics.Frontiers in aging · 2024Review
- Dock4 contributes to neuropathic pain by regulating spinal synaptic plasticity in mice.Frontiers in molecular neuroscience · 2024Article
- Oxidative imbalance as a co-player in jaw functional limitations and biopsychosocial profile in patients with temporomandibular disorder-myofascial pain with referral.Frontiers in neurology · 2024Article
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
Tryptophan (TRP) is an essential, aromatic amino acid catabolized by indoleamine 2,3-dioxygenase (IDO) and tryptophan 2,3-dioxygenase (TDO) enzymes into kynurenine. The IDO enzyme is expressed in peripheral tissues and the central nervous system. Another enzyme of interest in the kynurenine signaling pathway is kynurenine 3-monooxygenase (KMO). The purpose of this review is to discuss the role of TRP and the kynurenine signaling pathway in different chronic pain patients. The IDO-1, IDO-2, and KMO enzymes and the kynurenine metabolite have been shown to be involved in the pathogenesis of neuropathic pain and other painful conditions (migraine, cluster headache, etc.) as well as depressive behavior. We highlighted the analgesic potential of novel agents targeting the enzymes of the kynurenine signaling pathway to explore their efficacy in both future basic science and transitional studies. Upcoming studies conducted on animal models will need to take into consideration the differences in TRP metabolism between human and non-human species. Since chronic painful conditions and depression have common pathophysiological patterns, and the kynurenine signaling pathway is involved in both of them, future clinical studies should aim to have outcomes targeting not only pain, but also functionality, mood changes, and quality of life.
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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.