ArticleNeuropsychopharmacology : official publication of the American College of Neuropsychopharmacology2020
Associations among peripheral and central kynurenine pathway metabolites and inflammation in depression.
Article in Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05567653 (Effects of 3-month Probiotic Mix Supplementation), which is not on this map. Cited by 102 papers, 8 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.
Effects of 3-month Probiotic Mix Supplementation (L. Helveticus R-0052, B. Longum R-0175) on Gut Microbiota and Metabolome, Endocannabinoid and Immune Systems Activation, Along With Symptoms of Fatigue in Professional Dancers
Who cites it
102 citing papers in PubMed, 8 syntheses or guidelines pooled it, 159 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
- The association of blood biomarkers with cerebral white matter and myelin content in bipolar disorder: a systematic review.Revista brasileira de psiquiatria (Sao Paulo, Brazil : 1999) · 2024Pooled it
- Non-Invasive Brain Stimulation Effects on Biomarkers of Tryptophan Metabolism: A Scoping Review and Meta-Analysis.International journal of molecular sciences · 2022Pooled it
- The kynurenine pathway in major depressive disorder, bipolar disorder, and schizophrenia: a meta-analysis of 101 studies.Molecular psychiatry · 2021Pooled it
- Ketamine's effect on inflammation and kynurenine pathway in depression: A systematic review.Journal of psychopharmacology (Oxford, England) · 2021Pooled it
- The kynurenine pathway in bipolar disorder: a meta-analysis on the peripheral blood levels of tryptophan and related metabolites.Molecular psychiatry · 2021Pooled it
- BrainFrontiers in immunology · 2021Pooled it
- Effect of immune activation on the kynurenine pathway and depression symptoms - A systematic review and meta-analysis.Neuroscience and biobehavioral reviews · 2020Pooled it
- The interaction between kynurenine pathway, suicidal ideation and augmentation therapy with minocycline in patients with treatment-resistant depression.Journal of psychopharmacology (Oxford, England) · 2023Trial
- Peripheral inflammatory biomarkers define biotypes of bipolar depression.Molecular psychiatry · 2021Trial
- Sleep fragmentation and heightened inflammation: A latent profile subtype predicting nine-year major depressive disorder severity in the MIDUS study.Brain, behavior, & immunity - health · 2026Article
- The Tryptophan-Kynurenine Pathway as a Key Mediator of the Gut-Brain Axis in Depression and Alzheimer's Disease.International journal of molecular sciences · 2026Review
- Dietary Tryptophan Allocation in Depression: Serotonin-Kynurenine Balance, Microbial Indole Pathways, and Inflammatory Phenotypes.Nutrients · 2026Review
- Mechanism-First Psychobiotics: Fermented Vegetables, Dairy, and Soy for Depression and Anxiety.International journal of molecular sciences · 2026Review
- The potential role of kynurenine pathway and inflammation in pediatric obsessive-compulsive disorder with and without major depressive disorder comorbidity.Journal of neural transmission (Vienna, Austria : 1996) · 2026Article
- Changes in kynurenine pathway metabolites and brain structure in response to behavioral activation therapy.Brain, behavior, and immunity · 2026Article
- Life Cycle and Circadian Rhythms in Central Resident Immunity and Neuropsychiatric Pathology.Neuroscience bulletin · 2026Review
- Kynurenine pathway dysregulation in major depressive disorder: the convergence of excitotoxicity, neuroinflammation, and oxidative stress.Journal of neuroinflammation · 2026Review
- Contextual Regulation of the Kynurenine Pathway and Its Relevance for Personalized Psychiatry.Journal of personalized medicine · 2026Review
- Gut-brain health effects of PREbiotics in older adults with suspected COgnitive DEcline: design of the PRECODE randomised placebo-controlled trial.Frontiers in nutrition · 2026Article
42 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
8 authors at 2 institutions in 1 country.
Funding
Abstract
Kynurenine pathway (KP) metabolites are believed to be a link between inflammation and depression through effects on brain glutamate receptors. However, neither the relationship between plasma and cerebrospinal fluid (CSF) KP metabolites nor their association with inflammatory mediators is well-established in depression. Moreover, the clinical profile associated with combined activation of plasma inflammatory and kynurenine pathways is unknown. Accordingly, plasma and CSF-KP metabolites and inflammatory markers along with depressive symptoms and antidepressant treatment response were measured in 72 unmedicated depressed patients. Following bivariate analyses, component factors representing immune and kynurenine variables in the plasma and CSF were extracted and were used to examine directionality of associations in a path model. In addition, patients were clustered using individual markers that most accounted for the association between plasma immune and KP systems. Path analysis revealed a directional association extending from plasma inflammatory markers to plasma kynurenines, to CSF kynurenines. Among immune markers, plasma tumor necrosis factor (TNF) was robustly associated with plasma kynurenine (KYN) and KYN/tryptophan (TRP), which was in turn significantly associated with CSF KYN, kynurenic acid, and quinolinic acid. Clustering of patients based on plasma TNF and KYN/TRP yielded subgroups of high (N = 17) and low (N = 55) TNF-KYN/TRP groups. High TNF-KYN/TRP subjects exhibited greater depression severity, anhedonia, and treatment nonresponse. In conclusion, plasma-KP metabolites may mediate an inflammation-associated depressive symptom profile via CNS KP metabolites that can serve as a target for intervention at the level of inflammation, peripheral KYN metabolism, KYN transport to the brain, or effects of KP metabolites on glutamate receptors.
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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.