SynthesisMolecular psychiatry2021
The kynurenine pathway in bipolar disorder: a meta-analysis on the peripheral blood levels of tryptophan and related metabolites.
Synthesis in Molecular psychiatry, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 60 papers, 5 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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
60 citing papers in PubMed, 5 syntheses or guidelines pooled it, 93 citations in OpenAlex.
- Complete blood count-based inflammatory ratios in people with bipolar disorder: a systematic review and meta-analysis of neutrophil-to-lymphocyte, monocyte-to-lymphocyte, and platelet-to-lymphocyte ratios.European psychiatry : the journal of the Association of European Psychiatrists · 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
- Characterizing the clinical profile of mania without major depressive episodes: a systematic review and meta-analysis of factors associated with unipolar mania.Psychological medicine · 2023Pooled it
- Dynamic changes in metabolites of the kynurenine pathway in Alzheimer's disease, Parkinson's disease, and Huntington's disease: A systematic Review and meta-analysis.Frontiers in immunology · 2022Pooled it
- Tryptophan Catabolites in Bipolar Disorder: A Meta-Analysis.Frontiers in immunology · 2021Pooled it
- Inflamed but not impulsive: Acute inflammatory cytokine response does not impact prepotent response inhibition.Journal of affective disorders · 2023Trial
- Acute administration of ibuprofen increases serum concentration of the neuroprotective kynurenine pathway metabolite, kynurenic acid: a pilot randomized, placebo-controlled, crossover study.Psychopharmacology · 2022Trial
- Mendelian-Randomization Study Reveals Causal Relationships Between Blood Metabolites and Psychiatric Disorders.Schizophrenia bulletin · 2026Article
- The Effects of Transcranial Magnetic Stimulation on Tryptophan Metabolism and Depressive-Like Behavior in Mice.Brain and behavior · 2026Article
- A multi-omics analysis of gut bacteriome, virome, and serum metabolome in bipolar depression.Npj mental health research · 2026Article
- Kynurenine pathway dysregulation in major depressive disorder: the convergence of excitotoxicity, neuroinflammation, and oxidative stress.Journal of neuroinflammation · 2026Review
- Interferon-Driven Tryptophan Metabolism Links Inflammation and Mental Health in Juvenile Dermatomyositis.Inflammation · 2026Article
- Chemotherapy-Induced Remodeling of the Gut Microbiota-Inflammation Axis: Implications for the Course of Bipolar Disorder.Journal of multidisciplinary healthcare · 2026Review
- The kynurenine pathway in depression and schizophrenia: convergent signals, divergent states, and clinical signatures.EXCLI journal · 2026Review
- Clinical Insights Into the Mechanistic Crossroads of Lamotrigine and Therapeutic Ketosis in Bipolar Depression.Biological psychiatry global open science · 2026Review
- A review of mechanisms and optimization strategies for clinical improvement after repetitive transcranial magnetic stimulation in bipolar disorder.Frontiers in psychiatry · 2026Review
- Comparing plasma levels and ratios of tryptophan, serotonin, kynurenine and quinolinic acid between patients with bipolar disorder and healthy controls: impact of depressive episode or post-traumatic stress disorder symptoms.Frontiers in psychiatry · 2025Article
- Alterations of Blood Plasma Metabolites, Including Kynurenine and Tryptophan, in Bipolar Disorder.Neuropsychiatric disease and treatment · 2025Article
- Sirtuin 1 regulates the phenotype and functions of dendritic cells through Ido1 pathway in obesity.Cell death & disease · 2024Article
- Male-biased vulnerability of mouse brain tryptophan/kynurenine and glutamate systems to adolescent exposures to concentrated ambient ultrafine particle air pollution.Neurotoxicology · 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
8 authors at 4 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Growing evidence suggests that a dysregulation of the kynurenine pathway (KP) occurs in bipolar disorder (BD). This systematic review and meta-analysis aimed at assessing the possible differences in peripheral blood levels of KP metabolites between individuals with BD and healthy controls. We searched Medline, Embase, and PsycInfo electronic databases for articles indexed up to February 2020. We included any observational study comparing the peripheral blood levels of at least one KP metabolite between adults with BD and healthy controls. Random-effects meta-analyses were carried out generating pooled standardized mean differences (SMDs). Heterogeneity between studies was estimated using the I
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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.