ArticleScientific reports2020
Urine 6-Bromotryptophan: Associations with Genetic Variants and Incident End-Stage Kidney Disease.
Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.
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Who cites it
12 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.
- Genome-wide characterization of 54 urinary metabolites reveals molecular impact of kidney function.Nature communications · 2025Pooled it
- Metagenomic and Metabolomic Correlates of Immunotherapy Response in Non-Small Cell Lung Cancer.Research square · 2026Article
- Systematic Evaluation of Plasma and Urine Metabolites to Predict the Risk of Adverse Kidney-related Outcomes in Chronic Kidney Disease: The GCKD Study∗.Kidney medicine · 2026Article
- Discovery of urinary metabolite biomarkers of psychiatric disorders using two-sample Mendelian randomization.BMC psychiatry · 2026Article
- Metabolomic signatures suggest altered bile acid and energy metabolism in CRB1- retinopathies.Metabolomics : Official journal of the Metabolomic Society · 2026Article
- Chronic Viral Reactivation and Associated Host Immune Response and Clinical Outcomes in Acute COVID-19 and Post-Acute Sequelae of COVID-19.bioRxiv : the preprint server for biology · 2024Article
- Assessing the relationships of 1,400 blood metabolites with abdominal aortic aneurysm: a Mendelian randomization study.Frontiers in pharmacology · 2024Article
- Pharmacometabolomics of sulfonylureas in patients with type 2 diabetes: a cross-sectional study.Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques · 2024Article
- Molecular pathways that drive diabetic kidney disease.The Journal of clinical investigation · 2023Review
- Serum Metabolites and Kidney Outcomes: The Atherosclerosis Risk in Communities Study.Kidney medicine · 2022Article
- Clinical epidemiological analysis of cohort studies investigating the pathogenesis of kidney disease.Clinical and experimental nephrology · 2022Review
- Chronic Kidney Disease Cohort Studies: A Guide to Metabolome Analyses.Metabolites · 2021Review
Corrections and comments
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Authors and funding
13 authors at 8 institutions in 3 countries.
Funding
Abstract
Higher serum 6-bromotryptophan has been associated with lower risk of chronic kidney disease (CKD) progression, implicating mechanisms beyond renal clearance. We studied genetic determinants of urine 6-bromotryptophan and its association with CKD risk factors and incident end-stage kidney disease (ESKD) in 4,843 participants of the German Chronic Kidney Disease (GCKD) study. 6-bromotryptophan was measured from urine samples using mass spectrometry. Patients with higher levels of urine 6-bromotryptophan had higher baseline estimated glomerular filtration rate (eGFR, p < 0.001). A genome-wide association study of urine 6-bromotryptophan identified two significant loci possibly related to its tubular reabsorption, SLC6A19, and its production, ERO1A, which was also associated with serum 6-bromotryptophan in an independent study. The association between urine 6-bromotryptophan and time to ESKD was assessed using Cox regression. There were 216 ESKD events after four years of follow-up. Compared with patients with undetectable levels, higher 6-bromotryptophan levels were associated with lower risk of ESKD in models unadjusted and adjusted for ESKD risk factors other than eGFR (<median level: cause-specific hazard ratio [HR] 0.70, 95% confidence interval [CI] 0.51 to 0.97; ≥median level: HR 0.50, 95% CI 0.34 to 0.74). Upon adjustment for baseline eGFR, this association became attenuated, suggesting that urine 6-bromotryptophan may represent a correlated marker of kidney health.
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Registered trials
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