What does this research mean for the field?

A novel liquid chromatography-tandem mass spectrometry method enables the reliable quantification of 43 urinary aromatic amino acid-derived metabolites, revealing that the kynurenic acid/tryptophan ratio is significantly increased in Alport syndrome patients with chronic kidney disease. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To develop and validate a comprehensive LC-MS/MS method for quantifying urinary aromatic amino acid metabolites and evaluate metabolic dysregulation across stages of Alport syndrome.

August 22, 2026Analytical and Bioanalytical ChemistryOpen Access

Decoding the urinary metabolome of aromatic amino acid pathways in Alport syndrome

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Authors

DGDomniki GallouAristotle University of Thessaloniki JMJaime Morillas-ArmentaUniversidad San Pablo CEU MFMiguel Fernández-GarcíaUniversidad San Pablo CEU

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Implication

Metabolomic analysis reveals altered urinary aromatic amino acid profiles in Alport syndrome, indicating enhanced kynurenine pathway activation during renal decline.

Key Points

To develop and validate a comprehensive LC-MS/MS method for quantifying urinary aromatic amino acid metabolites and evaluate metabolic dysregulation across stages of Alport syndrome.
Developed and validated an LC-MS/MS platform utilizing six deuterated internal standards to quantify up to 43 urinary aromatic amino acid-derived and sulfated metabolites.
Profiled urine samples from healthy controls and Alport syndrome patients with and without chronic kidney disease.
Detected significant concentration differences across groups in metabolites from tryptophan, phenylalanine, and tyrosine pathways, including 4-OH-phenylacetic acid-O-sulfate.
Observed a marked elevation in the urinary kynurenic acid to tryptophan ratio in Alport syndrome patients with chronic kidney disease, reflecting enhanced kynurenine pathway activation.

Cite This Study

Gallou et al. (2026) studied this question.

synapsesocial.com/papers/6a895f53ca7ade938187deaf https://doi.org/10.1007/s00216-026-06707-8

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Implication

Metabolomic analysis reveals altered urinary aromatic amino acid profiles in Alport syndrome, indicating enhanced kynurenine pathway activation during renal decline.

Decoding the urinary metabolome of aromatic amino acid pathways in Alport syndrome

Discussion

Member takes

Implication

Key Points

Cite This Study

Decoding the urinary metabolome of aromatic amino acid pathways in Alport syndrome

Discussion

Member takes

Implication

Key Points

Cite This Study

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