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Study M489

Study name

Wu YJ 2018

Title

Kynurenine pathway changes in late-life depression

Overall design

The aim of this study was to investigate whether tryptophan (TRP) metabolism and kynurenine (KYN) metabolism are imbalanced in late-life depression (LLD) patients and to explore the differences in kynurenine pathway (KP) characteristics between early onset depression (EOD) and late onset depression (LOD) patients. The authors investigated 170 LLD patients (depression group, EOD 90, LOD 80) and 135 normal controls (control group). Serum concentrations of TRP, KYN and kynurenic acid (KYNA) were detected by the liquid chromatography-tandem mass spectrometry method.

Study Type

Type1;

Data available

Unavailable

Organism

Human;

Categories of depression

Depressive disorder; Geriatric depression; Geriatric depression;

Criteria for depression

DSM-IV diagnosed MDD

Sample size

305

Tissue

Peripheral; Blood; Serum;

Platform

MS-based; LC-MS: not reported;

PMID

29655078

DOI

10.1016/j.jad.2018.04.007

Citation

Wu Y, Zhong X, Mai N, et al. Kynurenine pathway changes in late-life depression. J Affect Disord. 2018;235:76-81.

Metabolite

L-Tryptophan;

L-Kynurenine;

Kynurenic acid;

Kynurenine/Tryptophan ratio;

Kynurenic acid/Kynurenine ratio;