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Study M171

Study name

Zhu XX 2015

Title

Danzhi Xiaoyao San ameliorates depressive-like behavior by shifting toward serotonin via the downregulation of hippocampal indoleamine 2,3-dioxygenase

Overall design

The aim of this study was to investigate the hypothesis that Danzhi Xiaoyao San (DXS) treats depressive-like behavior by shifting the balance of the kynurenine (Kyn)/serotonin (5-HT) pathway toward the 5-HT pathway through the downregulation of hippocampal indoleamine 2,3-dioxygenase (IDO). Rats were divided into the following 4 groups (n = 10 in each group): (1) control group, (2) CUMS group, (3) CUMS + DXS group (stressor plus Danzhi Xiaoyao San treatment at the dose of 4 g/kg), and (4) CUMS + fluoxetine group (stressor plus fluoxetine treatment at the dose of 2 mg/kg). Cytokines, IDO, and tryptophan (Trp) catabolites were analyzed by enzyme-linked immunosorbent assay, western blot, and liquid chromatography-electrospray ionization tandem mass spectrometry, respectively. The CUMS stress procedure lasted for 3 weeks, and drugs were administered by gavage using a tube twice a day during the model building period.

Study Type

Type1;

Type2;

Data available

Unavailable

Organism

Rat; Sprague-Dawley rat;

Categories of depression

Animal model; Chronic mild stress model; Chronic mild stress model;

Criteria for depression

Sucrose preference test

Sample size

40

Tissue

Central; Brain; Hippocampus;

Platform

MS-based; LC-MS: Prominence 20A series UFLC System (Shimadzu, Kyoto, Japan) with API4000 Qtrap MS system (ABSciex, Massachusetts, USA);

PMID

25435286

DOI

10.1016/j.jep.2014.11.031

Citation

Zhu X, Jing L, Chen C, et al. Danzhi Xiaoyao San ameliorates depressive-like behavior by shifting toward serotonin via the downregulation of hippocampal indoleamine 2,3-dioxygenase. J Ethnopharmacol 2015;160:86-93.

Metabolite

L-Tryptophan;

5-Hydroxyindoleacetic acid;

L-Kynurenine;

Serotonin;

Kynurenine/Tryptophan ratio;