LI Yong-biao,WU Lan-lan,FAN Yu-qing,et al.1H-NMR Metabolomic Analysis of Brain Tissue of CUMS-Induced Depressed Mice Intervened by Iridoid Part of Valerianae Jatamansi Rhizoma et Radix[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(19):195-203.
LI Yong-biao,WU Lan-lan,FAN Yu-qing,et al.1H-NMR Metabolomic Analysis of Brain Tissue of CUMS-Induced Depressed Mice Intervened by Iridoid Part of Valerianae Jatamansi Rhizoma et Radix[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(19):195-203. DOI: 10.13422/j.cnki.syfjx.20201249.
1H-NMR Metabolomic Analysis of Brain Tissue of CUMS-Induced Depressed Mice Intervened by Iridoid Part of Valerianae Jatamansi Rhizoma et Radix
Metabolomics was used to analyze the brain tissue samples of model mice with chronic unpredictable mild stress (CUMS) depression
in order to find out the differential metabolites related to depression and to explore the possible antidepressant mechanism of iridoid part of Valerianae Jatamansi Rhizoma et Radix (IEFV).
Method
2
Forty-two Kunming mice were randomly divided into 6 groups
including the normal group
the model group
the fluoxetine group (2.5 mg·kg
-1
) and the IEFV low
medium
and high dose groups (doses were 5.73
11.47
22.94 mg·kg
-1
respectively). The behavioral and biochemical indicators of CUMS model mice were used for pharmacodynamic evaluation with IEFV and a positive drug (fluoxetine) as the intervention drugs. Then
the effect of IEFV on endogenous substances of the brain tissue in CUMS model mice were analyzed by nuclear magnetic resonance hydrogen spectrum (
1
H-NMR) metabolomics
and multivariate statistical analysis was used to identify the differential metabolites and to enrich the metabolic pathways involved in the differential metabolites.
Result
2
After modeling
the immobility time of the model mice increased significantly
their sucrose preference rate and the excitatory neurotransmitters [5-hydroxytryptamine (5-HT) and norepinephrine (NE)] decreased significantly
indicating the success of modeling. The depression was relieved after IEFV administration
mainly manifested by the recovery of the immobility time
sucrose preference rate and the excitatory neurotransmitters (5-HT and NE). Principal component analysis (PCA) of endogenous metabolites in brain tissue showed that the model group could be significantly separated from the normal group
while the IEFV groups and fluoxetine group all showed a trend of deviating from the model group to the normal group
which was consistent with the behavioral results. The results of orthogonal partial least squares discriminant analysis (OPLS-DA) showed that there were 16 different metabolites between the model group and the normal group
including 12 water-soluble metabolites and 4 liposoluble metabolites. Seven potential metabolism pathways were obtained through MetPA analysis
including metabolism of phenylalanine
metabolism of phenylalanine
tyrosine and tryptophan
metabolism of taurine and hypotaurine acid
metabolism of alanine
aspartic acid and glutamic acid
biosynthesis of valine
leucine and isoleucine
metabolism of
D
-glutamine and
D
-glutamate and tricarboxylic acid cycle (TCA). IEFV-high dose group could significantly recall 11 differential metabolites.
Conclusion
2
IEFV may play an antidepressant role mainly by affecting energy metabolism
amino acid metabolism and neurotransmitter levels
which provides a reference for further study on the antidepressant mechanism of IEFV.
关键词
Keywords
references
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