Abstract
In this study, we used Chaihu Shugan San (CSS), a traditional Chinese herbal formula, as a probe to investigate the involvement of brain functional network connectivity and hippocampus energy metabolism in perimenopausal depression. A network pharmacology approach was performed to discover the underlying mechanisms of CSS in improving perimenopausal depression, which were verified in perimenopausal depression rat models. Network pharmacology analysis indicated that complex mechanisms of energy metabolism, neurotransmitter metabolism, inflammation, and hormone metabolic processes were closely associated with the anti-depressive effects of CSS. Thus, the serum concentrations of estradiol (E2), glutamate (Glu), and 5-hydroxytryptamine (5-HT) were detected by ELISA. The brain functional network connectivity between the hippocampus and adjacent brain regions was evaluated using resting-state functional magnetic resonance imaging (fMRI). A targeted metabolomic analysis of the hippocampal tricarboxylic acid cycle was also performed to measure the changes in hippocampal energy metabolism using liquid chromatography-tandem mass spectrometry (LC–MS/MS). CSS treatment significantly improved the behavioral performance, decreased the serum Glu levels, and increased the serum 5-HT levels of PMS + CUMS rats. The brain functional connectivity between the hippocampus and other brain regions was significantly changed by PMS + CUMS processes but improved by CSS treatment. Moreover, among the metabolites in the hippocampal tricarboxylic acid cycle, the concentrations of citrate and the upregulation of isocitrate and downregulation of guanosine triphosphate (GTP) in PMS + CUMS rats could be significantly improved by CSS treatment. A brain functional network connectivity mechanism may be involved in perimenopausal depression, wherein the hippocampal tricarboxylic acid cycle plays a vital role.
Graphical Abstract
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Data Availability
The datasets for this study can be found in the jianguoyun (https://www.jianguoyun.com/p/DYUQoqUQstXtChi_oP8EIAA).
Abbreviations
- CSS:
-
Chaihu Shugan San
- PMS:
-
Perimenopausal syndrome
- CUMS:
-
Chronic unpredictable mild stress
- E2:
-
Estradiol
- Glu:
-
Glutamate
- 5-HT:
-
5-Hydroxytryptamine
- fMRI:
-
Functional magnetic resonance imaging
- LC–MS/MS:
-
Liquid chromatography-tandem mass spectrometry
- OVX:
-
Ovariectomized
- BOLD:
-
Blood oxygen level-dependent
- TCM:
-
Traditional Chinese Medicine
- FST:
-
Forced swimming test
- SPT:
-
Sucrose preference test
- OFT:
-
Open field test
- SPM:
-
Statistical Parametric Mapping
- UPLC:
-
Ultra performance liquid chromatography
- CUR:
-
Curtain Gas
- ISVF:
-
Ion Sapary Voltage Floating
- MRM:
-
Multiple reaction monitoring
- MDD:
-
Major depressive disorder
- HPA:
-
Hypothalamic–pituitary–adrenal axis (HPA)
- CRS:
-
Chronic restraint stress
- LAu:
-
Left auditory cortex
- LCPu:
-
Left caudate putamen
- LDTLN:
-
Left dorsal tegmental lateral nucleus
- LHip:
-
Left hippocampus
- LM:
-
Left motor cortex
- LRS:
-
Left retrosplenial cortex
- LV:
-
Left visual cortex
- ROI:
-
Region of interest
- RCPu:
-
Right caudate putamen
- RDTLN:
-
Right dorsal tegmental lateral nucleus
- RHip:
-
Right hippocampus
- RMO:
-
Right medulla oblongata
- RPFC:
-
Right prefrontal cortex
- ROF:
-
Right olfactory cortex
- RRS:
-
Right retrosplenial cortex
- RS:
-
Right sensory cortex
- FID-EPI:
-
Free induction decay echo planar imaging
- FC:
-
Functional connectivity
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Acknowledgements
We would like to give our sincere gratitude to the reviewers for their constructive comments.
Funding
This study was funded by the National Natural Science Foundation of China (No. 82274409 and 82174248) and the Natural Science Foundation of Fujian Province (No. 2023J01868).
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Conceptualization, R.T.H. and G.M.; data curation, R.T.H. and X.T.; formal analysis, S.X.L. and J.Y.S.; funding acquisition, W.N.L.; investigation, L.M.; methodology, L.M. and L.G.; writing original draft, R.T.H. and G.M.; writing—review and editing, W.N.L. All authors have read and agreed to the published version of the manuscript.
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The animal study was reviewed and approved by the Animal Care and Use Committee of the Fujian University of TCM (Approval number: FJTCM IACUC 2020026).
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Huang, R., Gong, M., Tan, X. et al. Effects of Chaihu Shugan San on Brain Functional Network Connectivity in the Hippocampus of a Perimenopausal Depression Rat Model. Mol Neurobiol 61, 1655–1672 (2024). https://doi.org/10.1007/s12035-023-03615-1
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DOI: https://doi.org/10.1007/s12035-023-03615-1