The traditional Chinese medicine formula Chaihu Shugan San reduces depressive-like behaviors by interfering with specific complex formations in the brain and inhibiting excess excitability.
The methodology employed in this study encompassed undertaking behavioral experiments and an enzyme-linked immunosorbent assay to evaluate depressive-like behaviors. The researchers also estimated the serum levels of Adrenocorticotropic Hormone and Corticosterone levels in rats subjected to chronic unpredictable mild stress conditions. Techniques such as Western blotting, immunofluorescence, and Co-Immunoprecipitation were utilized to investigate the expressions and associations of the alpha-2-delta-1 and N-methyl-D-aspartate receptor subunit NR1 in the hypothalamus. Additionally, an in vitro testing used a gene knockout technique for Cacna2d1 and a disruptive peptide for further investigation in relation to alpha-2-delta-1-NR1 complex.
In terms of results, the traditional Chinese medication Chaihu Shugan San, was found to alleviate depressive-like behaviors in stressed rats and reduce the serum levels of the aforementioned hormones. It reversed the upregulated expression of alpha-2-delta-1 and NR1 in these rat's hypothalamus, resulting in weakening alpha-2-delta-1-NR1 complex association. Consequently, with the interruption in complex formations, this led to the inhibition of the excessive excitability of the hypothalamic-pituitary-adrenal axis that is often observed in depression.
