Chaihu-Shugan San, a traditional Chinese medicine, offers potential antidepressant effects by targeting liver qi and specific synapse-related proteins in the brain.
The study used serum medicinal chemistry and network pharmacology methods to investigate the mechanisms of Chaihu-Shugan San (CHSGS) in treating depression. Initially, they screened the chemical components of CHSGS from available databases to be used in their study. Subsequently, they examined the antidepressant mechanism of CHSGS by focusing on soothing the liver and relieving depression, using serum pharmacochemistry. Proteomics and high-throughput data were further employed to ascertain the validity of CHSGS's antidepressant mechanism.
The researchers identified 9 bioactive substances in CHSGS through serum medicinal chemistry. These ingredients, which included nobiletin and ferulic acid among others, were found to have good oral bioavailability and non-toxicity. Based on liver ChIPseq data, CHSGS was found to act on 8 specific targets localized in the liver. Network pharmacology analyses also linked 9 blood components of CHSGS with 63 antidepressant targets in the brain. Notably, CHSGS was validated to exert antidepressant effects on the synaptic structure and neuronal function by targeting multiple synapse-related proteins.