Network pharmacology- and molecular docking-based investigation on the mechanism of action of Si-ni San in the treatment of depression combined with anxiety and experimental verification in adolescent rats.

Feeling anxious and depressed at the same time is increasingly common among teenagers, a trend that has worsened since the COVID-19 pandemic. Researchers are searching for safe, effective treatments — and traditional Chinese medicine may offer some promising answers. A recent study published in Frontiers in Psychiatry investigated a classic herbal formula called Si-ni San to understand how it might help young people struggling with both depression and anxiety at the same time.

Si-ni San is a well-known formula in Traditional Chinese Medicine (TCM) that has long been used to support emotional balance. But until now, scientists weren't sure exactly how it worked in the body. This study used advanced computer-based techniques — called network pharmacology and molecular docking — to map out the formula's active ingredients and identify which biological targets they interact with. The researchers then tested their findings in adolescent rats that were exposed to early-life stress and ongoing mild stress, mimicking the conditions that can trigger depression and anxiety in teenagers.

The results were encouraging. Si-ni San contains powerful plant compounds — including quercetin, luteolin, and kaempferol — that appear to reduce inflammation in the brain, particularly in an area called the hippocampus, which plays a key role in mood regulation. The formula seemed to work by calming inflammatory pathways (including the TNF pathway) and activating the body's natural antioxidant defenses (the Nrf2 pathway). In the stressed rats, Si-ni San significantly reduced both depression-like and anxiety-like behaviors.

For patients, this research offers a scientific window into why TCM herbal formulas may support mental and emotional wellbeing. While more human clinical trials are needed, the findings suggest that Si-ni San could be a valuable complementary option for adolescents experiencing anxiety and depression together. If you're interested in exploring herbal medicine as part of your care, speak with a licensed and qualified TCM practitioner.

This study investigated the mechanisms underlying Si-ni San's (SNS) therapeutic effects on comorbid depression and anxiety in adolescents using network pharmacology, molecular docking, molecular dynamics simulation, and in vivo experimental verification. Computational analysis identified 256 active ingredients and 1,128 potential targets, with quercetin, luteolin, kaempferol, nobiletin, and formononetin emerging as lead compounds demonstrating strong binding affinity to PTGS2 and PPARγ. Key pathways implicated include PI3K-Akt, TNF, IL-17, HIF-1, and AGE-RAGE signaling. In adolescent rats subjected to early maternal separation combined with chronic unpredictable mild stress (CUMS), SNS significantly attenuated both depression- and anxiety-like behaviors. qPCR analysis confirmed SNS modulated oxidative stress and neuroinflammatory responses in the hippocampus via TNF and Nrf2 pathway regulation. Clinical takeaway: SNS may offer a multi-target, anti-neuroinflammatory mechanism relevant to adolescent comorbid mood disorders, supporting its consideration as an adjunctive herbal intervention pending human clinical trials.