Electroacupuncture at Tianshu (ST25) and Zusanli (ST36) alleviates stress-induced irritable bowel syndrome in mice by modulating gut microbiota and corticotropin-releasing factor.

Researchers in China investigated whether electroacupuncture could help relieve irritable bowel syndrome (IBS) caused by stress. IBS is a common digestive disorder that causes abdominal pain, bloating, and changes in bowel habits, and stress often makes symptoms worse.

The study used 30 mice divided into three groups: normal mice, stressed mice with IBS, and stressed mice treated with electroacupuncture. Researchers created IBS-like symptoms by exposing mice to water avoidance stress, a method that mimics chronic psychological stress in humans. The treatment group received electroacupuncture at two specific points: Tianshu (ST25), located on the abdomen near the navel, and Zusanli (ST36), found on the lower leg.

The results showed that electroacupuncture successfully reduced visceral hypersensitivity, which is the heightened pain sensitivity in the digestive tract that IBS patients experience. The researchers discovered two important mechanisms behind these improvements. First, electroacupuncture helped restore balance to the gut microbiome—the community of bacteria living in the intestines that stress had disrupted. Second, it reduced elevated levels of corticotropin-releasing factor (CRF), a stress hormone that contributes to IBS symptoms.

This research adds to growing evidence that acupuncture may help manage stress-related digestive problems by working through multiple pathways: calming the stress response and supporting healthy gut bacteria. While this study was conducted in animals, it provides valuable insight into how acupuncture might benefit people with stress-induced IBS.

If you're considering acupuncture for digestive issues, seek treatment from a licensed acupuncturist with experience in gastrointestinal conditions.

This animal study examined electroacupuncture's effects on stress-induced IBS using 30 C57BL/6 mice randomly allocated to normal, water avoidance stress (WAS), and WAS+EA groups (n=10 per group). Bilateral ST25 and ST36 were needled in the treatment group. Primary outcomes included visceral sensitivity via abdominal withdrawal reflex testing, gut microbiota analysis through 16S rRNA sequencing, and CRF expression measured by immunofluorescence and qRT-PCR.

Results demonstrated that EA significantly alleviated visceral hypersensitivity in WAS-induced IBS mice. Treatment modulated stress-induced gut microbiota dysbiosis and suppressed overexpression of CRF in colonic tissue. The study suggests EA's therapeutic mechanism operates through the gut-brain axis, specifically via microbiome regulation and downregulation of the stress-responsive CRF pathway.

Clinical implications: ST25 and ST36 represent evidence-based point selections for stress-related IBS, targeting both local gastrointestinal function and systemic stress response. The dual mechanism—microbiome modulation and neuroendocrine regulation—supports acupuncture's role in functional gastrointestinal disorders with psychological comorbidity.