Acupuncture and moxibustion in irritable bowel syndrome: a mechanistic exploration from heart rate variability to cardiac metabolism.

Irritable bowel syndrome (IBS) doesn't just affect the digestive system—it can also impact heart function through changes in heart rate variability. Researchers in China investigated whether acupuncture combined with moxibustion could improve both IBS symptoms and heart health in rats, and whether the choice of acupuncture points mattered. They compared two treatment approaches: a "root and branch" protocol using the points Neiguan (PC6), Guanyuan (CV4), and Zusanli (ST36), versus a conventional protocol using Tianshu (ST25), Zusanli (ST36), and Shangjuxu (ST37). The study found that both acupuncture protocols reduced visceral pain in the IBS rats. However, the "root and branch" protocol was more effective at improving heart rate variability and regulating important heart hormones called ANP and BNP. This protocol also helped normalize disrupted energy metabolism in heart tissue and reduced inflammation-related changes in how the body processes tryptophan, an important amino acid. These findings suggest that acupuncture and moxibustion may help IBS patients not only by reducing abdominal pain, but also by improving autonomic nervous system regulation and heart function. The specific combination of acupuncture points appears to matter, with the "root and branch" approach showing broader therapeutic effects on both digestive and cardiac health. If you're considering acupuncture for IBS, seek treatment from a licensed acupuncturist trained in traditional Chinese medicine principles.

This study compared two acupoint protocols for acupuncture-moxibustion treatment in a chronic and acute stress-induced IBS rat model. The biao-ben (BB) protocol utilized PC6, CV4, and ST36, while the conventional group (CG) employed ST25, ST36, and ST37. Both protocols significantly improved visceral pain thresholds measured by abdominal withdrawal reflexes. The BB protocol demonstrated superior efficacy in modulating HRV parameters and regulating serum and cardiac tissue levels of ANP and BNP. Widely-targeted metabolomic analysis revealed the BB group downregulated elevated cardiac metabolites including adenosine diphosphate, kynurenine, and kynurenic acid, suggesting restoration of cardiac energy metabolism and amelioration of inflammation-driven tryptophan metabolism aberrations. Clinical implications indicate that acupoint selection based on TCM principles of treating both root and manifestation may offer enhanced autonomic regulation and cardioprotective effects beyond conventional symptomatic point selection in IBS management.