[Effect of acupuncture therapy on gut microbiota and fecal short-chain fatty acids in patients with diarrhea type irritable bowel syndrome].

OBJECTIVE

To observe the clinical therapeutic effect of acupuncture therapy (acupuncture for regulating the mind and strengthening the spleen) on the gut microbiota and the content of fecal short-chain fatty acids (SCFAs) in patients with diarrhea type irritable bowel syndrome (IBS-D).

METHODS

A total of 20 patients with IBS-D and 20 healthy subjects were included. The patients with IBS-D were treated with acupuncture therapy at Baihui (GV 20), Yintang (GV 29), Tianshu (ST 25), Shangjuxu (ST 37), Zusanli (ST 36), Sanyinjiao (SP 6) and Taichong (LR 3). The treatment was given once every two days, 3 times weekly, consecutively for 6 weeks. No intervention was provided for the healthy subjects. Before and after treatment, the IBS symptom severity score (IBS-SSS) was observed in the patients. The fecal samples were collected before and after treatment separately in the patients and in the healthy subjects. Using 16S rRNA sequencing technique, the structure and diversity of gut microbiota were analyzed. Using high-performance liquid chromatography, the content of SCFAs was detected.

RESULTS

After treatment, the abdominal pain severity score, the abdominal pain days score, the satisfaction in bowel movement score, the life interference score and the total IBS-SSS score were all lower than those before treatment in the patients with IBS-D (<0.05). Compared with the healthy subjects, Firmicutes was increased (<0.05), Bacteroidetes and Proteobacteria were decreased (<0.05), and Shannon index was reduced (<0.05) and Simpson index was increased in patients with IBS-D before treatment (<0.05). Compared before treatment, Firmicutes was decreased (<0.05), Bacteroidetes and Proteobacteria were increased (<0.05), and Shannon index was increased (<0.05) and Simpson index was reduced in the patients with IBS-D after treatment (<0.05). Besides, the content of SCFAs was reduced after treatment (<0.05).

CONCLUSION

acupuncture therapy relieves abdominal pain and diarrhea, which may be related to regulating the structure and diversity of gut microbiota and reducing the content of fecal SCFAs in the patients with IBS-D.