Effects ofLactobacillus gasseriOLL2716 onHelicobacter pylori-Associated Dyspepsia: A Multicenter Randomized Double-Blind Controlled Trial
SomeLactobacillusspp. suppressHelicobacter pyloriin the stomach and have potential therapeutic applications for the treatment of gastrointestinal conditions. In this study, the effects ofLactobacillusstrains on functional dyspepsia associated withH. pyloriinfection were examined. Volunteers were screened using the13C-urea breath test (UBT) andH. pyloristool test, and 131 participants who met the selection criteria (mean age: 48.9 years) were randomly givenL. gasseriOLL2716-containing yogurt or placebo yogurt once daily for 12 weeks. Gastrointestinal symptoms (epigastric pain, bloating, postprandial fullness, nausea, and heartburn) and the levels of serum pepsinogen (PG),13C-UBT, andH. pyloristool antigen were assessed. No significant differences were observed between the groups in UBT results,H. pyloristool antigens, or the serum PGI/II ratio. In theL. gasserigroup, postprandial fullness was significantly lower at the end of the trial compared to the initial level (p<0.05) and significantly fewer patients had a VAS score of >10 for bloating compared to the placebo group (p<0.05). Dietary supplementation withL. gasseriOLL2716-containing yogurt may effectively suppress dyspeptic symptoms inH. pylori-infected patients. This study was registered at the University Hospital Medical Network Clinical Trial Registry (UMIN000016746).