Progress in elucidating the relationship between Helicobacter pylori infection and intestinal diseases

• Published in: World journal of gastroenterology : WJG 2021-12, Vol.27 (47), p.8040-8046
• Main Author: Fujimori, Shunji
• Format: Article
• Language: English
• Subjects: Crohn Disease; Gastrins; Gastritis, Atrophic; Helicobacter Infections - complications; Helicobacter pylori; Humans
• ISSN: 1007-9327; 2219-2840
• DOI: 10.3748/wjg.v27.i47.8040

( ) infection causes changes to the intestinal flora, such as small intestinal bacterial overgrowth, and increases gastric acid secretion-stimulating gastrointestinal hormones, mainly gastrin, due to a decrease in gastric acid caused by atrophic gastritis. In addition, the cellular components of travel through the intestinal tract, so the bacterial infection affects the immune system. Therefore, the effects of infection are observed not only in the stomach and the proximal duodenum but also in the small and large intestines. In particular, meta-analyses reported that -infected individuals had an increased risk of colorectal adenoma and colorectal cancer. Moreover, a recent study reported that the risk of developing colorectal cancer was increased in subjects carrying vacuolating cytotoxin A antibody. In addition, it has been reported that infection exacerbates the symptoms of Fabry's disease and familial Mediterranean fever attack and is involved in irritable bowel syndrome and small intestinal ulcers. On the other hand, some studies have reported that the frequency of ulcerative colitis, Crohn's disease, and celiac disease is low in -infected individuals. Thus, infection is considered to have various effects on the small and large intestines. However, few studies have reported on these issues, and the details of their effects have not been well elucidated. Therefore, additional studies are needed.