溃疡性结肠炎与肠道菌群的研究进展

Relationship between colonic inner mucus layer and pathogenesis of ulcerative colitis

There is a mucus layer on the surface of the gastrointestinal tract, which is composed of two mucus layers with different structures and properties. The inner mucus layer is built by a network formed by the MUC2. Recent research on the colonic mucus layer indicates that the colon is protected by the normal inner mucus layer so that the commensal bacteria can live in friendly coexistence with the host. The damage to the inner mucus layer can cause its abnormal function, which may explain the pathogenesis of ulcerative colitis.

Advances in research of metavirus in inflammatory bowel disease

Inflammatory bowel disease (IBD) is a chronic relapsing disease of the gastrointestinal tract. Ulcerative colitis and Crohn's disease are two main forms. With the development of metavirus technique in recent years, the latest research shows that virus is the second largest species in the intestine. The enteric virome may have a direct effect on the intestinal immunological functions, and the intestinal bacteriophages can affect the human gut bacteria and change the enteric internal environment. Therefore, the research focused on the enteric virome may help clarify the aetiological causes of IBD. In this review, we discuss the relationships between intestinal virus, intestinal flora, and the pathogenesis of IBD.