Gut Microbiota and Gastrointestinal Mucosa

The gut microbiota and gastrointestinal mucosa constitute a complex symbiotic ecosystem essential for human physiology and immune homeostasis (NIH, 2023). The gut microbiota, comprising trillions of bacteria, fungi, and viruses, performs critical metabolic functions such as the fermentation of non-digestible carbohydrates into short-chain fatty acids and the synthesis of essential vitamins (Nature Reviews Microbiology, 2019). Simultaneously, the gastrointestinal mucosa acts as a selective semi-permeable barrier, facilitated by tight junction proteins and a protective mucus layer, which prevents the translocation of luminal pathogens and toxins into the systemic circulation (StatPearls, 2023). Dysregulation of this interface, characterized by microbial dysbiosis and increased mucosal permeability, is a central driver in the pathogenesis of inflammatory bowel diseases, metabolic syndrome, and certain autoimmune conditions (PubMed, 2021). Therapeutic interventions targeting this system range from broad-spectrum and non-absorbable antibiotics like rifaximin to the administration of live biotherapeutic products and fecal microbiota transplantation to restore ecological balance (Journal of Clinical Medicine, 2022). Additionally, mucosal protectants and integrin antagonists are employed to reinforce barrier function and modulate local immune cell trafficking, highlighting the system's role as a multifaceted therapeutic target (Gastroenterology, 2020).

Other names

Gut microbiomeIntestinal floraGastric mucosaIntestinal barrierGut-mucosal interface

Modulation of microbial composition, restoration of epithelial barrier integrity, and regulation of mucosal immune homeostasis.