Host intestinal microbiota and mucosal environment

The host intestinal microbiota and mucosal environment constitute a complex, multi-kingdom ecosystem residing within the gastrointestinal tract, consisting of bacteria, archaea, fungi, and viruses, alongside the host's protective mucus and epithelial layers (Nature Reviews Microbiology, 2020). This system is vital for human health, performing functions such as the fermentation of non-digestible carbohydrates into short-chain fatty acids, synthesis of vitamins K and B12, and the regulation of systemic immunity (NIH, 2023). Dysbiosis, or the disruption of this ecological balance, is a primary driver of Clostridioides difficile infection and is strongly associated with chronic conditions like inflammatory bowel disease (IBD) and obesity (Science, 2021). Therapeutic strategies targeting this environment include fecal microbiota transplantation (FMT) and live biotherapeutic products like Rebyota and Vowst, which aim to restore a healthy microbial community and reinforce the mucosal barrier (FDA, 2023). By modulating the gut-brain and gut-immune axes, these therapies represent a paradigm shift toward ecosystem-level medical interventions.

Other names

Gut microbiotaIntestinal microbiomeGastrointestinal floraMucosal nicheGut-mucosal barrier

Restoration of microbial diversity and ecological balance, competitive exclusion of pathogens, and modulation of host-microbe metabolic signaling such as short-chain fatty acid production.