Host gut mucosa, immune cells, and resident microbiota

The host gut mucosa, immune cells, and resident microbiota represent a multi-component biological system known as the gut-immune-microbiota axis, which is essential for maintaining human health and homeostasis (Belkaid & Hand, 2014, Science). The gut mucosa acts as a selective physical and chemical barrier, while the resident microbiota contributes to metabolic processes and the development of the host immune system (Thursby & Juge, 2017, Biochem J). Within this environment, specialized immune cells, such as intraepithelial lymphocytes and Peyer's patch cells, engage in constant cross-talk with microbial signals to distinguish between commensal organisms and pathogens (Hooper et al., 2012, Science). Disruptions in this delicate balance, often termed dysbiosis or barrier dysfunction, are linked to the pathogenesis of inflammatory bowel disease (IBD), metabolic disorders, and systemic autoimmunity (Ni et al., 2017, Nat Rev Gastroenterol Hepatol). Therapeutic strategies targeting this system include the use of probiotics to restore microbial balance, biologics like Vedolizumab to prevent pathological immune cell trafficking, and fecal microbiota transplantation to reset the entire ecosystem (Vancamelbeke & Vermeire, 2017, Ther Adv Gastroenterol).

Other names

Gut-immune-microbiota axisIntestinal mucosal barrier systemGut microbiome-immune interfaceGastrointestinal mucosal ecosystem

Modulation of microbial composition, enhancement of epithelial barrier integrity, and regulation of mucosal immune cell recruitment and activation.