Host gut mucosa and microbiota

The host gut mucosa and microbiota represent a complex symbiotic ecosystem consisting of the intestinal epithelial lining, the overlying mucus layer, and trillions of microorganisms including bacteria, fungi, and viruses (Thursby & Juge, 2017, PMID: 28539185). This system plays a critical role in human health by facilitating nutrient absorption, synthesizing essential vitamins like K and B12, and training the host immune system to distinguish between commensal organisms and pathogens (NIH, 2023). The gut microbiota also produces metabolic byproducts, such as short-chain fatty acids (SCFAs), which maintain the integrity of the intestinal barrier and influence systemic physiology through the gut-brain and gut-liver axes (Fan & Pedersen, 2021, PMID: 33199854). Dysregulation of this environment, known as dysbiosis, is linked to numerous conditions including inflammatory bowel disease (IBD), metabolic syndrome, and Clostridioides difficile infection (CDI) (CDC, 2022). Therapeutic interventions, such as probiotics, prebiotics, and fecal microbiota transplantation (FMT), aim to restore a healthy microbial balance or enhance the protective functions of the mucosal barrier (FDA, 2022). While targeting this system offers significant therapeutic potential, challenges include the high variability of microbial composition between individuals and the risk of systemic infection in immunocompromised patients (Gupta et al., 2016, PMID: 27107786).

Other names

Gut microbiomeIntestinal microbiotaGut floraGastrointestinal mucosaIntestinal barrierGut-brain axis

Modulation of microbial composition, restoration of intestinal barrier integrity, competitive inhibition of pathogens, and regulation of mucosal immune cell trafficking.