Gastrointestinal Tract and Intestinal Microbiota (GI Microbiota)

The gastrointestinal tract and its resident intestinal microbiota represent a complex symbiotic ecosystem essential for human health, comprising trillions of microorganisms including bacteria, fungi, viruses, and archaea (Thursby & Juge, 2017, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5433529/). This system performs critical biological functions such as the fermentation of non-digestible carbohydrates, synthesis of essential vitamins like K and B12, and the regulation of the mucosal immune system (Fan & Pedersen, 2021, https://www.nature.com/articles/s41579-020-0430-5). Dysbiosis, or the disruption of this microbial balance, is strongly associated with various pathologies including inflammatory bowel disease (IBD), obesity, type 2 diabetes, and Clostridioides difficile infections (Gupta et al., 2021, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8353084/). While not a single molecular target, the microbiota is a major focus of therapeutic intervention through the use of antibiotics, probiotics, prebiotics, and fecal microbiota transplantation (FMT) to restore eubiosis (Mayo Clinic, 2023, https://www.mayoclinic.org/tests-procedures/fecal-transplant/about/pac-20384710). Modern drug development also explores the gut-brain axis, targeting microbial metabolites to influence neurodegenerative and psychiatric conditions.

Other names

Gut microbiomeIntestinal floraGastrointestinal microbiomeGut microbiotaIntestinal ecosystem

Modulation of microbial composition, restoration of eubiosis, competitive exclusion of pathogens, and production of bioactive metabolites such as short-chain fatty acids.