Gastrointestinal contents and gut microbiota (GM)

The gastrointestinal contents and gut microbiota constitute a vast and complex ecosystem of trillions of microorganisms, primarily bacteria, that reside in the human digestive tract and perform essential metabolic and immunological functions (NIH, 2023). This community is responsible for the fermentation of non-digestible dietary fibers into short-chain fatty acids (SCFAs), the synthesis of essential vitamins such as K and B12, and the maturation and regulation of the host immune system (Nature Reviews Microbiology, 2022). Alterations in the composition and diversity of the microbiota, a state known as dysbiosis, are strongly associated with a wide range of pathologies, including Clostridioides difficile infection, inflammatory bowel disease (IBD), and metabolic disorders (PubMed, 2021). Therapeutic strategies targeting this system include the use of non-systemic antibiotics like Rifaximin, probiotics to replenish beneficial taxa, and fecal microbiota transplantation (FMT) to restore ecological balance (Gastroenterology, 2020). Unlike traditional molecular targets such as single receptors or enzymes, the gut microbiota represents a multi-organismal target where the therapeutic goal is often the modulation of community dynamics and metabolic output rather than the inhibition of a specific host protein.

Other names

Gut microbiomeIntestinal floraGastrointestinal microbiomeGut floraIntestinal microbiota

Modulation of the microbial community structure, restoration of commensal bacteria to provide competitive exclusion of pathogens, and production of bioactive metabolites such as short-chain fatty acids (SCFAs) that maintain epithelial integrity.