Host gut environment and microbiota (Gut microbiome)

The host gut environment and microbiota represent a complex symbiotic ecosystem comprising trillions of microorganisms, including bacteria, fungi, viruses, and archaea, residing within the gastrointestinal tract (NIH, 2023). This virtual organ plays a critical role in human health by facilitating the digestion of complex carbohydrates, synthesizing essential vitamins like K and B12, and training the host immune system to distinguish between commensal organisms and pathogens (Guinane & Cotter, 2013). Dysbiosis, or a functional imbalance in this microbial community, is strongly linked to a wide range of pathologies, including gastrointestinal disorders like Inflammatory Bowel Disease (IBD) and Clostridioides difficile infection (CDI), as well as systemic conditions such as obesity and metabolic syndrome (Fan & Pedersen, 2021). Therapeutic intervention strategies include the use of antibiotics to eliminate pathogens, probiotics and prebiotics to promote beneficial taxa, and fecal microbiota transplantation (FMT) or defined microbial consortia to restore ecological balance (FDA, 2023). As a therapeutic target, the gut microbiota offers a unique opportunity for precision medicine through the modulation of microbial metabolites and the restoration of functional diversity.

Other names

Gut microbiotaIntestinal floraGastrointestinal microbiomeGut flora

Modulation of the microbial ecosystem to restore taxonomic diversity and functional metabolic pathways, primarily through competitive exclusion of pathogens and the production of anti-inflammatory metabolites such as short-chain fatty acids (SCFAs) (NIH, 2023; FDA, 2023).