Gut microbiome-host interface

The **gut microbiome-host interface** refers to the dynamic, multi-species ecosystem formed by microorganisms residing in the gastrointestinal tract and their direct physical and metabolic interactions with host tissues and immune cells. This interface is not a discrete molecular target; rather, it is a complex biological environment encompassing the gut microbiota (bacteria, viruses, fungi, archaea), the intestinal epithelial barrier, immune effectors, and the metabolites exchanged between microbes and host cells[3][1][4]. The gut microbiome-host interface plays a fundamental role in digestion, host metabolism, immune development, and barrier maintenance. Alterations or disruptions of this interface (dysbiosis) are implicated in a wide spectrum of diseases including chronic inflammatory, metabolic, infectious, neuropsychiatric, and neoplastic disorders[5][2][3]. Therapeutic strategies targeting this interface often involve broad modulation—such as probiotics, prebiotics, antibiotics, or fecal microbiota transplantation—rather than selective interaction with a single molecule or receptor. Therefore, it does not correspond to a classical therapeutic "target" like an enzyme or receptor and should be considered more accurately as a complex system or environment critical to human health and disease[1][3][6].

Other names

Gut microbiome and host-microbe interfaceGut microbiota-host interfaceMicrobiome-host interface

Modulation of immune response (e.g., induction of tolerogenic or inflammatory pathways); Production of metabolites affecting host cells (e.g., short-chain fatty acids); Competitive exclusion and inhibition of pathogens; Alteration of host signaling pathways and barrier function