Intestinal epithelial cell - gut microbiota interface

The intestinal epithelium-gut microbiota interface is a dynamic system where specialized epithelial cells form a barrier that separates the host from luminal microbes while facilitating controlled interactions crucial for nutrient absorption, immune surveillance, and maintenance of intestinal homeostasis. Gut microbiota regulate epithelial cell function through metabolic products (SCFAs, bile acids), signaling molecules, and direct cell-cell contact, while epithelial cells secrete mucins, AMPs, and immunoglobulins (notably sIgA) to shape the microbial community and protect the host. Disruption of homeostatic interactions at this interface underlies a variety of gastrointestinal and systemic diseases, including inflammation, infections, metabolic disorders, and certain cancers. This entry is not suitable for annotation as a single canonical receptor or molecular target, but it is critically important as a functional, therapeutic, and diagnostic focus in gastrointestinal and immunological research.

Other names

Gut epithelial barrier and gut floraGut epithelial cell-microbiome interfaceIntestinal epithelial-microbial axis

Modulation of microbial composition and diversity; alteration of epithelial cell function/barrier integrity; enhancement of immune functions (e.g., increased secretion of sIgA); reduction of inflammation.