Gastrointestinal microbiota–host cell adhesion interface

The gastrointestinal microbiota–host cell adhesion interface is formed by interactions between commensal and pathogenic bacteria and the surface molecules (mucins, collagens, immune factors) of host intestinal epithelial cells. This dynamic barrier controls colonization, immune tolerance, and exclusion of pathogens. Bacteria adhere to host cells via specialized adhesins—such as mucus-binding proteins and pili—which interact with mucins and other matrix proteins. Host cells regulate bacterial colonization by modifying glycosylation patterns in mucins and can respond through immune mechanisms involving secretory IgA, antimicrobial peptides, and cytokines. The integrity of this interface is crucial for maintaining gut homeostasis; its disruption is implicated in infectious, inflammatory, and metabolic diseases[1][2][3][4][5][6]. Note: This entry represents a biological concept rather than a discrete molecular target. For analytical, therapeutic, or bioinformatic use, it would be necessary to specify individual adhesion molecules (e.g., “Mucin MUC2” or “Collagen XV”) or microbial surface adhesins (e.g., “Mucus-binding protein Mub”) rather than use this broad interface term.

Other names

Gut microbiota–mucosal interfaceIntestinal microbiota–host adhesionMicrobial colonization sites

Modulation of microbial adhesion to host cells (by altering mucus composition or epithelial cell surface molecules); Changes in microbiota via competitive inhibition or enhancement of colonization resistance; Strengthening or weakening barrier function, thus influencing infection susceptibility