Intestinal epithelial cell regeneration

Intestinal epithelial cell regeneration is a dynamic and continuous process in which the intestinal epithelial lining is renewed every few days, primarily by stem cells residing at the crypt base (crypt base columnar cells, identified by Lgr5 expression)[1][2][3][5]. These stem cells proliferate, differentiate into various epithelial cell types, and migrate along the crypt-villus axis to replace aging or damaged cells. The regenerative process is critical for maintaining gut barrier function and responding to stresses such as infections, inflammation, and physical injury. Paneth cells, present in the crypts, secrete signaling molecules (e.g., WNT, EGF, Notch ligands) that maintain the stem cell niche, and can themselves dedifferentiate to aid regeneration after injury[1][3]. Multiple signaling pathways—including WNT, BMP, EGF, FGF, and TGF-β—regulate the self-renewal and differentiation of ISCs[4][5][6]. Disruption of these pathways leads to gastrointestinal diseases, and components of the regenerative process are under investigation as targets in disorders such as inflammatory bowel disease and colorectal cancer, though "intestinal epithelial cell regeneration" itself is a process, not a distinct molecular therapeutic target[4]. In summary, "intestinal epithelial cell regeneration" is a biological process mediated by stem cells and supporting molecular pathways, and not a discrete molecule or canonical druggable target.

Other names

Intestinal epithelial regenerationIntestinal epithelial renewalGut epithelial regenerationIntestinal mucosal healing