Human intestinal enterocyte (IEC)

Human intestinal enterocytes are the predominant columnar epithelial cells lining the inner surface of the small and large intestines (StatPearls, 2023). Their primary biological role is the selective absorption of nutrients, water, and electrolytes from the intestinal lumen into the bloodstream, facilitated by a specialized brush border membrane rich in microvilli (NIH, 2022). Beyond absorption, enterocytes serve as a critical physical and immunological barrier, preventing the translocation of commensal bacteria and pathogens into systemic circulation (Nature Reviews, 2020). In various pathologies, such as Celiac disease or Crohn's disease, enterocyte damage leads to impaired barrier integrity and malabsorption (PubMed, 2021). While the enterocyte itself is a cell type rather than a single molecular target, it expresses a multitude of clinically relevant proteins, including transporters like NPC1L1 and enzymes like CYP3A4, which are central to drug absorption and first-pass metabolism (PubChem, 2024).

Other names

Absorptive cellIntestinal epithelial cellIntestinal absorptive cellGut epithelial cell

Drugs modulate enterocyte function by targeting specific membrane proteins, such as inhibiting the NPC1L1 transporter to reduce cholesterol absorption or activating GC-C receptors to increase fluid secretion (PubChem, 2024; StatPearls, 2023).