Epithelial cell junction

Epithelial cell junctions are specialized protein complexes that provide structural integrity and regulate communication between adjacent epithelial cells (StatPearls, 2023). They consist of four primary types: tight junctions, adherens junctions, desmosomes, and gap junctions, which collectively maintain the epithelial barrier and regulate paracellular transport (Nature Reviews Molecular Cell Biology, 2014). These junctions are critical for maintaining cell polarity and tissue homeostasis, and their disruption is a key feature in various pathologies, including cancer metastasis and inflammatory diseases (Journal of Cell Science, 2017). In oncology, specific components like Claudin 18.2 are targeted by monoclonal antibodies such as Zolbetuximab to treat gastric and gastroesophageal cancers (The Lancet Oncology, 2021). Additionally, therapeutic agents like Larazotide aim to regulate tight junction permeability to treat autoimmune conditions such as celiac disease (American Journal of Gastroenterology, 2015). Understanding the molecular composition and regulation of these junctions is essential for developing strategies to enhance drug delivery or restore barrier function in chronic inflammatory states.

Other names

Intercellular junctionCell-cell junctionJunctional complex

Modulation of paracellular permeability, Targeted cytotoxicity, Restoration of barrier function