Intestinal epithelial cell surface receptors and pattern recognition receptors and associated signaling complexes (IEC-PRR complexes)

Intestinal epithelial cell surface receptors and pattern recognition receptors (PRRs) represent a broad class of sensors that detect pathogen-associated molecular patterns (PAMPs) and damage-associated molecular patterns (DAMPs) to maintain gut homeostasis (Nature Reviews Gastroenterology & Hepatology, 2013, PMID: 24072361). These include Toll-like receptors (TLRs), NOD-like receptors (NLRs), and C-type lectin receptors (CLRs), which are expressed on or within intestinal epithelial cells and underlying immune cells (Journal of Clinical Investigation, 2017, PMID: 28844788). Upon ligand binding, these receptors assemble into complex signaling scaffolds, such as the Myddosome or inflammasome, to trigger downstream cascades involving Janus kinases (JAKs) and NF-kappaB (Cell, 2018, PMID: 29385115). Dysregulation of these pathways is central to the pathogenesis of inflammatory bowel diseases (IBD), where chronic inflammation leads to mucosal damage (The Lancet, 2017, PMID: 29132860). Therapeutic intervention typically involves targeting specific components of these complexes, such as JAK inhibitors or TLR modulators, to dampen the inflammatory response (Gastroenterology, 2019, PMID: 30545565). However, because these receptors are essential for host defense, their inhibition carries risks of infection and altered tissue repair (Nature Reviews Drug Discovery, 2012, PMID: 22460122).

Other names

Intestinal pattern recognition receptorsGut epithelial innate immune sensorsIntestinal PRR signaling complexesEpithelial innate immune receptors

Modulation of innate immune signaling pathways through the inhibition of downstream kinases (e.g., JAKs) or the antagonism/agonism of specific pattern recognition receptors (e.g., TLRs).