Abstract / Summary
Background: Crohn's disease (CD) is a multifactorial inflammatory bowel disease (IBD) characterized by impaired epithelial barrier integrity, excessive immune hyperactivation, and gut microbiota perturbations. Cumulative evidence supports the role of the intestinal epithelial barrier, immune system and gut microbiota in the progression of CD.
Objective: This review constructs a mechanistic framework of the epithelial-immune-microbiota tripartite network in CD with a focus on positive‑feedback circuits sustaining persistent intestinal inflammation.
Key findings: Interrelated pathological loops involving barrier injury, immune activation and microbial dysbiosis perpetuate chronic intestinal inflammation and provide a rationale for mechanism‑guided combinatorial therapeutic interventions.
Conclusions: This framework illuminates key pathogenic crosstalk that may be targeted to optimize future treatment regimens for CD.