Interleukin-23/Th17 pathways and inflammatory bowel disease

Clara Abraham, Judy Cho

Research output: Contribution to journalReview articlepeer-review

252 Scopus citations


The IL-23/Th17 pathway has recently been identified to play a critical role in a number of chronic inflammatory diseases including inflammatory bowel disease (IBD). The identification in IBD patients of associations in IL23R and regions that include other genes in the IL-23/Th17 pathway has highlighted the importance of proper IL-23/Th17 pathway regulation in intestinal immune homeostasis. IL-23 plays a role in CD4+ Th17 lineage cells, characterized by IL-17 secretion and the expression of the transcription factor retinoic acid-related orphan receptor (ROR)γr, and in other immune and nonimmune cells. The balance between effector T cell subsets, such as Th17 cells, and CD4+ T regulatory subsets is finely regulated; dysregulation of this balance can lead to inflammation and autoimmunity. As such, the IL-23/Th17 pathway contributes to immune responses that play a role in defenses to microbial infection, as well as in the intestinal inflammation observed in both animal models of colitis and human IBD.

Original languageEnglish
Pages (from-to)1090-1100
Number of pages11
JournalInflammatory Bowel Diseases
Issue number7
StatePublished - 2009
Externally publishedYes


  • Autoimmunity
  • IL-23
  • Inflammation
  • Inflammatory bowel disease
  • Th17 cells


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