Pouchitis is associated with mucosal imbalance between interleukin-8 and interleukin-10

Philippe Bulois, William J. Tremaine, Vincent Maunoury, Luc Gambiez, Samira Hafraoui, Emmanuelle Leteurtre, Antoine Cortot, William J. Sandborn, Jean Frédéric Colombel, Pierre Desreumaux

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51 Scopus citations


Background: Mucosal lesions of pouchitis are characterized by a neutrophil infiltrate. Interleukin (IL)-8 is the main mediator involved in neutrophil recruitment and is down-regulated by IL-10. Aim: To look for an imbalance between IL-8 and IL-10 in patients with pouchitis. Patients/Methods: 18 patients having an ileoanal pouch for ulcerative colitis were studied. Eleven had pouchitis defined by the pouchitis disease activity index of ≥7 points and 7 had no history of pouchitis. Biopsies taken at the site of inflammation or in the normal mucosa were scored for the histologic lesions, the intensity of neutrophil infiltration, and the presence of crypt abscesses. Mucosal IL-8 and IL-10 mRNA were quantified by competitive polymerase chain reaction. Results: IL-8, IL-10, and IL-10/IL-8 mRNA were similar in patients with or without pouchitis. IL-8 mRNA levels were significantly higher in patients with a histologic score >2 (p = 0.01) and in patients with crypt abscesses (p = 0.01). IL-10/IL-8 mRNA was significantly lower in patients having a histologic score >2 (p = 0.019), a neutrophil infiltration ≥10%(p = 0.013), and crypt abscesses (p = 0.01). Conclusion: Histologic lesions of pouchitis are associated with a mucosal imbalance between IL-8 and IL-10. IL-10 could be proposed as a new treatment for pouchitis.

Original languageEnglish
Pages (from-to)157-164
Number of pages8
JournalInflammatory Bowel Diseases
Issue number3
StatePublished - 2000
Externally publishedYes


  • Interleukin-10
  • Interleukin-8
  • Pouchitis
  • Ulcerative colitis


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