Digestive Diseases and Sciences

, Volume 52, Issue 7, pp 1642–1652

The ICE Inhibitor Pralnacasan Prevents DSS-Induced Colitis in C57BL/6 Mice and Suppresses IP-10 mRNA but Not TNF-α mRNA Expression

  • Christian Bauer
  • Florian Loher
  • Marc Dauer
  • Christine Mayer
  • Hans Anton Lehr
  • Martin Schönharting
  • Roland Hallwachs
  • Stefan Endres
  • Andreas Eigler
ORIGINAL PAPER

Abstract

Previously we demonstrated an ameliorating effect of the interleukin-1ß converting enzyme (ICE) inhibitor pralnacasan on dextran sulfate sodium (DSS)-induced colitis. This study investigates the effects of pralnacasan on cytokine expression in DSS-induced colitis. Colitis was induced by oral administration of DSS. Mice were treated intraperitoneally with the ICE inhibitor pralnacasan (50 mg/kg body weight twice daily). Body weight as well as the presence of occult blood or diarrhea was monitored daily. Subgroups were sacrificed at days 4, 8, and 11 after the beginning of DSS application. Cytokine profiles in colonic tissue were analyzed on the protein level by ELISA and on the mRNA level by real time RT-PCR. Administration of DSS led to an increase in IL-18, IL-12, TNF-α, and IFN-γ protein as well as IP-10 and TNF-α mRNA. The increase in IL-18 and IFN-γ was reduced by ICE inhibition. Pralnacasan prevented DSS-induced colitis in C57BL/6 mice. In C57BL/6 mice, the DSS-induced increase in IP-10 mRNA, but not TNF-α mRNA, was completely prevented by ICE inhibition. In conclusion, prevention of colitis in C57BL/6 mice was associated with a suppresion of IP-10 mRNA, but not TNF-α mRNA expression, indicating that IL-18-mediated cytokine production is a key element in the pathogenesis of DSS-induced colitis.

Keywords

Colitis Crohn's disease Cytokines Dextran sulfate sodium Ulcerative colitis Real-time PCR 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Christian Bauer
    • 1
    • 2
  • Florian Loher
    • 1
  • Marc Dauer
    • 2
  • Christine Mayer
    • 2
  • Hans Anton Lehr
    • 3
  • Martin Schönharting
    • 4
  • Roland Hallwachs
    • 1
  • Stefan Endres
    • 1
  • Andreas Eigler
    • 2
    • 5
  1. 1.Division of Clinical PharmacologyMedizinische Klinik Innenstadt of the University of MunichMunichGermany
  2. 2.Section of Gastroenterology, Medizinische Klinik InnenstadtUniversity of MunichMunichGermany
  3. 3.Institute of PathologyCentre Hospitalier Universitaire Vaudois (CHUV)LausanneSwitzerland
  4. 4.Sanofi-Aventis Deutschland GmbHMunichGermany
  5. 5.Medizinische Klinik InnenstadtUniversity of MunichMunichGermany

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