1. Dexamethasone suppresses interleukin-22 associated with bacterial infection in vitro and in vivo.
- Author
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Ziesché, E., Scheiermann, P., Bachmann, M., Sadik, C. D., Hofstetter, C., Zwissler, B., Pfeilschifter, J., and Mühl, H.
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DEXAMETHASONE , *INTERLEUKINS , *BACTERIAL diseases , *PHYSIOLOGICAL control systems , *NATURAL immunity , *CROHN'S disease , *ADRENOCORTICAL hormones - Abstract
Interleukin (IL)-22 production triggered by innate immune mechanisms has been identified as key to efficient intestinal anti-bacterial host defence and preservation of homeostasis. We hypothesized that glucocorticoid therapy may impair IL-22 expression, which should promote intestinal epithelial damage with the potential of subsequent bacterial translocation. High-dose corticosteroid therapy in Crohn's disease has been associated with an increased rate of abscess formation and ultimately with a higher risk of developing postoperative infectious complications, including abdominal sepsis. Thus, we sought to investigate effects of the prototypic glucocorticoid dexamethasone on IL-22 production in the context of bacterial infection. Enhanced IL-22 plasma levels were detectable in rat sepsis. Moreover, heat-inactivated Staphylococcus epidermidis, used as a prototypic activator of innate immunity, induced robust production of IL-22 by human peripheral blood mononuclear cells (PBMC). Here, we report for the first time that dexamethasone mediates remarkable suppression of IL-22 as detected in S. epidermidis-activated PBMC and rat sepsis, respectively. The data presented herein suggest that insufficient IL-22 function may contribute to impaired intestinal host defence in the context of corticosteroid therapy. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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