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Erschienen in: Digestive Diseases and Sciences 7/2012

01.07.2012 | Original Article

Inhibition of Pim-1 Kinase Ameliorates Dextran Sodium Sulfate-Induced Colitis in Mice

verfasst von: Yue-Ming Shen, Yan Zhao, Ya Zeng, Lu Yan, Bo-Lin Chen, Ai-Min Leng, Yi-Bin Mu, Gui-Ying Zhang

Erschienen in: Digestive Diseases and Sciences | Ausgabe 7/2012

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Abstract

Background

Pim-1 kinase is involved in the control of cell growth, differentiation and apoptosis. Recent evidence suggests that Pim kinases play a role in immune regulation and inflammation. However, the role of Pim-1 kinase in inflammatory bowel diseases (IBD) remains unclear.

Aims

The aims of this study were to explore the role of Pim-1 kinase in the pathology of IBD and to assess whether inhibiting Pim-1 kinase may be of therapeutic benefit as a treatment regimen for IBD.

Methods

Colitic mouse model was established by the induction of dextran sodium sulfate. The expression of Pim-1 in the colonic samples of control and colitic mice was examined. Furthermore, the mice were treated with Pim-1inhibitor (PIM-Inh), then the body weight and colon inflammation were evaluated, and the production of cytokines including IFN-γ, IL-4, TGF-β and IL-17 in colon tissues was determined by ELISA. The expression of T cell master transcription factors T-bet, ROR-γt, GATA-3 and Foxp3 and Nuclear factor κB (NF-κB) and inducible nitric oxide synthase in colon tissues was detected by real-time PCR and western blot. Finally, the effect of LPS on Pim-1 expression and the effects of PIM-Inh on LPS-induced upregualtion of p65 and TNF-α in RAW264.7 cells were examined by real-time PCR and western blot.

Results

Pim-1 expression was correlated with the degree of mucosal inflammation in vivo, and it was significantly induced by LPS in vitro. PIM-Inh had protective effects on acute colitis in vivo. Mechanistically, PIM-Inh reduced the proinflammatory immune response through the inhibition of the overactivation of macrophages and the down-regulation of excessive Th1- and Th17-type immune responses. Furthermore, PIM-Inh could skew T cell differentiation towards a Treg phenotype.

Conclusions

Pim-1 kinase is involved in mucosal injury/inflammation and Pim-1 kinase inhibitor may provide a novel therapeutic approach for IBD.
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Metadaten
Titel
Inhibition of Pim-1 Kinase Ameliorates Dextran Sodium Sulfate-Induced Colitis in Mice
verfasst von
Yue-Ming Shen
Yan Zhao
Ya Zeng
Lu Yan
Bo-Lin Chen
Ai-Min Leng
Yi-Bin Mu
Gui-Ying Zhang
Publikationsdatum
01.07.2012
Verlag
Springer US
Erschienen in
Digestive Diseases and Sciences / Ausgabe 7/2012
Print ISSN: 0163-2116
Elektronische ISSN: 1573-2568
DOI
https://doi.org/10.1007/s10620-012-2106-7

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