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| Status |
Public on Jul 07, 2010 |
| Title |
Subunit-specific vs. non-selective proteasome modulation in limiting inflammation in experimental colitis |
| Organism |
Mus musculus |
| Experiment type |
Expression profiling by array
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| Summary |
Inflammatory bowel disease (IBD), comprising Crohn´s disease and Ulcerative colitis, is characterized by chronic relapsing inflammation of the gut. It has been shown that increased proteasomal activity is associated with the expression of immunoproteasomes, which enhances NF-kB activation and thus promotes inflammation in IBD-patients. Here, we investigate whether modulation of the proteasomal activity is a suitable therapeutic approach to limit inflammation in colitis. This concept was tested in two different experimental setups. First, development of dextran sulfate sodium (DSS)-induced colitis was tested in lmp7-/--mice, which lack the essential immunoproteasome-subunit LMP7 or in wildtype-mice treated with the proteasome inhibitor bortezomib. Compared to WT mice, lmp7-/- mice revealed significantly attenuated colitis resulting from reduced NF-kB activation in the absence of LMP7. Further, treatment with bortezomib revealed dose-dependent amelioration of DSS-induced inflammation. In both approaches proteasome modulation limited the infiltration of neutrophils, consequently reducing tissue damage. In summary our experiments demonstrate that modulation of the proteasomal activity is effective in attenuating experimental colitis. In particular, our data suggest that the immunoproteasome-subunit LMP7 is a suitable target for the therapy of IBD.
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| Overall design |
Microarray experiments were performed as dual-color hybridizations. To compensate for dye-specific effects, a dye-reversal color-swap was applied. Samples of proximal colon were cut longitudinally, washed in PBS, shortly incubated in 4M Guanidinium-isothiocyanat and transferred to TRIzol (Invitrogen).
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| Contributor(s) |
Schmidt N, Molenkopf H, Kaufmann S, Steinhoff U, Joeris T |
| Citation(s) |
20581238 |
| Submission date |
Sep 18, 2009 |
| Last update date |
Dec 06, 2012 |
| Contact name |
Hans-Joachim Mollenkopf |
| E-mail(s) |
mollenkopf@mpiib-berlin.mpg.de
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| Phone |
+49 30 28460 482
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| Organization name |
Max-Planck-Institute for Infection Biology
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| Lab |
Microarray/Genomics Core Facility
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| Street address |
Charitéplatz 1
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| City |
Berlin |
| ZIP/Postal code |
10117 |
| Country |
Germany |
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| Platforms (1) |
| GPL2872 |
Agilent-012694 Whole Mouse Genome G4122A (Feature Number version) |
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| Samples (8)
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| Relations |
| BioProject |
PRJNA119469 |
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