ONX 0914 lacks selectivity for the cardiac immunoproteasome in CoxsackievirusB3 myocarditis of NMRI mice and promotes virus-mediated tissue damage
Inhibition of proteasome function by small molecules is highly efficacious in cancer treatment. Other than non-selective proteasome inhibitors, immunoproteasome-specific inhibitors allow for specific targeting of the proteasome in immune cells and the profound anti-inflammatory potential of such com...
Gespeichert in:
| Hauptverfasser: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
28 April 2020
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| In: |
Cells
Year: 2020, Jahrgang: 9, Heft: 5 |
| ISSN: | 2073-4409 |
| DOI: | 10.3390/cells9051093 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3390/cells9051093 Verlag, lizenzpflichtig, Volltext: https://www.mdpi.com/2073-4409/9/5/1093 
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| Verfasserangaben: | Hannah Louise Neumaier, Shelly Harel, Karin Klingel, Ziya Kaya, Arnd Heuser, Meike Kespohl and Antje Beling |
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| 245 | 1 | 0 | |a ONX 0914 lacks selectivity for the cardiac immunoproteasome in CoxsackievirusB3 myocarditis of NMRI mice and promotes virus-mediated tissue damage |c Hannah Louise Neumaier, Shelly Harel, Karin Klingel, Ziya Kaya, Arnd Heuser, Meike Kespohl and Antje Beling |
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| 520 | |a Inhibition of proteasome function by small molecules is highly efficacious in cancer treatment. Other than non-selective proteasome inhibitors, immunoproteasome-specific inhibitors allow for specific targeting of the proteasome in immune cells and the profound anti-inflammatory potential of such compounds revealed implications for inflammatory scenarios. For pathogen-triggered inflammation, however, the efficacy of immunoproteasome inhibitors is controversial. In this study, we investigated how ONX 0914, an immunoproteasome-selective inhibitor, influences CoxsackievirusB3 infection in NMRI mice, resulting in the development of acute and chronic myocarditis, which is accompanied by formation of the immunoproteasome in heart tissue. In groups in which ONX 0914 treatment was initiated once viral cytotoxicity had emerged in the heart, ONX 0914 had no anti-inflammatory effect in the acute or chronic stages. ONX 0914 treatment initiated prior to infection, however, increased viral cytotoxicity in cardiomyocytes, promoting infiltration of myeloid immune cells into the heart. At this stage, ONX 0914 completely inhibited the β5 subunit of the standard cardiac proteasome and less efficiently blocked its immunoproteasome counterpart LMP7. In conclusion, ONX 0914 unselectively perturbs cardiac proteasome function in viral myocarditis of NMRI mice, reduces the capacity of the host to control the viral burden and promotes cardiac inflammation. | ||
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