Inhibition of the Immunoproteasome Subunit LMP7 with ONX 0914 Ameliorates Graft-versus-Host Disease in an MHC-Matched Minor Histocompatibility Antigen–Disparate Murine Model
| Autor: | Zheng Yang, Jenny Zilberberg, Eugenia Dziopa, Christopher J. Kirk, Robert Korngold, Shahin Assefnia, Leah Dziopa, Jennifer Matos |
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| Rok vydání: | 2015 |
| Předmět: |
Proteasome Endopeptidase Complex
T-Lymphocytes Lymphocyte Encephalomyelitis medicine.medical_treatment GVHD Graft vs Host Disease Mice Transgenic chemical and pharmacologic phenomena Context (language use) Murine models Major histocompatibility complex Immunoproteasome Minor Histocompatibility Antigens Interferon-gamma Mice MHC class I medicine Minor histocompatibility antigen Animals Bone Marrow Transplantation Transplantation biology BMT business.industry Hematology Allografts medicine.disease medicine.anatomical_structure Graft-versus-host disease Cytokine Immunology biology.protein business Oligopeptides |
| Zdroj: | Biology of Blood and Marrow Transplantation. 21:1555-1564 |
| ISSN: | 1083-8791 |
| DOI: | 10.1016/j.bbmt.2015.06.010 |
| Popis: | In the current study we evaluated the effects of immunoproteasome inhibition using ONX 0914 (formerly PR-957) to ameliorate graft-versus-host disease (GVHD). ONX 0914, an LMP7-selective epoxyketone inhibitor of the immunoproteasome, has been shown to reduce cytokine production in activated monocytes and T cells and attenuate disease progression in mouse models of rheumatoid arthritis, colitis, systemic lupus erythematosus, and, more recently, encephalomyelitis. Inhibition of LMP7 with ONX 0914 in the B10.BR→CBA MHC-matched/minor histocompatibility antigen (miHA)-disparate murine blood and marrow transplant (BMT) model caused a modest but significant improvement in the survival of mice experiencing GVHD. Concomitant with these results, in vitro mixed lymphocyte cultures revealed that stimulator splenocytes, but not responder T cells, treated with ONX 0914 resulted in decreased IFN-γ production by allogeneic T cells in both MHC-disparate (B10.BR anti-B6) and miHA-mismatched (B10.BR anti-CBA) settings. In addition, a reduction in the expression of the MHC class I–restricted SIINFEKL peptide was observed in splenocytes from transgenic C57BL/6-Tg(CAG-OVA)916Jen/J mice exposed to ONX 0914. Taken together, these data support that LMP7 inhibition in the context of BMT modulates allogeneic responses by decreasing endogenous miHA presentation and that the consequential reduction in allogeneic stimulation and cytokine production reduces GVHD development. |
| Databáze: | OpenAIRE |
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