Shelf life (days): 1460.0
Formulation: A crystalline solid
Formal Name: N-[2-(4-morpholinyl)acetyl]-L-alanyl-O-methyl-N-[(1S)-2-[(2R)-2-methyl-2-oxiranyl]-2-oxo-1-(phenylmethyl)ethyl]-L-tyrosinamide
Purity: ≥98%
Formula Markup: C31H40N4O7
Formula Weight: 580.7
CAS Number: 960374-59-8
Notes: The immunoproteasome is a specialized, inducible proteasome that generates peptides presented on major histocompatibility complex (MHC) class I molecules to cytotoxic T cells. Stimulation of cells with inflammatory cytokines such as IFN-γ leads to the replacement of constitutive catalytic proteasome β subunits with inducible β subunits (β1i (LMP2), β2i (MECL1), and β5i (LMP7)), which are required for the production of certain MHC class I-restricted T cell epitopes. ONX 0914 is a selective inhibitor of the β5i (LMP7) subunit of the immunoproteasome (IC50s = 65 and 73 nM for mouse and human, respectively) and demonstrates significantly weaker activity at the β5 subunit of the constitutive proteasome (IC50s = 0.92 and 1.04 µM for mouse and human, respectively).{28373,28369} It can block the production of IL-23 by activated monocytes and the production of IFN-γ and IL-2 by T cells.{28373} ONX 0914 can also inhibit IL-17-producing T cells under TH17-polarizing conditions in vitro and reduce TH1 and TH17 cell differentiation in vivo.{28372} This compound has been shown to attenuate disease progression in several experimental models of autoimmune disorders as well as in some hematologic malignancies.{28373,28370,28241,28371}