Delanzomib

Delanzomib is an orally bioavailable inhibitor of chymotrypsin-like proteasome activity (IC50 = 3.8 nM in isolated human erythrocytes) that only marginally inhibits tryptic and peptidyl glutamyl proteasome activity. Delanzomib pre-treatment (20 nM) in vitro inhibits IkappaBalpha degradation, NF-kappaB activation, and the expression of NF-kappaB-regulated genes, including IkappaBalpha, XIAP, TNF-alpha, IL-1beta, ICAM-1, and VEGF. Delanzomib induces apoptosis in multiple myeloma cell lines and inhibits proliferation in a panel of human hematologic and solid tumor cell lines (IC50s = 5.6-34.2 nM). It reduces tumor weight in an RPMI 8226 human multiple myeloma mouse xenograft model when administered intravenously at doses ranging from 1.5-4 mg/kg twice daily and leads to complete tumor regression at a chronic oral dose of 13 mg/kg. Delanzomib reduces the serum level of circulating cytokines, prevents renal tissue damage, and increases lifespan in a mouse model of fatal lupus nephritis. Formal Name: B-[(1R)-1-[[(2S,3R)-3-hydroxy-1-oxo-2-[[(6-phenyl-2-pyridinyl)carbonyl]amino]butyl]amino]-3-methylbutyl]-boronic acid. CAS Number: 847499-27-8. Synonyms: CEP-18770. Molecular Formula: C21H28BN3O5. Formula Weight: 413.3. Purity: >95%. Formulation: (Request formulation change), A crystalline solid. Solubility: DMF: 30 mg/ml, DMSO: 30 mg/ml, Ethanol: 30 mg/ml. lambdamax: 255 nm. SMILES: CC(C[C@H](NC([C@H]([C@H](O)C)NC(C1=CC=CC(C2=CC=CC=C2)=N1)=O)=O)B(O)O)C. InChi Code: InChI=1S/C21H28BN3O5/c1-13(2)12-18(22(29)30)24-21(28)19(14(3)26)25-20(27)17-11-7-10-16(23-17)15-8-5-4-6-9-15/h4-11,13-14,18-19,26,29-30H,12H2,1-3H3,(H,24,28)(H,25,27)/t14-,18+,19+/m1/s1. InChi Key: SJFBTAPEPRWNKH-CCKFTAQKSA-N.