PMID- 30380863 OWN - NLM STAT- MEDLINE DCOM- 20191028 LR - 20210218 IS - 1520-4804 (Electronic) IS - 0022-2623 (Linking) VI - 61 IP - 24 DP - 2018 Dec 27 TI - Required Immunoproteasome Subunit Inhibition Profile for Anti-Inflammatory Efficacy and Clinical Candidate KZR-616 ((2 S,3 R)- N-(( S)-3-(Cyclopent-1-en-1-yl)-1-(( R)-2-methyloxiran-2-yl)-1-oxopropan-2-yl)-3-hydroxy-3-(4-methoxyphenyl)-2-(( S)-2-(2-morpholinoacetamido)propanamido)propenamide). PG - 11127-11143 LID - 10.1021/acs.jmedchem.8b01201 [doi] AB - Selective immunoproteasome inhibition is a promising approach for treating autoimmune disorders, but optimal proteolytic active site subunit inhibition profiles remain unknown. We reveal here our design of peptide epoxyketone-based selective low molecular mass polypeptide-7 (LMP7) and multicatalytic endopeptidase complex subunit-1 (MECL-1) subunit inhibitors. Utilizing these and our previously disclosed low molecular mass polypeptide-2 (LMP2) inhibitor, we demonstrate a requirement of dual LMP7/LMP2 or LMP7/MECL-1 subunit inhibition profiles for potent cytokine expression inhibition and in vivo efficacy in an inflammatory disease model. These and additional findings toward optimized solubility led the design and selection of KZR-616 disclosed here and presently in clinical trials for treatment of rheumatic disease. FAU - Johnson, Henry W B AU - Johnson HWB AD - Kezar Life Sciences , 4000 Shoreline Court, Suite 300 , South San Francisco , California 94080 , United States. FAU - Lowe, Eric AU - Lowe E AD - Kezar Life Sciences , 4000 Shoreline Court, Suite 300 , South San Francisco , California 94080 , United States. FAU - Anderl, Janet L AU - Anderl JL AD - Kezar Life Sciences , 4000 Shoreline Court, Suite 300 , South San Francisco , California 94080 , United States. FAU - Fan, Andrea AU - Fan A AD - Kezar Life Sciences , 4000 Shoreline Court, Suite 300 , South San Francisco , California 94080 , United States. FAU - Muchamuel, Tony AU - Muchamuel T AD - Kezar Life Sciences , 4000 Shoreline Court, Suite 300 , South San Francisco , California 94080 , United States. FAU - Bowers, Simeon AU - Bowers S AD - Onyx Pharmaceuticals, an Amgen Subsidiary , South San Francisco , California 94080 , United States. FAU - Moebius, David C AU - Moebius DC AD - Onyx Pharmaceuticals, an Amgen Subsidiary , South San Francisco , California 94080 , United States. FAU - Kirk, Christopher AU - Kirk C AD - Kezar Life Sciences , 4000 Shoreline Court, Suite 300 , South San Francisco , California 94080 , United States. FAU - McMinn, Dustin L AU - McMinn DL AUID- ORCID: 0000-0002-9584-7524 AD - Kezar Life Sciences , 4000 Shoreline Court, Suite 300 , South San Francisco , California 94080 , United States. LA - eng PT - Journal Article DEP - 20181211 PL - United States TA - J Med Chem JT - Journal of medicinal chemistry JID - 9716531 RN - 0 (Anti-Inflammatory Agents, Non-Steroidal) RN - 0 (Cytokines) RN - 0 (Morpholines) RN - 0 (Oligopeptides) RN - 0 (PR-957) RN - 0 (Proteasome Inhibitors) RN - 144416-78-4 (LMP-2 protein) RN - EC 3.4.22.- (Cysteine Endopeptidases) RN - EC 3.4.25.1 (LMP7 protein) RN - EC 3.4.25.1 (PSMB10 protein, human) RN - EC 3.4.25.1 (Proteasome Endopeptidase Complex) RN - O4BT6C02M2 (KZR-616) SB - IM MH - Administration, Intravenous MH - Animals MH - Anti-Inflammatory Agents, Non-Steroidal/chemistry/pharmacokinetics/*pharmacology MH - Arthritis, Experimental/drug therapy MH - Arthritis, Rheumatoid/*drug therapy MH - Cell Line, Tumor MH - Cysteine Endopeptidases/metabolism MH - Cytokines/metabolism MH - Drug Design MH - Female MH - Humans MH - Mice, Inbred BALB C MH - Morpholines/chemistry/pharmacokinetics/*pharmacology MH - Oligopeptides/pharmacology MH - Proteasome Endopeptidase Complex/immunology/metabolism MH - Proteasome Inhibitors/chemistry/pharmacokinetics/*pharmacology MH - Structure-Activity Relationship EDAT- 2018/11/02 06:00 MHDA- 2019/10/29 06:00 CRDT- 2018/11/02 06:00 PHST- 2018/11/02 06:00 [pubmed] PHST- 2019/10/29 06:00 [medline] PHST- 2018/11/02 06:00 [entrez] AID - 10.1021/acs.jmedchem.8b01201 [doi] PST - ppublish SO - J Med Chem. 2018 Dec 27;61(24):11127-11143. doi: 10.1021/acs.jmedchem.8b01201. Epub 2018 Dec 11.