5lav
From Proteopedia
Novel Spiro[3H-indole-3,2 -pyrrolidin]-2(1H)-one Inhibitors of the MDM2-p53 Interaction: HDM2 (MDM2) in complex with compound 6b
Structural highlights
DiseaseMDM2_HUMAN Note=Seems to be amplified in certain tumors (including soft tissue sarcomas, osteosarcomas and gliomas). A higher frequency of splice variants lacking p53 binding domain sequences was found in late-stage and high-grade ovarian and bladder carcinomas. Four of the splice variants show loss of p53 binding. FunctionMDM2_HUMAN E3 ubiquitin-protein ligase that mediates ubiquitination of p53/TP53, leading to its degradation by the proteasome. Inhibits p53/TP53- and p73/TP73-mediated cell cycle arrest and apoptosis by binding its transcriptional activation domain. Also acts as an ubiquitin ligase E3 toward itself and ARRB1. Permits the nuclear export of p53/TP53. Promotes proteasome-dependent ubiquitin-independent degradation of retinoblastoma RB1 protein. Inhibits DAXX-mediated apoptosis by inducing its ubiquitination and degradation. Component of the TRIM28/KAP1-MDM2-p53/TP53 complex involved in stabilizing p53/TP53. Also component of the TRIM28/KAP1-ERBB4-MDM2 complex which links growth factor and DNA damage response pathways. Mediates ubiquitination and subsequent proteasome degradation of DYRK2 in nucleus. Ubiquitinates IGF1R and promotes it to proteasomal degradation.[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] Publication Abstract from PubMedScaffold modification based on Wang s pioneering MDM2-p53 inhibitors led to novel, chemically stable spiro-oxindole compounds bearing a spiro[3H-indole-3,2 -pyrrolidin]-2(1H)-one scaffold that are not prone to epimerization as observed for the initial spiro[3H-indole-3,3 -pyrrolidin]-2(1H)-one scaffold. Further structure based optimization inspired by natural product architectures led to a complex fused ring system ideally suited to bind to the MDM2 protein and to interrupt its protein-protein interaction (PPI) with TP53. The compounds are highly selective and show in vivo efficacy in a SJSA-1 xenograft model even when given as a single dose as demonstrated for 4-[(3S,3'S,3'aS,5'R,6'aS)-6-chloro-3'-(3-chloro-2-fluorophenyl)-1'-(cyclopropylme thyl)-2-oxo-1,2,3',3'a,4',5',6',6'a-octahydro-1'H-spiro[indole-3,2'-pyrrolo[3,2-b ]pyrrole]-5'-yl]benzoic acid (BI-0252). Discovery of Novel Spiro[3H-indole-3,2 -pyrrolidin]-2(1H)-one Compounds as Chemically Stable, and Orally Active Inhibitors of the MDM2-p53 Interaction.,Gollner A, Rudolph D, Arnhof H, Bauer M, Blake SM, Boehmelt G, Cockcroft XL, Dahmann G, Ettmayer P, Gerstberger T, Karolyi-Oezguer J, Kessler D, Kofink C, Ramharter J, Rinnenthal J, Savchenko A, Schnitzer R, Weinstabl H, Weyer-Czernilofsky U, Wunberg T, McConnell DB J Med Chem. 2016 Oct 24. PMID:27775892[12] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. Loading citation details.. Citations No citations found See AlsoReferences
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