A novel dicyanotriterpenoid, 2-cyano-3,12-dioxooleana-1,9(11)-dien-28-onitrile, active at picomolar concentrations for inhibition of nitric oxide production
作者:Tadashi Honda、Yukiko Honda、Frank G. Favaloro、Gordon W. Gribble、Nanjoo Suh、Andrew E. Place、Mara H. Rendi、Michael B. Sporn
DOI:10.1016/s0960-894x(02)00105-1
日期:2002.4
New oleanane triterpenoids with various substituents at the C-17 position of 2-evano-3,12-dioxooleana-1,9(11)dien-28-oic acid (CDDO) and methyl 2-carboxy-3,12-dioxooleana-1,9(11)-dien-28-oate were synthesized. Among them, 2-cyano-3,12-dioxooleana- 1,9(11)-dien-28-onitrile shows extremely high inhibitory activity (IC50 = 1 pM level) against production of nitric oxide induced by interferon-gamma in mouse macrophages. This potency is about 100 times and 30 times more potent than CDDO and dexamethasone, respectively. (C) 2002 Elsevier Science Ltd. All rights reserved.
Discovery of bardoxolone derivatives as novel orally active necroptosis inhibitors
(CDDO, 7) was an inhibitor of necroptosis identified from an in-house natural product library. Further optimization led to identify a more potent analogue 20. Compound 20 could effectively protect against necroptosis in human and mouse cells. The antinecroptotic effect could also be synergized with other necroptosis inhibitors. It blocked necrosome formation by targeting Hsp90 to inhibit the phosphorylation