[EN] NOVEL SESQUITERPENOID STAT3 INHIBITORS<br/>[FR] NOUVEAUX INHIBITEURS DE STAT3 SESQUITERPÉNOÏDES
申请人:UNIV HAWAII
公开号:WO2014205416A1
公开(公告)日:2014-12-24
The present disclosure provides a method of purifying pharmaceutical compositions consisting essentially of STAT3 inhibitors from a mixture of compounds, pharmaceutical compositions comprising STAT3 inhibitors used to inhibit STAT3 in tumor cells, and certain pharmaceutically acceptable salts thereof, and methods of use. The present disclosure features, in some embodiments, novel, potent and selective STAT3 inhibitors, including sesquiterpene lactone inhibitors.
The Synthesis of Azadirachtin: A Potent Insect Antifeedant
作者:Steven V. Ley、Antonio Abad-Somovilla、James C. Anderson、Carles Ayats、Rolf Bänteli、Edith Beckmann、Alistair Boyer、Maria G. Brasca、Abigail Brice、Howard B. Broughton、Brenda J. Burke、Ed Cleator、Donald Craig、Alastair A. Denholm、Ross M. Denton、Thomas Durand-Reville、Luca B. Gobbi、Michael Göbel、Brian Lawrence Gray、Robert B. Grossmann、Claire E. Gutteridge、Norbert Hahn、Sarah L. Harding、David C. Jennens、Lynn Jennens、Peter J. Lovell、Helen J. Lovell、Mary L. de la Puente、Hartmuth C. Kolb、Win-Jan Koot、Sarah L. Maslen、Catherine F. McCusker、Amos Mattes、Andrew R. Pape、Andrea Pinto、Dinos Santafianos、James S. Scott、Stephen C. Smith、Andrew Q. Somers、Christopher D. Spilling、Frank Stelzer、Peter L. Toogood、Richard M. Turner、Gemma E. Veitch、Anthony Wood、Cornelia Zumbrunn
DOI:10.1002/chem.200801103
日期:——
We describe in full the first synthesis of the potent insect antifeedant azadirachtinthrough a highly convergent approach. An O-alkylation reaction is used to unite decalin ketone and propargylic mesylate fragments, after which a Claisen rearrangement constructs the central C8-C14 bond in a stereoselective fashion. The allene which results from this sequence then enables a second critical carbon-carbon
Synthesis of Natural Products from the Indian Neem Tree <i>Azadirachta indica</i>
作者:Gemma E. Veitch、Andrea Pinto、Alistair Boyer、Edith Beckmann、James C. Anderson、Steven V. Ley
DOI:10.1021/ol7027898
日期:2008.2.1
The synthesis of five natural products (3, 6, 7, 10, and 14), isolated from the Indian neem tree Azadirachta indica, is reported from a common intermediate (2). The judicious choice of transacetalization conditions allows efficient access to both the azadirachtinin (9 and 10) and the azadirachtin (3, 6, 7, and 14) skeletons.
Hirsutinolide Series Inhibit Stat3 Activity, Alter GCN1, MAP1B, Hsp105, G6PD, Vimentin, TrxR1, and Importin α-2 Expression, and Induce Antitumor Effects against Human Glioma
作者:Gabriella Miklossy、Ui Joung Youn、Peibin Yue、Mingming Zhang、Chih-Hong Chen、Tyvette S. Hilliard、David Paladino、Yifei Li、Justin Choi、Jann N. Sarkaria、Joel K. Kawakami、Supakit Wongwiwatthananukit、Yuan Chen、Dianqing Sun、Leng Chee Chang、James Turkson
DOI:10.1021/acs.jmedchem.5b00686
日期:2015.10.8
We report that hirsutinolide series, 6, 7, 10, 11, 20, and 22, and the semisynthetic analogues, 30, 31, 33, and 36, inhibit constitutively active signal transducer and activator of transcription (Stat)3 and malignant glioma phenotype. A position 13 lipophilic ester group is required for activity. Molecular modeling and nuclear magnetic resonance structural analyses reveal direct hirsutinolide:Stat3 binding. One-hour treatment of cells with 6 and 22 also upregulated importin subunit alpha-2 levels and repressed translational activator GCN1, microtubule-associated protein (MAP) 1B, thioredoxin reductase (TrxR) 1 cytoplasmic isoform 3, glucose-6-phosphate 1-dehydrogenase isoform a, Hsp105, vimentin, and tumor necrosis factor a-induced protein (TNAP)2 expression. Active hirsutinolides inhibited anchorage-dependent and three-dimensional spheroid growth, survival, and migration of human glioma lines and glioma patients' tumor-derived xenograft cells harboring constitutively active Stat3. Oral gavage delivery of 6 or 22 inhibited human glioma tumor growth in subcutaneous mouse xenografts. The inhibition of Stat3 signaling represents part of the hirsutinolide-mediated mechanisms to induce antitumor effects.
Chemistry of renieramycins. Part 8: Synthesis and cytotoxicity evaluation of renieramycin M–jorunnamycin A analogues
Twenty-four ester analogues of renieramycin M (1m) were prepared from jorunnamycin A (3a), which was easily transformed from marine natural 1m in three steps. These analogues, along with 1m itself, cyanojorumycin (2b), and jorunnamycins A (3a) and C (3b), were evaluated in vitro for cytotoxicity by measuring IC50 values through the 3-(4,5-dimethyltriazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay using human HCT116 colon carcinoma and MDA-MB-435 breast carcinoma cell lines. Nitrogen-containing heterocyclic ester derivatives 9a-f showed similar in vitro cytotoxicity to 1m, whereas the other derivatives were slightly less cytotoxic than 1m. 2'-Pyridinecarboxylic acid ester derivative (9c) exhibited a threefold increase in cytotoxicity relative to 1m. (C) 2009 Elsevier Ltd. All rights reserved.