Substrate-guided optimization of the syringolins yields potent proteasome inhibitors with activity against leukemia cell lines
摘要:
Natural products that inhibit the proteasome have been fruitful starting points for the development of drug candidates. Those of the syringolin family have been underexploited in this context. Using the published model for substrate mimicry by the syringolins and knowledge about the substrate preferences of the proteolytic subunits of the human proteasome, we have designed, synthesized, and evaluated syringolin analogs. As some of our analogs inhibit the activity of the proteasome with second-order rate constants 5-fold greater than that of the methyl ester of syringolin B, we conclude that the substrate mimicry model for the syringolins is valid. The improvements in in vitro potency and the activities of particular analogs against leukemia cell lines are strong bases for further development of the syringolins as anti-cancer drugs. (c) 2015 Elsevier Ltd. All rights reserved.
Substrate-guided optimization of the syringolins yields potent proteasome inhibitors with activity against leukemia cell lines
摘要:
Natural products that inhibit the proteasome have been fruitful starting points for the development of drug candidates. Those of the syringolin family have been underexploited in this context. Using the published model for substrate mimicry by the syringolins and knowledge about the substrate preferences of the proteolytic subunits of the human proteasome, we have designed, synthesized, and evaluated syringolin analogs. As some of our analogs inhibit the activity of the proteasome with second-order rate constants 5-fold greater than that of the methyl ester of syringolin B, we conclude that the substrate mimicry model for the syringolins is valid. The improvements in in vitro potency and the activities of particular analogs against leukemia cell lines are strong bases for further development of the syringolins as anti-cancer drugs. (c) 2015 Elsevier Ltd. All rights reserved.
[EN] NOVEL SYRINGOLIN ANALOGUES AND METHODS OF MAKING AND USING SAME<br/>[FR] NOUVEAUX ANALOGUES DE SYRINGOLINE ET PROCÉDÉS DE FABRICATION ET D'UTILISATION DE CEUX-CI
申请人:UNIV BROWN
公开号:WO2016182968A1
公开(公告)日:2016-11-17
The present invention provides, in certain aspects, novel syringolin analogues, In certain embodiments, the compounds of the invention are proteasome inhibitors, In other embodiments, the compounds treat or prevent a cancer such as, but not limited to, leukemia in a subject,
作者:Michael C. Pirrung、Goutam Biswas、Tannya R. Ibarra-Rivera
DOI:10.1021/ol100761z
日期:2010.5.21
Total syntheses of two recently discovered proteasome inhibitors, syringolin A and B, are reported. The key to our approach was creation of the α,β-unsaturated 12-membered lactam via intramolecular Horner−Wadsworth−Emmons reaction. Such reactions have been broadly used to prepared macrolactones, but this work presents a rarer example of its application to macrolactams. The final steps involved attachment