pathophysiological functions of these enzymes are not fully understood due to lack of potent and selective NTPDase inhibitors. Herein, a series of oxoindolin hydrazine carbothioamide derivatives is synthesized and screened for NTPDase inhibitory activity. Four compounds were identified as selective inhibitors of h-NTPDase1 having IC50 values in lower micromolar range, these include compounds 8b (IC50 = 0.29 ± 0
[EN] THIOSEMICARBAZONES WITH MDR1 - INVERSE ACTIVITY<br/>[FR] THIOSEMICARBAZONES À ACTIVITÉ ANTI-MDR1
申请人:US HEALTH
公开号:WO2012033601A1
公开(公告)日:2012-03-15
Disclosed herein are drug compounds that have MDR-inverse activity and thus are effective against multidrug-resistant cells. Exemplary compounds disclosed herein have the structure;Formula (I). Examples of the disclosed compounds have been found to have, inter alia, efficacy in directly treating multidrug resistant cells, rendering multidrug resistant cells susceptible to other chemotherapeutics and in some instances reversing multidrug resistance.
Synthesis, Activity, and Pharmacophore Development for Isatin-β-thiosemicarbazones with Selective Activity toward Multidrug-Resistant Cells
作者:Matthew D. Hall、Noeris K. Salam、Jennifer L. Hellawell、Henry M. Fales、Caroline B. Kensler、Joseph A. Ludwig、Gergely Szakács、David E. Hibbs、Michael M. Gottesman
DOI:10.1021/jm800861c
日期:2009.5.28
We have recently identified a new class of compounds that selectively kill cells that express P-glycoprotein (P-gp, MDR1), the ATPase efflux pump that confers multidrug resistance on cancer cells. Several isatin-beta-thiosemicarbazones from our initial study have been validated and a range of analogues synthesized and tested. A number demonstrated improved MDR1-selective activity over the lead, NSC73306 (1). Pharmacophores for cytotoxicity and MDR1 selectivity were generated to delineate the structural features required for activity. The MDR1-selective pharmacophore highlights the importance of aromatic/hydrophobic features at the N4 position of the thiosemicarbazone and the reliance on the isatin moiety as key bioisosteric contributors. Additionally, a quantitative structure-activity relationship (QSAR) model that yielded a cross-validated correlation coefficient of 0.85 effectively predicts the cytotoxicity of untested thiosemicarbazones. Together, the models serve as effective approaches for predicting structures with MDR1-selective activity and aid in directing the search for the mechanism of action of 1.
Oxindole derivatives as inhibitors of TAK1 kinase
作者:Jeffrey W. Lockman、Matthew D. Reeder、Rosann Robinson、Patricia A. Ormonde、Daniel M. Cimbora、Brandi L. Williams、J. Adam Willardsen
DOI:10.1016/j.bmcl.2011.01.077
日期:2011.3
Several series of oxindole analogues were synthesized and screened for inhibitory activity against transforming growth factor-beta-activating kinase 1 (TAK1). Modifications around several regions of the lead molecules were made, with a distal hydroxyl group in the D region being critical for activity. The most potent compound 10 shows an IC50 of 8.9 nM against TAK1 in a biochemical enzyme assay, with compounds 3 and 6 showing low micromolar cellular inhibition. (C) 2011 Elsevier Ltd. All rights reserved.
Isatin-β-thiosemicarbazones as potent herpes simplex virus inhibitors
A series of isatin-beta-thiosemicarbazones have been designed and evaluated for antiviral activity against herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2) in a plaque reduction assay. Their cytotoxicity was examined using human rhabdomyosarcoma cells (RD cells). Several derivatives of isatin-beta-thiosemicarbazone exhibited significant and selective antiviral activity with low cytotoxicity. It was found that the thiourea group at thiosemicarbazone and the NH functionality at isatin were essential for their anti-herpetic activity. The synthesis and structure-activity relationship studies are presented. (C) 2011 Elsevier Ltd. All rights reserved.